An Enumeration of the Plants Collected by Dr. H. H. Rusby in South America, 1885-1886, XXXI. (Continued)

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An Enumeration of the Plants collected by Dr. H. H. Rusby in South
America, 1885-1886, XXXI.

By H. H. Rusby
(Continued from Bull. Torr. Club, 27 : 137. 24 Mr. 1900.)

Euphorbia pilulifera L. PI. Sp. 454. Yungas, 4000 ft., 1885
(no. 1945). Also seen at Guanai, where the Indians are said to
use it as an instillation to diseased eyes.

Euphorbia thymifolia L. Sp. PI. 454. Falls of Madeira, Brazil,
Oct. 1886 (no. 894).

Euphorbia cymbiformis Rusby, Mem. Torr. Club, 4: 255.
Yungas, 4000 ft, 1885 (no. 895).

Phyllanthns orbicularis L. C. Rich. Act. Soc. Hist. Nat. Par.
113. 1792. Falls of Madeira, Brazil, Oct. 1886(110.903).

Hevea Spruceana Muell. Arg. Linnaea, 34 : 204? 1865-66.
June, of Rivers Beni and Madre de Dios, Aug. 1886 (no. 885)
The principal rubber-yielding tree of the Beni district.

Jatropha Cure as L. Sp. PI. 006. Reis, 1500 ft, June, 1886
(no. 889). The plant is used to form hedges and the seeds are
used as a purge, under the name " Pinon."

Croton chamaedryfolius Griseb. Fl. Brit. W. Ind. 41. Mapiri,
5000 ft, Apr. 1886 (no. 901), and Falls of Madeira, Brazil, Oct.
1886 (no. 902). The same as Holton's no. 849.

Croton micans argyrophyllus Linnaea, 34 : 96. 1865-66.
Unduavi, 8000 ft., Oct. 1885 (no. 2623).

Croton Rusbyi Britton, Mem. Torr. Club, 6: 119. Mapiri,
2500 ft, May 1886 (no. 1224). No. 1223 is probably the same ;
my specimen is very poor.

Croton Spruceanus Benth. in Hook. Kew. Journ. 6 : 375.
1854. Falls of Madeira, Brazil, Oct. 1886 (no. 2622). A small
tree of some 15 ft., growing on the bank of a stream.

Croton Umcurana Baill. Adansonia, 4 : 335. 1863-64. Mapiri,
2500 ft., May 1886 (no. 1197). Yungas, 4000 ft, 1885 (no.
1236b), and Unduavi, 8000 ft, Oct. 1885 (no. 900).

301

302 Rusby: An Enumeration of the Plants

Manihot utilissima Pohl. PI. Bras. Ic. I : 32. pi. 24. Cult, at
Mapiri, 2500 ft., May 1886 (no. 887).

Manihot Aipi Pohl. /. c. 29. pi. 2j. Cult, at Mapiri, 5000 ft.
Apr. 1886 (no. 886).

Manihot Rusybi Britton sp. nov.

Inflorescence gray-to mentel late, the leaves puberulent on
the veins underneath : stems slender, terete, pale : petioles 4-7 cm.
long, stoutish, rigid: blades varying from entire, broadly ovate, 3-
ribbed, to deeply 3-lobed or nearly 3-foliolate, the lobes ovate,
acuminate and acute, .7-1 dm. long, 3-5 cm. broad, entire,
thin, pale : racemes several, terminal, 3 or 4 cm. long, short-
peduncled : pedicels 1 or 2 mm. long, stout : buds pyriform.
Staminate flowers only seen : perianth 1 cm. long, open-campanu-
late, lobed about half way, the lobes ovate, obtuse, purple with
yellowish summits ; longer filaments about equalling the corolla,
coiled, the shorter about half as long : anthers linear, nearly 3 mm.
long: disk fleshy, yellowish, deeply 10-lobed or of 10 almost dis-
tinct incurved narrow rib-like glands : pistil not perceptible.

Falls of Madeira, Oct. 1896 (no. 888). "Perhaps the same
as Mathews no. 1022 from Peru" [N. L. B.].

Acalypha hibiscifolia Britton, Mem. Torr. Club, 4: 257. Yun-
gas, 6000 ft., 1885 (no. 1275).

Acalypha communis Muell. Arg. Linnaea, 34: 23. 1865-66,
fide Britton, Unduavi, 8000 ft., Oct. 1885 (no. 1265) and Yungas >
6000 ft., 1885 (no. 1267).

Acalypha mollis H.B.K. Nov. Gen. et Sp. 2 : 94, fide Britton.
Sorata, 8000 ft, Feb. i886(no. 1257). Another collection from
the same locality, and unfortunately bearing the same number, is
probably a large-leaved form of the same.

Acalypha scandens Eenth. Hook. Kew Journ. 6 : 329. 1854.
Falls of Madeira, Brazil, Oct. 1886 (no. 1258). The same as
Spruce's no. 1000.

Acalypha sidaefolia Muell. Arg. Linnaea, 34 : 11. 1865-66.
June, of Rivers Beni and Madre de Dios, Aug. 1886 (nos. 1263
and 1266) and Yungas, 6000 ft., 1885 (no. 1262 and perhaps no.
1276).

Acalypha capillaris Rusby, Mem. Torr. Club, 4 : 257. Mapiri,
5000 ft., Apr. 1886 (no. 1259).

Acalypha cuspidata Jacq. Hort. Schoenb. 2 : 53.//. 243. Falls

COLLECTED IN SOUTH AMERICA, 1885-1886 303

of Madeira, Brazil, Oct. 1886 (no. 1274. 1273 from Yungas,
6000 ft. is regarded by Dr. Britton as of this species also).

Acalypha macrostachya Jacq. Hort. Schoenb. 2 : 63. pi. 245.
Unduavi, 8000 ft, Oct. 1885 (no. 1268. 1269, from Mapiri,
2500 ft, May 1886, may be a form of this, but my specimen is
fragmentary).

Acalypha villosa Jacq. Enum. PL Carib. 32, fide Britton. June,
of Rivers Beni and Madre de Dios, Aug. 1886 (no. 1271) and
Falls of Madeira, Brazil, Oct. 1886 (no. 1272).

Acalypha callosa Benth. PI. Hartw. 252, var., fide Britton. Un-
duavi, 8000 ft, Oct. 1885 (no. 1270).

Acalypha Brittoni sp. nov.

Branchlets, petioles, and principal veins of the lower leaf-sur-
faces gray-puberulent ; branches slender, elongated, terete, striate,
reddish : stipules 5 or 6 mm. long, linear-attenuate, reddish : peti-
oles 5 or 6 cm. long, very slender: blades .75-1.25 dm. long,
4-6.5 cm. broad, ovate, lightly cordate at the base, abruptly con-
tracted into an attenuate acumination at the apex, sharply serrate,
very thin, the venation lightly prominent on both sides, the
secondaries about 6 pairs, strongly ascending, connected by numer-
ous straightish tertiaries : pistillate spikes only seen, the peduncles
terminal, solitary, 2 or 3 cm. long, sharply angled, the spike 5-7
cm. long, 2.5 cm. broad, densely flowered, obtuse: bracts nearly
1.5 cm. long, two thirds as broad, 5-parted nearly to the base, the
segments lanceolate, attenuate, the middle much the largest, the
outermost a little shorter than the intermediate : ovary blackish,
tuberculate, globose-oval, lightly lobed, the styles very stout,
much broader upward, long-pinnatifid.

Mapiri, 5000 ft, May 1886 (no. 1260).

Acalypha inaequalis sp. nov.

Leaves gray and somewhat scurfy underneath : branchlets
numerous, slender, flexuous, purple : stipules 3-5 mm. long,
tapering regularly from the base to the acute point, thickish,
rigid, keeled: petioles .5-1 cm. long, stout, strongly channeled
above: blades 3-8 cm. long, 1-2.5 cm. broad, lanceolate, blunt
at the base, acuminate and obtusish at the apex, finely serrate,
thickish, pale green, the venation prominent underneath, the
secondaries about 8 pairs, stout, strongly ascending or suberect,
connected by the straightish tertiaries : spikes (staminate only

304 Rusby: An Enumeration of the Plants

seen) sessile, 3-7 cm. long, 1.5 mm. thick, pendulous, densely
flowered, gray : flowers 1 mm. broad.
Yungas, 6000 ft, 1885 (no. 1947).

Acalypha Benensis Britton sp. nov.

Densely gray-tomentose, the upper leaf-surfaces strigose :
branchlets stoutish, flexuous, very leafy : stipules 2 mm. long,
linear or almost setiform : petioles 1.5-2 cm. long, stout: blades
.5-1 dm. long, 2.5-4 cm. broad, lance-ovate, rounded at the
base, acuminate and very acute at the apex, finely serrate, entire
toward the base, thickish ; venation lightly prominent both sides,
the 10 or 12 pairs of secondaries strongly ascending, connected
by the straightish tertiaries : staminate spikes sessile, 4 or 5 cm.
long, 3 mm. thick, gray, densely flowered : pistillate spike (but
one seen) 1.25 dm. long, nearly 1 cm. broad, densely flowered :
scales of the pistillate flowers strongly veined, densely pilose, 5-7
mm. broad, 4 mm. long, inclusive of the (about 10) slenderly
subulate teeth, which are about 1.5 mm. long and separated by
broad rounded sinuses : ovary strongly pilose, depressed-globose,
deeply 3-lobed, about 2 mm. broad.

June, of Rivers Beni and Madre de Dios, Aug. 1886 (no.
1264). "Near A. Tarapotensis Muell. Arg." [N. L. B.].

Acalypha grandispicata Britton sp. nov.

Petioles, peduncles and youngest parts of the branchlets gray-
ish-puberulent : stipules about 5 mm. long, 1 mm. broad, taper-
ing regularly from the base to the acute apex, brown, membrana-
ceous, lightly keeled : petioles 2-6 cm. long, stout but weak,
coarsely angled : blades 2-3 dm. long, .6-1 dm. broad, oblong,
acute at the base, abruptly acuminate and acute at the apex, finely
short-serrate, very thin, glabrate, the secondaries 14-16 pairs,
strongly ascending, connected by the tertiaries : only one (pistillate)
spike seen, the peduncle 4 cm. long, stout, the spike more than 2
dm. long, 2.5 cm. broad, rather densely flowered: scales more
than 1 cm. long, their breadth greater, strongly concave, deeply
cleft into about 1 1 lanceolate acuminate segments, the middle
longest, the outer regularly smaller : ovary depressed-globose,
minutely tuberculate, lightly lobed, the styles short and broad.

Mapiri, 5000 ft., Apr. 1886 ( no. 1261 ).

Acalypha Lechleri Britton sp. nov.

Youngest portions and inflorescence finely gray-tomentellate ;
stems stout, costate : stipules about 5 mm. long, the basal portion

COLLECTED IN SOUTH AMERICA, I 88 5- 1 886 305

broadly ovate, keeled, rather abruptly contracted into a linear
attenuate termination, petioles .25—1 dm. long, rather weak, chan-
neled above, striate underneath : blades 1.5-3 dm. long, 6-8 cm.
broad, oblong or oval, blunt or rounded at the base, very abruptly
short-pointed at the apex, finely or obtusely serrate-dentate, thin,
bright green, the venation prominent underneath, the secondaries
about 12 pairs, strongly incurved, mostly connecting at the margin
and connected by the numerous crooked tertiaries : dioecious, the
staminate spikes from the upper axils, .8— 1.25 dm. long, 3 mm.
thick, sessile, densely flowered, gray.

Unduavi, 8000 ft., Oct. 1885 ( nos. 1420 and 2610).

Dr. Britton says "The same as Lechler's no. 2408, the pistil-
late spike terminal, 1 dm. long, 6 mm. broad." This agrees with
Mr. Bang's specimens of the pistillate plant (no. 2610), in which
the pistillate spike is gray and densely flowered ; scales thick, 5
mm. broad when flattened, completely enclosing the ovary, about
1 mm. long, exclusive of the (about 14) linear acuminate acute
teeth, the central 3 mm. long, gradually shorter toward the
edges, the outermost 1 mm. long ; sepals thick, broadly ovate,
about 1 mm. long ; ovary 1 mm. long, densely pilose ; style and
stigma blood-red, 2 mm. long, 1 mm. broad, thickish, strongly
pinnatifid.

Acalypha erosa sp. nov.

Leaf-surfaces minutely papillose, inflorescence pubescent :
branchlets elongated, slender, irregularly striate : stipules 3 or 4
cm. long, lance-ovate, acuminate and acute, brown : petioles 1-2
cm. long, stoutish : blades 1—2 dm. long, 5-7 cm. broad, oblong
to obovate, narrow but slightly cordate at the base, abruptly short-
pointed but obtuse at the apex, very coarsely and irregularly den-
tate, thin, the midrib and 14-16 pairs of lightly upcurved slender
secondaries prominent on the lower side, the venation lightly re-
ticulate : only young staminate spikes seen, the largest 7 cm.
long, 3 mm. thick.

Guanai, 2000 ft, May 1886 (no. 1757).

Alchornea latifolia Sw. Prod. Veg. Ind. Occ. 98, fide Britton,
Mapiri, 2500 ft, May 1886 (no. 2656).

Alchornea Pearcei Britton sp. nov.

Leaves minutely downy on the lower surfaces, pilose in the
axils of the midrib : branches elongated, densely leafy : petioles
1—2 cm. long, very stout : blades 1-1.5 dm. long, 4-6 cm. broad,

306 Rusby: An Enumeration of the Plants

oblanceolate or obovate, rounded at the narrow base, very short-
pointed and very obtuse, distantly and coarsely serrate, very thick,
3-ribbed, the venation lightly prominent above, very prominent
underneath, the stout secondaries about 4 pairs, the venation very
finely reticulate : raceme (but one seen) 2 dm. long, very slender,
pendulous, very loosely flowered : flowers purple, scarcely 1 mm.
broad.

Mapiri, 5000 ft., Apr. 1886 (no. 1975). " Collected by
Pearce at Maro, 3000-4000 ft, 1886. Male inflorescence
branched, female simple. Styles 2, 1 mm. long, ovary and young
fruit with minute stellate hairs" [N. L. B.].

Conceveiba Guianensis Aubl. PL Gui. 2 : 924. pi. 333. Mapiri,
2500 ft, May 1886 (no. 2656).

Conceveiba pubescens Britton sp. nov.

Staminate plant : — Branchlets, lower leaf-surfaces, etc., stellate-
pubescent, the younger portions ferruginous : branchlets stout,
purple, very leafy : petioles 2-4 cm. long, very stout, dilated at
the insertion, striate, reticulate, deep-purple: blades 1.5-2 dm.
long, .75-1 dm. broad, ovate, rounded to subcordate at the base,
abruptly and obtusely short-pointed, coarsely sinuate-serrate, ex-
tremely thick and rigid, smooth above with the midrib and second-
aries impressed, the venation strongly and sharply prominent
underneath, the secondaries about 6 pairs, strongly ascending and
connecting near the margin, the lowest pair much stronger, the
straightish tertiaries connecting the secondaries : panicles solitary
in the axils, short -peduncled, subulate-bracted at the base, the
peduncle and rachis sharply angled, nearly 1 dm. long, the
branches few and short, the flowers closely aggregated on the
very short branchlets ; buds globose, about 1 mm. broad.

Pistillate plant (if Mr. Bang's no. 2375 is the same) : leave-
much thinner, the pubescence nearly obsolete, the lowest seconds
aries much longer : spikes almost simple, very slender, very loosely
flowered : the flowers sessile and solitary (rarely geminate) at the
nodes : calyx parted nearly to the base, the lobes oblong-ovate,
obtuse, 1.5 mm. long: ovary 2.5 mm. long, densely white-pilose,
ovoid : styles barely connate at the base, 4 or 5 mm. long,
strongly flattened, oblong, blunt, purple at the tip, thick and fleshy.

Yungas, 4000 ft., 1885 (no. 2655, as to the staminate plant).

Same locality, Aug. 6, 1894 (Bang, no. 2375, as to the pistil-
late plant). Mr. Bang says, "A shrub 10 to 1 5 ft. high, with green
flowers, in wet forest-mould."

COLLECTED IN SOUTH AMERICA, 1885-1886 307

Cleidion tricoccum Baill. Adansonia, 4 : 370. 1863-64. June,
of Rivers Beni and Madre de Dios, Aug. 1886 (no. 2652).

Tragia Fendleri Muell. Arg. Linnaea, 34: 179. 1865-66. June,
of Rivers Beni and Madre de Dios, Aug. 1886 (no. 1863).

Tragia Sellowiana glabrifolia Britton var. nov.

Differs from the type chiefly in its subglabrous, larger leaves,
Reis, 1500 ft., June 1886 (no. 1285).

Tragia volubilis L. Sp. 980. Guanai, 2000 ft., May 1886,
(no. 2595). The same as Mandon's no. 1069.

Dalechampia Burchellii Muell. Arg. Mart. Fl. Bras. II 2 : 649,
fide Britton. Reis, 1500 ft., June 1886 (no. 2088. No. 2162
from Falls of Madeira appears to me identical).

Dalechampia scandens L. Syst. ed. XIII, 720. Guanai, 2000 ft.,
May 1886 (no. 1347).

Dalechampia triphylla Lam. Encyc. 2 : 258. Guanai, 2000 ft.,
May 1886 (no. 12 15).

Mabea fistulifera Mart. Reise Bras. 479. Guanai, 2000 ft.,
May 1886 (no. 1178).

Mabea angustifolia longifolia Britton, Mem. Torn Club, 4 : 258.
Mapiri, 2500 ft., May 1886 (no. 1177).

Mabea paniculata Spruce ex Benth.; Hook. Kew Journ. 6 :
367. 1854. June, of Rivers Beni and Madre de Dios, Aug.
1886 (no. 271 1 ), and Falls of Madeira, Brazil, Oct. 1886 (no. 2609).

Omphalea diandra L. Syst. ed. X., 1264. June, of Rivers Beni
and Madre de Dios, Aug. 1886 (no. 1251).

Maprounea Guianensis Aubl. PL Gui. 2 : 893. //. j^.
Yungas, 4000 ft., 1885 (no. 1176).

Saphim biglandidosum Muell. Arg. Linnaea, 32: 116.
1863. Falls of Madeira, Brazil, Oct. 1886 (nos. 1238 and 1239).

Sapium rhombifolium sp. nov.

Glabrous : branches elongated, erect or strongly ascending,
slender, flexuous, the internodes about 1-2 cm. long : petioles
.5-1 cm. long, purple: blades .5-1 dm. long, 2.5-4 cm - broad,
rhomboidally ovate, acute at the base, abruptly short-acuminate
and obtuse at the apex, thickish, pale green, shining above, the
venation sharply prominent on both sides, the secondaries about
10 pairs, slender, diverging at an angle of about 45 °, the veins

308 Rusby: An Enumeration of the Plants

coarsely and irregularly reticulate : spikes simple, recurved, .5-1
dm. long, 2 or 3 mm. broad, the rachis thickish, rather loosely flow-
ered : staminate flowers bright yellow, 1 mm. broad : pistillate
flowers solitary near the base of the spike, very stoutly peduncled,
the greenish perigone 3-lobed, the lobes thin, broadly ovate,
erose, the stigmas very large and thick, fleshy, tapering, strongly
circinately recurved.

Falls of Madeira, Oct. 1886 (no. 1824).

Pera disticliophylla (Mart.) Baill. Etud. Gen. Euph. 434
(Spixia disticliophylla Mart. Herb. Fl. Bras. 270). Falls of Ma-
deira, Brazil, Oct. 1886 (no. 2597).

Pera sp. near P. oppositifolia t June, of Rivers Beni and
Madre de Dios, Aug. 1886 (no. 2646).

Pera sp. ? Guanai, 2000 ft., May 1886 (no. 1247). I have
little doubt of the genus, though the specimen exhibits neither
flower nor fruit.

No. 2633, from Falls of Madeira, Brazil, Oct. 1886, is a
Euphorbiaceous plant in fruit, which Dr. Britton regards as an
Alchornea. No. 713, from June, of Rivers Beni and Madre de
Dios, is the same.

URTICACEAE

Celtis morifolia Planch, in Ann. Sci. Nat. III. 10 : 311. 1848.
Yungas, 6000 ft, 1885 (no. 1755). The same as Bang's no. 1902
and {fide Britton) Matthew's no. 826.

Celtis Iguaneus (Jacq.) Sarg. Silva, 7 : 64, ex Rusby Ms.
Yungas, 6000 ft., 1885 (no. 1286). The same as Bang's no.

1539-

Trema micrantha (L.) Blume Mus. Bot. Lugd. Bat. 2 : 58
[Rhamnus micrantha L. Syst. ed. X. 937). June, of Rivers Beni
and Madre de Dios, Aug. 1886 (no. 1474). The same as Bang's
no. 2065.

Trema ajfinis Blume 1. c. Yungas, 6000 ft., 1885 (no. 1473).

Chlorophora tinctoria (L.) Gaud. Freyc. Voy. Bot. 108, in note
{Morns tinctoria L. Sp. 986). Beni River, July 1886 (no. 1284).

Ficus Mathewsii Miq. Ann. Mus. Bot. Lugd. Bat. 3 : 298
{Urostigma Mathewsii Miq.; Hook. Lond. Journ. Bot. 6 : (1847)
549). Mapiri, 5000 ft., Apr. 1886 (no. 2496). The same as
Mathew's 2059 an d Traill's no. 715 from the Amazon.

COLLECTED IN SOUTH AMERICA, 1885-1886 309

Pharmacosycea Brittoni sp. nov.

Glabrous, or the petioles and midribs minutely puberulent :
branchlets very stout, but weak, coarsely angled, somewhat ver-
rucose : petioles 5 cm. or more long, slender for the size of the
leaf, channelled above: blades 1-2.5 dm. long, .75-1 dm. broad,
obovate, rounded at the base, very abruptly short-pointed and ob-
tuse at the apex, entire, the venation inconspicuous above, promi-
nent underneath, the secondaries about 18 or 20 pairs with inter-
mediate lesser ones, at an angle of about 75 with the midrib,
interarching near the midrib : fruit globose, 2 cm. long, the per-
sistent thin margin reflexed, sinuately lobed : akenes on filiform
upwardly thickened pedicels, oval or obovoid with a broad apex,
1.5 mm. long, 1 mm. broad.

Guanai, 2000 ft., May 1887 (no. 2640).

Sorocca muriculata Miq. in Mart. Fl. Bras. 4 1 : 113. June, of
Rivers Beni and Madre de Dios, Aug. 1886 (no. 2217), and Falls
of Madeira, Brazil, Oct. 1886 (no. 2578). A widely branching
shrub, 6-10 ft. in height.

Cecropia sp. The specimen is not fit for a diagnosis.

Urtica purpurascens Nutt. Trans. Am. Phil. Soc. 5 : 169.
1837. Unduavi, 8000 ft, Oct. 1885 (no. 2561).

Urtica Magellanica Juss. ex Poir. Encyc. Suppl. 4 : 223. Vic.
La Paz, 10,000 ft., Apr. 1885 (no. 1254).

Urtica ballotifolia Wedd. Ann. Sci. Nat. III. 18 : 197. 1852.
Unduavi, 8000 ft, Oct. 1885 (no. 1256).

Urtica flabellata H.B.K. Nov. Gen. et Sp. 2 : 40. Yungas,
4000 ft, 1885 (no. 1255).

Urera Caracasana (Jacq.) Griseb. Fl. Brit. W. Ind. 154 {Ur-
tica Caracasana Jacq. Hort. Schoenb. 3: 71. //. j86). Yungas,
4000 ft, 1885 (no. 1464); Guanai, 2000 ft, May 1886 (no.
1468) and Beni River, July and Aug. 1886 (nos. 1465, 1466 and
1472).

Urera baccifera (L.) Gaud. Frecy. Voy. Bot. 497. Mapiri,
2500 ft., May 1886 (no. 1467). As large as a small apple tree,
the trunk and branches thickly beset with brittle, stinging red and
white prickles several inches in length and very slender.

Urera sinuata Wedd, Ann. Sci. Nat. Ill, 18: 201. Yungas,
6000 ft., 1885 (no. 1470).

310 Rusby: An Enumeration of the Plants

Urera rugosa sp. nov.

Hispidity confined chiefly to the inflorescence : branchlets stout,
soft and weak, light brown : stipules about 7 mm. long, 4 mm.
broad, the body broadly ovate, with an attenuate acumination :
petioles 2.5-4 cm. long, very stout, weak ; blades 1— 1.5 dm. long,
6-8 cm. broad, ovate or oval, rounded at the base, perfect apex
not seen, coarsely short-dentate, the teeth obscurely apiculate :
leaf very thin, dark green above, bright green underneath, subtri-
nerved, the venation inconspicuous above, prominent underneath,
the midrib and six to eight pairs of strongly ascending secondaries
dark purple, coarse, broad, nerved, connected by the straightish
tertiaries : panicles 1 dm. or more long, densely branched, droop-
ing, the rachis thick and fleshy, sparsely white -hispid : berries
nearly globose, 4 mm. long, tipped with the short and very stout
yellowish style.

Unduavi, 8000 ft, Oct. 1885 (no. 1471).

Urera filiformis sp. nov.

Leaf-surfaces and inflorescence minutely grayish-puberulent :
branchlets stout, purple, terete : stipules 7-9 mm. long, purple,
ovate, long-acuminate, keeled : only the younger leaves seen, the
petioles 1 cm. long, broad, the blades 6-9 cm. long, 2.5-3 cm -
broad, oblong-ovate, rounded at the base, acute, sharply serrate-
dentate, thin, 3-nerved, the venation lightly prominent underneath,
the secondaries about 10 pairs, the venation coarsely reticulate :
panicles numerous, about 1 dm. long, consisting of few elongated,
filiform branches along which the very small flower-clusters are
rather densely disposed.

Yungas, 6000 ft, 1885 (no. 1469). This seems to be the
same as E. P. Johnson's no. 97, from Tobasco, in Herb. Kew.
under U. microcarpa.

Urera Rusbyi Britton sp. nov.

Glabrous, except the minute puberulence on the lower leaf-
surfaces : branches coarse, deep purple, coarsely angled : stipules
not seen : petioles 2-4 cm. long, very slender : blades 1.25-2 dm.
long, 5-7.5 cm. broad, oval, narrowed but blunt at the base, ab-
ruptly short-acuminate and obtusish at the apex, shortly crenate-
dentate, 3-nerved, the lateral nerves originating near the base, the
very slender and inconspicuous venation coarsely reticulate :
panicle shortly and stoutly peduncled, 2 or 3 dm. long and broad,
the branches very numerous and very slender, the flower-clusters
rather loosely disposed, the flowers nearly 3 mm. broad.

Yungas, 6000 ft, 1885 (no. 1774).

COLLECTED IN SOUTH AMERICA, I885-I886 3]_1

Pilea anomala Wedd. in Am. Sci. Nat. Ill, 18: 217. 1852.
Sorata, 8000 ft., Feb. 1886 (no. 1480) and Yungas, 6000 ft, 1885
(no. 1478). The same as Mandon's no. 1104.

Pilea rotundata Griseb. Fl. Brit. W. Ind. 158. Unduavi, 8000
ft, Oct. 1885 (no. 1483).

Pilea dauciodora Wedd. in Am. Sci. Nat. Ser. 18: 223. 1852.
Unduavi, 8000 ft., Oct. 1885 (nos. 1479 and 1485).

Pilea cymbifolia sp. nov.

Leaf-surfaces minutely stellate ; stems erect, flexuous, stoutish,
in my specimen nearly 4 dm. long, the internodes about 3 cm.
long : stipules 6 or 7 mm. long, ovate, obtusish, brown, scarious :
petioles 1.5-2 cm. long: blades .7-1 dm. long, 1.5-2 cm. broad,
oblong and highly inaequilateral, blunt or rounded at the base, ab-
ruptly short-acuminate and obtuse at the apex, apparently disposed
with the edges vertical, the upper edge nearly straight, the lower
convex, finely serrate, the teeth varying from acute to rounded,
thin, strongly 3 -nerved, the lateral nerves starting from near the
base, the venation little prominent on either side : peduncles 1.2-2
cm. long, very slender, erect, the globose heads nearly 1 cm.
broad, densely flowered, fully expanded flower nearly 4 mm. broad,
the divisions oval, obtuse, very thin, a little shorter than the fila-
ments : anthers 1 mm. long and nearly as broad.

Yungas, 6000 ft, 1885 (no. 1482).

Pilea filipes sp. nov.

Very minutely puberulent : stems 2 to 4 dm. long, ascend-
ing, thickish but weak : stipules .5-1 cm. long, broadly ovate,
exceedingly thin, transparent, reddish-brown: petioles 1.5-2.5
cm. long, slender : blades 2. 5-6 cm. long, 1 . 5-3 cm. broad, ovate,
rounded or blunt at the base, very short-pointed and acute or ob-
tuse at the apex, crenate-dentate, very thin, pale below, 3 -nerved :
peduncles 4 or 5 cm. long, filiform, nearly erect, the cyme racemi-
form and secund, one or two cm. long, the flowers cymosely
clustered at intervals of about 3-7 mm.: bracts 2 mm. long,
broadly ovate, acute : pistil conical, a little shorter than the bract :
the stigma capitate, small. Staminate flowers not seen.

Yungas, 6000 ft, 1885 (no. 1756). The same as Bang's no.
1788. Species near P. ciliaris.

Pilea sublobata sp. nov.
Younger portions and lower leaf-surfaces sparsely short-pilose :

312 Rusby: An Enumeration of the Plants

stems 1-2 dm. long, rooting at the base, ascending, very slender,
subsimple : stipules 2 or 3 mm. long, broadly ovate, blunt, sca-
rious, brownish : pedicels 2-7 mm., slender : blades 1-2 cm. long,
.5-1 cm. broad, ovate, blunt or rounded at the base, obtuse, deeply
crenate-dentate or lobed, the teeth or lobes 3-5 pairs, thin, deep
green: peduncles .5-1 cm. long, filiform: head about 3 mm.
broad, densely few-flowered, the flowers purplish.
Unduavi, 8000 ft., Oct. 1885 (no. 1484).

Pilea urerifolia sp. nov.

Upper leaf-surfaces minutely stellate : stems blackish, stout but
weak : stipules 5-7 mm. long, 2 or 3 mm. broad, tapering from the
base, brown-scarious petioles 1.5— 4 cm. long, weak : blades 1-1.2
dm. long, 4-6 cm. broad, oblong or oval, highly inaequilateral, obtuse
at the base, abruptly contracted into a tapering acute summit, cre-
nate-dentate, dark green, very thin, strongly 3 -ribbed, the ribs black-
ish, the branches from the midrib meeting those from the laterals
about one third of the distance from the latter: peduncles 1-3 cm.
long, slender, weak, blackish : heads globose, yellow, about 1 cm. in
diameter: pedicels 1.5 mm. long, transparent; calyx campanulate,
nearly 2 mm. long and broad, deeply 4- lobed, the lobes oval, el-
liptical, transparent : filaments thick, as long as the perianth, fleshy :
anthers oval, half as long as the filament. Pistillate flowers not
seen.

Unduavi, 8000 ft., Oct. 1885 (no. 1 481). Also collected by
Mr. Bang at Sacramento, Yungas, Aug. 6, 1894 (no. 2374). Mr.
Bang says, " A small plant, a few feet high, with white flowers,
abundant in rich forest-mould."

Boehmeria brevirostris Wedd. Ann. Sci. Nat. IV, 1 : 201. 1854.
Unduavi, 8000 ft, Oct. 1885 (nos. 1280 and 1281). The same
as Mathews' no. 2039.

Boehmeria caudata Sw. Prod. Veg. Ind. Occ. 34. Yungas,
6000 ft., 1885 (no. 1277). The same as Mandon's no. 1 107.

Boehmeria sp. near B. Pavonii Wedd. Ann. Sci. Nat. IV, I :
202. 1854. Yungas, 6000 ft., 1885 (no. 1278). The same as
Bang's no. 328.

Boehmeria tenuistachys sp. nov.

Ferruginous-pilose, the lower leaf-surfaces somewhat tomen-
tose, the upper strigose : branches mostly erect or strongly ascend-
ing, 1 dm. or more long, somewhat angled : stipules caducous, 6-8
mm. long, lanceolate, tapering regularly from the base to an acute

COLLECTED IN SOUTH AMERICA, 1885-I886 313

point : petioles 1.5—3 cm - ^ on S> slender : blades 3—6 cm. long 1.5—
3 cm. broad, ovate, subrotund at the base, short-acuminate and
acute, sharply serrate, thickish, strongly 3 -nerved from the base,
above finely bullate with the impressed venation, the venation
prominent underneath : spikes simple, sessile or short -peduncled,
5-8 cm. long, 3 or 4 mm. thick, the rachis slender, pilose, the
flower-clusters dense, rather closely disposed : fully expanded peri-
gone 3 mm. broad, divided nearly to the base, transparent, brown-
ish, the segments triangular-ovate, acutish.

Unduavi, 8000 ft, Oct. 1885 (no. 1475).

Pouzolzia asper Wedd. ; DC. Prod. 16 1 : 233 {Margarocarpiis
asper Wedd. Ann. Sci. Nat. IV. I : 204. 1854). Yungas, 6000
ft., 1885 (no. 2636). The same as Matthews' no. 2036.

Plienax ballotifolius (Kunth.) Wedd. Ann. Sci. Nat. IV. I :
192. 1854. Unduavi, 8000 ft., Oct. 1885 (nos. 1279 and 1282),
and Beni River, July 1886 (no. 1283).

Phenax pauciserrata (Wedd.) {P. Sonneratii paucisei'rata
Wedd. ; DC. Prod. 16 1 : 235). Sorata, 8000 ft., Feb. 1886 (nos.
1476 and 1477).

Juglans sp.

Entire leaf (only the uppermost seen) about 3 dm. long, the
petiole about 1 dm. long : leaflets 7 ^ pairs, sessile, 4.5-8 cm. long,
2—3 cm. broad, ovate, highly inaequilateral, rounded to subcordate,
acuminate and acute, obscurely serrate, glabrate above, fer-
ruginous-tomentose with branched or tufted hairs underneath ;
midrib and 12—14 pairs of crooked upcurved secondaries promi-
nent on the under side, the latter connected by the tertiaries.

Sorata, 8000 ft., Feb. 1 886 (no. 744). Dr. Britton regards
this as an undescribed species, but the fruit specimen having been
lost, a full description is impossible.

CASUARINEAE
Lacistema aggregata (Berg.). Yungas, 6000 ft., 1885 (no.
2704).