Part 1, 1918] RUBIACEAE 53 
11. Rondeletia Langlassei Standley, sp. nov. 
Tree, 3-4 meters high, the branches stout, terete, reddish-brown, lenticellate, appressed- 
pilose with fulvous hairs when young; stipules triangular-oblong, 5-9 mm. long, obtuse, foli- 
aceous, reflexed, strigose-sericeous; leaves opposite, the petioles stout, 2-3 mm. long, fulvous- 
pilose, the blades lance-elliptic or narrowly ovate-oblong, 9-12.5 cm. long, 2-4 em. wide, ob- 
tuse or acute at the base, acute to attenuate at the apex, thin, deep-green above and thinly 
appressed-pilose, pale beneath and densely short-pilose with fulvous hairs, strigose along the 
veins, the costa slender, prominent, the lateral veins slender, about 8 on each side, subarcuate, 
ascending at an angle of 45°, the secondary veins obscure; inflorescence terminal, cymose- 
corymbose, hemispheric, 10 cm. broad, the peduncle 5.5 cm. long, the cymes rather laxly many- 
flowered, the flowers short-pedicellate; bracts large, foliaceous, the bractlets minute; hypan- 
, thium subglobose, densely pilose with short fulvous appressed hairs; calyx-lobes 5, oblong, 
obtuse, 1 mm. long, erect; corolla pink, strigillose outside, the tube slender, 15 mm. long, 
densely yellow-pilose in the throat, the 5 lobes oblong to oval-obovate, 2.5-5 mm. long, spread- 
ing, puberulent within. 
Type collected in the Sierra Madre of Michoacan or Guerrero, altitude 1750 meters, January 26, 
1899, E. Langlassé 797 (U. S. Nat. Herb. no. 386194). 
II. Leucophyllae. Leaves large, thin, white-tomentose beneath, at least when young. 
Stipules small, erect. Inflorescence terminal, many-flowered, cymose-paniculate, cymose- 
racemose, or capitate, the flowers 4-parted; calyx-lobes short or elongate, narrow or broad; 
corolla large, arachnoid-tomentose outside, naked in the throat. Capsule globose or subglobose, 
small. Seeds exalate. 
12. Rondeletia darienensis Standley, sp. nov. 
Branches slender, terete, brown, loosely arachnoid-tomentose when young; stipules 
linear-oblong, 3-5 mm. long, obtuse, tomentose or glabrate, erect, persistent; leaves opposite, 
the petioles slender, 0.6-1.7 cm. long, arachnoid-tomentose when young, the blades elliptic, 
elliptic-oblong, or oval-oblong, 7—-16.5 cm. long, 2.5—7.7 cm. wide, rounded to acutish at the 
base, short-acuminate at the apex, thin, green above, very thinly arachnoid-tomentose when 
young but soon glabrate, beneath densely arachnoid-tomentose with grayish hairs, the vena- 
tion prominent, the lateral veins slender, about 9 on each side, subarcuate; inflorescence termi- 
nal, cymose-paniculate, trichotomous, few-flowered, the flowers pedicellate; hypanthium densely 
tomentose; calyx-lobes 4, lanceolate or narrowly elliptic-oblong, 1-1.5 cm. long, 2.5-4 mm. 
wide,acute to attenuate, glabrous or nearly so within; corolla in bud about 1.5 cm. long, 
densely tomentose; capsule subglobose, about 4 mm. long. 
Type collected at Boca de Pauarand6é, on Sambti River, southern Darién, Panama, altitude 20 
meters, February, 1912, H. Pittier 5684 (U. S. Nat. Herb. no. 867136). 
13. Rondeletia Rekoi Standley, Proc. Biol. Soc. Wash. 8: 126. 1918. 
Branchlets stout or slender, obtusely tetragonous, densely and persistently white-tomen- 
tose, with a close tomentum; stipules linear-oblong, 6-9 mm. long, bidentate at the apex, 
erect, persistent, densely tomentose outside on the lower half, glabrate and green above; 
leaves opposite, the petioles very stout, 0.5—1.5 cm. long, white-tomentose, the blades ovate or 
elliptic-ovate, 8.5—-19 em. long, 3-8.5 cm. wide, rounded and short-decurrent at the base, very 
acute or subacuminate at the apex, subchartaceous, bright-green above, lustrous, scabrous 
with short slender curved hairs, the intermediate veins very prominent, finely reticulate, be- 
neath densely covered with a close white tomentum, the costa prominent, the lateral veins 
slender, about 14 on each side, subarcuate, the margin plane or subrevolute; inflorescence 
terminal (a pair of cymes present at the base of the peduncle), the peduncles stout, 8-9 cm. 
long, the rhachis 6-9 cm. long, bearing numerous short-pedunculate bifid cymes, the branches 
of these 1.5—2.5 cm. long, the flowers sessile, secund, the bractlets oval or oblong, obtuse, green, 
glabrate, about equaling the hypanthium; hypanthium densely white-tomentose; calyx-lobes 4, 
oblong or oval, about 1 mm. long, rounded at the apex, green, glabrate, spreading; corolla 
