Part 1, 1918] RUBIACEAE 55 
hairs, beneath densely white-tomentose when young, the tomentum deciduous in age, the lower 
surface then short-pilose, the venation prominent, the lateral veins 8 or 9 on each side, sub- 
arcuate, ascending at an acute angle; inflorescence terminal, cymose-paniculate, many-flowered, 
very dense, hemispheric, 3-4 cm. broad, pedunculate, the flowers sessile or nearly so; bracts 
and bractlets small; hypanthium densely pilose with short whitish appressed hairs; calyx- 
lobes 4, oval to ovate-deltoid, obtuse or rounded, 1-2 mm. long, erect; corolla arachnoid- 
tomentose outside the tube stout, 8-9 mm. long, the throat naked, the 4 lobes rounded, about 
3 mm. long; anthers included. 
Type collected at Pont du Rodeo, below Pacaca, Costa Rica, January, 1891, H. Pittier 3243 
(U. S. Nat. Herb. no. 941408). 
17. Rondeletia nitida Hemsl. Diag. Pl. Nov. 39. 1879. 
Shrub, the branches slender, terete, glabrous; stipules ovate-lanceolate, long-acuminate, 
about 4 mm. long; leaves opposite, the petioles 4-6 mm. long, the blades narrowly lanceolate 
or lance-elliptic, 5-10 cm. long, 1.2—2.8 cm. wide, long-acuminate at each end, glabrous and 
lustrous on the upper surface, beneath covered with a close white tomentum; inflorescence 
terminal, the flowers short-pedicellate, cymose-paniculate, the panicles few-flowered; bracts 
linear, obtuse; hypanthium white-tomentose; calyx-lobes 4, unequal, orbicular-oblong, 0.5—1.5 
mim. long; corolla rose-colored, white-tomentose outside, the tube about 12 mm. long, sparsely 
pilose within near the base, the throat naked, the 4 lobes orbicular, undulate, spreading; ovary 
subglobose. 
TYPE LOCALITY: Chiapas. 
DISTRIBUTION: Chiapas. 
III. Laniflorae. Leaves large, thin, tomentose or variously pubescent beneath, some- 
times glabrate in age. Stipules erect, thick. Inflorescence terminal, many-flowered, cymose- 
paniculate, the panicles narrow, elongate, thyrsiform; the flowers 4-parted; calyx-lobes small 
or foliaceous; corolla small or large, usually pubescent outside, the throat naked. Capsule 
globose, small. Seeds exalate. 
18. Rondeletia septicidalis B. L. Robinson, Proc. Am. Acad. 45: 403. 
1910: 
Shrub, the branches slender, terete, reddish-brown, coarsely lenticellate, thinly arachnoid- 
tomentulose when young, soon glabrate; stipules triangular-lanceolate, about 5 mm. long, 
attenuate, erect, persistent, thick, brown, glabrous; leaves opposite, the petioles stout, 4-23 mm. 
long, tomentulose or glabrate, the blades broadly ovate to lance-elliptic or lanceolate, 5-16 cm. 
long, 1.2-7 em. wide, acute or abruptly acuminate at the base, narrowed above and abruptly 
acuminate or long-attenuate, with a narrow acute acumen, thin, green above and glabrous, 
slightly paler beneath and when young thinly and loosely arachnoid-tomentose but soon glab- 
rous, the costa prominent beneath, the lateral veins slender, 5—9 on each side, arcuate, ascending 
at an angle of about 45°; inflorescence terminal and axillary, slender-pedunculate, the peduncles 
1.5—3.5 cm. long, thinly arachnoid-tomentose or glabrate, the flowers subsessile, in 2—3-flowered 
cymules, the cymules arranged in a spike-like panicle 6-10 cm. long; bractlets linear, elongate; 
hypanthium densely floccose-tomentose; calyx-lobes 4, lance-linear, unequal, equaling or longer 
than the hypanthium, deflexed, floccose-tomentulose or glabrate; corolla red, the tube slender, 
6-8 mm. long, glabrous outside below, floccose-tomentulose above, glabrous in the throat, 
the 4 lobes suborbicular, undulate, 2-3 mm. long; stamens and style included; capsule sub- 
globose, 4 mm. in diameter. 
TYPE LOCALITY: Chicharras, Chiapas, at an altitude of 920 to 1840 meters. 
DISTRIBUTION: Known only from the type locality. 
19. Rondeletia gracilis Hemsl. Diag. Pl. Nov. 53. 1880. 
Shrub, the branches slender or stout, terete or subangulate, grayish-brown, whitish-tomen- 
tose when young but soon glabrate; stipules triangular-cuspidate, 3-5 mm. long, erect, sub- 
persistent, thick, brown, glabrate; leaves opposite, the petioles stout, 0.3—-5.5 cm. long, tomen- 
