Part 1, 1918] RUBIACEAE 15 
3. Isidorea (?) cubensis Standley, sp. nov. 
Shrub, 3-6 dm. high, the branches slender, dark-brown, the branchlets slender, terete or 
subangulate, minutely hirtellous, the internodes shorter than the leaves; stipules minute; 
petioles stout, 1-2 mm. long, short-hirtellous; leaf-blades lanceolate or narrowly lanceolate, 
broadest at the base, 7-14 mm. long, 3-4 mm. wide, obtuse or acutish at the base, gradually 
narrowed to the acute apex, coriaceous, green above, very lustrous, scaberulous or glabrate, 
the costa impressed, brownish beneath, somewhat lustrous, scaberulous, the costa prominent, 
the lateral veins prominent, the margins strongly revolute; flowers solitary, terminal, sessile or 
subsessile; calyx-lobes 5 or 6, in fruit linear-subulate, 10-12 mm. long, acute, minutely hir- 
tellous, erect; fruit pyriform-obovoid, 8-12 mm. long, brown, minutely hirtellous. 
Type collected among rocks, near water, Arroyo del Medio, above the falls, Oriente, Cuba, 
altitude 450 to 550 meters, January, 1910, 7. A. Shafer 3230 (herb. N. Y. Bot. Gard.). 
7. POGONOPUS Klotzsch, Monats. Akad. Berlin 1853: 500. 
1853. 
Chrysoxylon Wedd. Monog. Cinch. 100. 1849. Not Chrysoxylon Casar. 1843. 
Howardia Wedd. Ann. Sci. Nat. IV. 1:66. 1854. 
Trees or shrubs. Leaves opposite, petiolate, the blades large, thin. Stipules interpetiolar, 
small, cuspidate, tardily deciduous Flowers showy, pedicellate, in small cymes, these arranged 
in lax terminal panicles, the pedicels bracteolate at the base; hypanthium turbinate; calyx 
short, 5-dentate, deciduous, one of the lobes expanded into a large petiolate foliaceous bright- 
colored limb; corolla tubular, the tube villous in the throat, the limb short, 5-lobate, the lobes 
valvate. Stamens 5, inserted in the corolla-tube, the filaments slender, glabrous; anthers 
versatile, linear-oblong, exserted. Disk thick, annular. Ovary 2-celled; style slender, with 
2 linear or oblong obtuse branches; ovules numerous, the placentae bifid, longitudinally adnate 
to the septum. Capsule subligneous, areolate at the apex, 2-celled, loculicidally bivalvate, 
many-seeded. Seeds horizontal, crowded, the testa thick; endosperm fleshy; embryo large, 
the cotyledons ovate, the radicle thick. 
Type species, Pogonopus Ottonis Klotzsch. 
1. Pogonopus speciosus (Jacq.) K. Schumann, in Mart. FI. Bras. 6°: 
265.2 S89- 
Macrocnemum speciosum Jacq. Hort. Schoenb. 1:19. 1797. 
Mussaenda speciosa Poir. in Lam. Encyc. Suppl. 4:37. 1816. 
Mussaenda acutiflora Bartl.; DC. Prodr. 4: 370. 1830. 
Macrocnemum exsertum Oerst. Vidensk. Meddel. 1852: 45. 1852. 
Pogonopus Ottonis Klotzsch, Monats. Akad. Berlin 1853: 500. 1853. 
Howardia caracasensis Wedd. Ann. sei. Nat. IV. 1:71. 1854. 
Calycophyllum tubulosum Seem. Bot. Voy. Herald 135. 1854. Not C. tubulosum DC. 1830. 
Pogonopus exsertus Oerst. Am. Centr. 17. 1863. 
Pogonopus caracasensis Nichols. Dict. Gard. 3: 175. 1886. 
Chrysoxylon speciosum Kuntze, Rev. Gen. 278. 1891. 
Shrub or small tree, up to 10 meters high, the branches reddish-brown or grayish, con- 
spicuouslyle nticellate, the branchlets slender, cinereo-puberulent or short-hirtellous, some- 
times glabrate; stipules triangular, 3-5 mm. long, cuspidate, puberulent; petioles stout, 2 cm. 
long or shorter, semiterete, shallowly sulcate on the upper surface, puberulent; leaf-blades 
obovate, oval-obovate, or rarely elliptic or ovate, 5-23 cm. long, 2-11 cm. wide, those of the 
inflorescence much reduced, abruptly acuminate or attenuate at the apex, abruptly or gradu- 
ally acute to long-attenuate at the base, thin, green above, glabrous or sometimes puberulent, 
paler beneath and sparsely or densely puberulent, the costa slender, prominent, the lateral 
veins slender, prominent, 8-13 on each side, arcuate, laxly anastomosing near the margin; 
cymes few-flowered, arranged in a broad leafy panicle; bracts foliaceous or linear; pedicels 
stout, 1 cm. long or shorter, puberulent or pilose, the bractlets minute; hypanthium 4-5 mm. 
long, puberulent or densely fulvous-sericeous; calyx about 1 mm. high, 4 of the lobes 
minute, cuspidate, the fifth expanded into a large limb, this rounded-ovate, 1-5 cm. long, 
1-4 cm. wide, on a slender petiole 1—2.5 cm. long, rounded to acute at the apex, rounded and 
short-decurrent at the base, purplish, palmately 5-nerved, the nerves very prominent, the 
