Part 1, 1918] RUBIACEAE 45 
these affixed to the septum. Capsule small or large, usually globose, rarely pyriform or oblong, 
bisulcate, chartaceous or coriaceous, 2-celled, loculicidally or septicidally bivalvate, the valves 
usually bipartite, usually many-seeded. Seeds commonly minute, compressed or angulate, 
sometimes fusiform, often winged, sometimes appendaged at each end, the testa thin; endo- 
sperm fleshy; embryo minute, clavate. 
Type species, Rondeletia americana L. 
Inflorescence terminal, or terminal and axillary. 
Corolla densely yellow-barbate in the throat; stipules usually foliaceous 
and reflexed; flowers 5-parted; seeds mostly exalate. Mexican and 
Central American. I. AMOENAE. 
Corolla usually naked in the throat, never yellow-barbate; stipules 
mostly narrow and erect. 
Capsule globose or pyriform, little if at all longer than broad. 
Inflorescence an elongate, spike-like panicle; flowers 4-parted; 
seeds exalate. Mexican and Central American. III. LANIFLORAE. 
Inflorescence various, but never an elongate spike-like panicle. 
Corolla arachnoid-tomentulose outside; leaves white-tomen- 
tose beneath; flowers 4-parted; seeds exalate. Mexican and 
Central American. II. LEUCOPHYLLAE. 
Corolla not arachnoid-tomentose outside. 
Inflorescence few- or many-flowered, the pedicels short. 
Flowers 4-parted. 
Seeds exalate; leaves acuminate, membranaceous. 
Mexican and Central American. IV. CALYcosAk. 
Seeds alate; leaves acute to rounded at the apex, 
coriaceous. West Indian. VI. STELLATAE. 
Flowers 5-parted. 
Leaves white-tomentose beneath; corolla 2—2.5 cm. 
long. Central American. V. HONDURENSES. 
Leaves never white-tomentose; corolla less than 
2 cm. long. 
Corolla glabrous outside. West Indian. VI. STELLATAE. 
Corolla pubescent outside. West Indian and 
Central American. IX. ODORATAE. 
Inflorescence 1—3-flowered, the pedicels very long; leaves 
small, coriaceous; flowers 4- or 5-parted; seeds exalate, 
often appendaged at each end. Cuban. VIII. PEDICELLARES. 
Capsule linear-oblong, cylindric, several times as long as broad; 
leaves coriaceous; flowers 4-parted; seeds appendaged ateachend. VII. TINIFOLIAE. 
Inflorescence axillary. 
Capsule globose or subglobose, less than 1 cm. in diameter. 
Flowers 5-parted. 
Inflorescence cymose-paniculate, usually many-flowered, the 
flowers never capitate. West Indian. X. LAURIFOLIAE. 
Inflorescence never cymose-paniculate, 1—3-flowered, or many- 
flowered and the flowers collected into 1-3 dense heads. 
Flowers numerous, in 1-3 dense heads, rarely solitary, the 
bracts large; stipules usually large and thin; corolla-tube 
antrorse-pilose. Jamaican. XI. UMBELLULATAE. 
Flowers usually 1-3, the bracts small; stipules small, thick; 
corolla-tube usually retrorse-pilose. West Indian. XII. INCANAE. 
Flowers 4-parted; corolla-tube retrorse-pilose. 
Leaves loosely pilose beneath. West Indian and Mexican. XIII. Prosak. 
Leaves white or grayish beneath, at least when young, with a 
fine close tomentum. West Indian. XIV. HyPpoLEucAE. 
Capsule pyriform, about 1.5 cm. long; flowers 5—6-parted; seeds exalate. 
Cuban. XV. CORREIFOLIAE. 
I. AMOENAE 
Corolla glabrous outside. 
Calyx-lobes foliaceous, several times as long as the hypanthium; 
flowers few; leaves setose-pilose beneath. 1. R. suffrutescens. 
Calyx-lobes minute, shorter than the hypanthium; flowers very nu- 
merous; leaves glabrous beneath except for tufts of hairs in the axils 
of the veins. 2. R. ligustroides. 
Corolla pubescent outside. 
Branches acutely quadrangular; petioles 5-13 mm. long; leaf-blades 
usually acute at the base. 3. R. stenosiphon. 
Branches terete or subangulate; petioles very short; leaf-blades sub- 
cordate to obtuse at the base. 
Leaves ternate; flowers capitate. 4. R. strigosa. 
Leaves opposite; flowers cymose-paniculate. 
Calyx-lobes linear-subulate, attenuate. 5. R. Ehrenbergit. 
Calyx-lobes deltoid to oblong, obtuse or acutish. 
Stipules triangular-subulate, 4-6 mm. long. 6. R. gratissima. 
