RUBIACEAE. 173 



Petals united to alxtve the middle : stamens as many as the corolla-lobes and oppo- 

 site them : drupe nearly enclosed in the disk. 1. Schoepfia. 



Petals nearly distinct : stamens twice as many as the petals : drupe 



naked. 2. XrMEM.\. 



1. SCHOEPFIA Schrel). I'liarnied shrults or trees. Leaf-blades thick. 

 Hypaiithiuiii lillcd with an elevated disk. Sejials broad. Corolla campanulate. 

 Anthers oval or ovoid. Ovary about i inferior. 



1. S. chrysophylloides (A. Rich.) Planch. Shrub or small tree, with pale 

 branches: Icaf-lilados ovate to oblong-ovate, 2-G cm. long: corolla red or 

 greenish, about 4 mm. long; lobes ovate, glabrous: drupes ovoid or oval-ovoid, 

 10-12 mm. long. [S. Schrcberi Small. Not J. F, Gmel.]— Hammocks,— F. K. 

 (Bah., Cuba, Ant.) — Whitewood. 



2. XIMENIA [Plum.] L. Thorny shrubs or trees. Leaf -blades thick. 

 Hypanthium without an elevated disk. Sepals minute. Corolla rotate. 

 Anthers linear. Ovary nearly superior. 



1. X. americana L. Shrub or small tree, with dark branches: leaf -blades 

 oblong to elliptic or nearly so, 3-7 cm. long: corolla about 10 mm. long; lobes 

 linear, densely pubescent within : drupes subglobose or broadly oval, 14-17 

 mm. long. — Pinelands, hammocks and coastal sand-dunes. — F. K. {Bah., 

 Cuba, Ant.) — Tallow- wood. 



Order RUBIALES. 



Herbs, shrubs, or trees. Leaves opposite, sometimes whorled. Flowers 

 perfect or polygamous, axillarj' or cymose. Hypanthium present. Calyx 

 of 2 or more, often small, sepals. Corolla of 3 or more partially united 

 petals. Androeeium of as many stamens as there are corolla-lobes or twice 

 as many. Gynoeeium 2-several-carpellary. Ovary wholly or partially 

 inferior. Fruit a capsule, a beriy, or a drupe. 



Leaves with stipules adnate to the stems between the leaf-bases. 



Fam. 1. RtJBiACEAE. 

 Leaves without stipules, or if present these adnate to the 



petiole. Fam. 2. Caprifoliaceae. 



Family 1. RUBIACEAE. Madder Family. 



Herbs, shrubs, trees, or vines. Leaves opposite or whorled with 

 interpetiolar stipules. Flowers perfect or polygamous, regtilar or nearly 

 so. Calyx of 2-6, or more, sepals surmounting the hyj^anthium, or obso- 

 lete. Corolla of 3-6, or more, partially united petals. Androeeium of as 

 many stamens as there are calyx-lobes and alternate with them. Gynoe- 

 eium 2-several-carpellary. 

 Seeds wingless : anthers and filaments short : ovary and hypanthium short. 



1. IIOUSTOMA. 



Seeds winged: anthers and filaments long: ovary and hypan- 

 thium long. 

 Cavities of the ovary with several or many ovules : seeds 

 several or many. 

 Fruit dry. 2. Exostema. 



Fruit pulpy. 



Fruit 2-celled. 



Flowers in cymes. .1. Pasasia. 



Flowers solitary. 4. Ranpia. 



Fruit 5-celled. 5. Hamelia. 



Cavities of the ovary with a single ovule each : seed 

 solitary. 



