648 EUPHORBIACE^. 



TRAGIA, Plum. 



T. macroearpa, Willd. Hirsute; stem twining (2° -4° long); leaves 

 ample, thin, cordate, coarsely and sharply serrate, long-petioled ; racemes 

 shorter than the leaves ; capsule large. — Alabama, Tennessee, and westward. 



CROTON, L. 



C. Texensis, Miiller. Annual, dioecious, stellate-tomentose ; stem di- 

 ehotonious (l°-2° high); leaves lanceolate, short-petioled ; sterile racemes 

 short; petals none; fertile flowers axillary, solitary ; stigmas 18-24 ; capsule 

 nearly globose, covered with tufts of deciduous down; seed biconvex. — 

 Alabama (Mohr), and westward. 



C. capitatUS, Michx. Annual, monoecious, woolly ; stem umbellately 

 branched; leaves long-petioled, lance-oblong, rounded at the base; sterile 

 flowers numerous, the petals fimbriate ; fertile flowers crowded ; calyx 7 - 10- 

 parted, with tiie lobes obtuse; seed smootii. — Georgia, along railroads, and 

 westward. — Stem 2° -4° high. 



C. humilis, L. Low (1° high), shrubby, stellate-tomentose; leaves long- 

 petioled, cordate-ovate, acuminate; racemes densely 10-lo-flowered ; calyx 

 woolly, 5-parted ; petals of the sterile flower oblong; stamens 20-30; petals 

 of the fertile flower narrow-linear ; styles twice 2-parted ; capsule downy. 

 (C. Berlandieri, Torr.) — Florida [Cabanis). 



C. linearis, Jacq. Shrubby, canescent-tomentose, monoecious or dioe- 

 cious; stem slender, branching (3°-4° high); leaves short-petioled, linear- 

 lanceolate, obtuse ; sterile racemes slender, longer than the leaves, minutely 

 many -flowered, the fertile ones sliort, few-flowered ; styles 2-parted; capsule 

 roundish. — Miami, South Florida (Garber). 



C. Alabamensis, E. A. Smith (ined.). Stem tall, woody, much 

 branched ; leaves thin, short-petioled, oblong-lanceolate, mostly obtuse, 

 smooth or nearly so above, the lower surface, like the branchless and ra- 

 cemes, coated with silvery scales ; racemes often unioexual, few- or many- 

 flowered ; calyx-lobes 5, acute • petals of both sexes scarcely shorter than 

 the calyx, woolly-margined ; stamens 20 or more; styles simple, truncate or 

 emarginate ; capsule much longer than the calyx; seeds glabrous. — Central 

 Alabama, flowering throughout the year. — Stem 6° -10° high. Leaves 2'-B' 

 long. 



C. Betulinus, Vahl. Stellate-tomentose ; stem low (1°-1|^° high), with 

 slender branches ; leaves small (I' or less long), triangular-ovate, truncate 

 at the base, coarsely toothed, rough above, twice as long as the petiole ; 

 racemes bisexual ; stamens 10- 11 ; styles twice 2-cleft; capsule subglobose. 

 — Rocky pine woods. South Florida (Curtiss). 



JATROPHA, L. 



Flowers monoecious. Sepals 5, mostly united. Petals 5, or none. Glands 

 of the disk 5, opposite the calyx-lobes. Stamens monadelphous. Styles 3 



