648 EUPHORBIACE^E. 



TBAGIA, Plum. 



T. macrocarpa, 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- 

 chotomous (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 the lobes obtuse; seed smooth. 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 10-15-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 short, 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 branchlets and ra- 

 cemes, coated with silvery scales ; racemes often unisexual, 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' - 3' 

 long. 



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

 slender branches ; leaves small (!' 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 



