542 EUPHORBIACEAE (SPUKGE FAMILY) 



* Sterile flowers with ^-parted calyx, as many petals, a 4-rayed disk, and 8 



stamens' fertile flowers with ^-parted calyx, very minute rudimentary petals, 

 and the 3 styles 2-cleft. 



1. C. glandu!6sus L., var. septentrionalis Muell. Arg. Annual, rough- 

 hairy and glandular, 3-6 dm. high, somewhat umbellately branched; leaves 

 oblong or linear-oblong, obtusely toothed, the base with a saucer-shaped gland 

 on each side ; fertile flowers captitate-clustered at the base of the sterile spike, 

 sessile in the forks and terminal. Open waste places and sandy barrens, Va. 

 to Fla., and Tex. ; north w. in Miss, basin to Kan., la., 111., and Ind. ; rarely on 

 ballast northeastw. 



* * Sterile flowers with ^-parted calyx, as many glands alternating with the pet"!*, 



and 10-14 stamens ; fertile flowers with 1-12-parted calyx, no petals, and 

 the 3 styles twice or thrice 2-parted. 



2. C. capitatus Michx. Annual, densely soft-woolly and somewhat glandu- 

 lar, 2-6 or more dm. high, branched ; leaves long-petioled, lance-oblong or 

 elongated-oblong, rounded at base, entire ; petals obovate-lanceolate, densely 

 iimbriate ; fertile flowers several, capitate-crowded at the base of the short ter- 

 minal sterile spike. Barrens, N. J. to Fla. and Tex. ; northw. in Miss, basin to 

 Ind., 111., Mo., and Kan. July-Sept. 



* * * Sterile flowers with unequally 3-5-parted calyx, as many petals and scale- 



like glands, ami 3-8 stamens; fertile flowers with equally ^-parted calyx, no 

 petals, 5 glands, and 2 sessile 2-parted stigmas. 



3. C. monanth6gynus Michx. Annual, whitish-stellate-pubescent and rusty- 

 glandular ; stems 1.4-6 dm. high, slender, erect, below often umbellately 3-4- 

 forked, then repeatedly 2-3-forked or alternately branched ; leaves oblong-ovate 

 or narrowly oblong, entire, often acutish, 1.5-3 dm. long, about twice the length 

 of the petioles ; flowers in the forks, the sterile few on the summit of a short 

 and erect peduncle, the fertile few and clustered or mostly solitary on short 

 recurved peduncles ; ovary 2-celled ; fruit often by abortion 1-celled and 1- 

 seeded ; the seed broadly oval. Barren and dry prairies, s. Ind. to N. C. and 

 Fla., w. to la., e. Kan., and Tex. ; occasionally adv. northeastw. June-Sept. 



**** Dioecious; calyx equally o-parted; petals none; stamens 10 or more; 

 styles twice or thrice dichotomously 2-parted. 



4. C. texlnsis (Klotzsch) Muell. Arg. Annual, covered with a close canescent 

 stellate pubescence, dichotomously branched or spreading, 3-6 dm. high ; leaves 

 narrowly oblong-lanceolate to linear ; staminate spikes or racemes very short, 

 often sessile ; capsule stellate-tomentose and somewhat muricate. Sandy soil, 

 Del. (Commons); and from Ala. to Wyo., Col., Ariz., and Mex. ; rarely on 

 ballast northw. 



3. CROTON6PSIS Michx. 



Flowers monoecious, in very small terminal or lateral spikes or clusters, the 

 lower fertile. Ster. Fl. Calyx equally 6-parted. Petals 5, spatulate. Sta- 

 mi-ns "). opposite the petals; filaments distinct, inflexed in the bud, enlarged 

 at the apex. Pert. Fl. Calyx unequally 3-5 -parted. Petals imnt . (iland* 

 (petal-like scales) ">. opposite the sepals. Ovary 1-celled. simple, 1-ovuled. 

 bearing a twin- or tin ice forked style. Fruit dry and indehiscent, 1-seeded. 

 Seed without caruncle. A slender low annual, with short-petioled linear or 

 elliptical-lanceolate leaves, which are green and smoothish above, but silvery- 

 hoary with stellate hairs and scurfy with brownish scales underneath. (Crotmi 

 and tfi/as, (i/i/'t',ir<itifr, from likeness to Cmtnii..) 



1. C. linearis Michx. Fruit about ~1 nun. long. Dry sandy soil, s. Ct. 

 (Fames) to Pa., soiithw. near the coast to Fla. and Tex.; inland in Miss. 

 liasin to 111., Mo., and Kan. .July-Sept. 



