EUPHORBIACE^. (SPXIEGE FAMILY.) 391 



5. STIL,L.i]VOIA, Garden. Stilungia. 



Flowers monoecious, aggregated in a terminal spike, apetalous. Star. Fl. 

 Calyx a 2-cleft or crenolate little cup. Stamens 2 : filaments elongated, united 

 at the base : anthers adnate, turned outwards. Fert. Fl. Calyx 3-toothed or 

 cleft. Style thick : stigmas 3, diverging, simple. Pod 3-celled, 3-lobed, 3-seed- 

 ed. — Smooth upright plants, with the alternate leaves mostly 2-glandular at 

 the base ; the fertile flowers few at the base of the dense sterile spike (rarely 

 separate) ; the bract for each cluster with a. gland on each side. (Named for 

 Dr. B. StiUinafleet.) 



1. S. sylv&tica, L. Herbaceous (2° -3° high); leaves almost sessile, 

 oblong-lanceolate, serrulate ; glands of the spike saucer-shaped. — Sandy. and 

 dry soil, Virginia and southward. June. 



6. CRbTOlV, L. Croton. 



Flowers monoecious, spiked or glomerate. Ster. Fl. Calyx 5-parted, rarely 

 4-parted, valvate in the bud. Petals as many as the divisions of the calyx, 

 mostly small, hypogynous. Stamens 6 - 20, distinct : anthers turned inwai'ds. 

 Glands or lobes of the central disk as many as the calyx-lobes and opposite 

 them. Fert. Fl. Calyx 5- (rarely 8-) cleft or parted. Petals often none or 

 minute. Glands or disk as in the sterile, or none. Ovary 3-celled, rarely 2- 

 celled, with as many styles, which are from once to thrice 2-cleft. Pod 3- (rarely 

 2-) celled and lobed, separating into as many 2-valved I-seeded carpels. — Stel- 

 late-downy, or scurfy, or hairy and glandular plants, mostly strong-scented; 

 the sterile flowers above ; the fertile below, usually at the base of the same spike 

 or cluster. Leaves alternate, or sometimes imperfectly opposite. (TLporav, the 

 Greek name of the Castor-oil Plant, of this family.) — The following have been 

 made into as many genera by Klotzsch, apparently without sufficient reason. 



§ 1. PILmdPHYTUM, K\oUseh. — Stmle flowers with the cUlyx 5-parted, 5 

 glands alternate with the petals, and 10-12 stamens on the hairy receptacle : fertile 

 flovKre with an unequatty S-deft calyx and no petals ; the 3 styles twice or thrice 

 2-cleft. 



1. C. capitsktum, Michx. Soft-woolly and somewhat glandular (1°- 

 2° high), branched ; leaves very long-petioled, lance-oblong or elongatedroblong, 

 rounded at the base, entire ; fertile flowers several, capitate-crowded at the base 

 of the short terminal sterile spike. (J) — Barrens of Illinois, Kentucky, and 

 southward. Pine barrens of New Jersey, Enieskern ! July - Sept. 



§ 2. GEISELEB.IA, Klotzsch. — Sterile flowers with a 4-parted calyx, i ovate- 

 lanceolate petals, a 4-rayed dish, and 8 stamens : fertile flowers with a 5-parted 

 calyx, and very minute awl-shaped rudiments of petals ; theS styles 2-cleft. 



2. C. glaildnldsuill, L. Kough-hairy and glandular (l°-2° high), 

 somewhat umbellately branched ; leaves oblong or linear-oblong, obtusely 

 toothed, the base with a saucer-shaped gland on each side ; fertile flowers capi- 

 tate-clustered at the base of the sterile spike, sessile in the forks and terminal, 

 (ip — Open waste places, Virginia, Ulinois, and southward. July - Sept. 



