EUPHORBIACEJ5. (SPURGE FAMILY.) 391 



5. STIL,L,tNGIA, Garden. STILLINGIA. 



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

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

 at the base : anthers adnate, turned outwards. Pert. 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. Stillingfleet.) 



1. S. sylvatica, 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. CROTON, L. CBOTON. 



Flowers monrecious, 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 5 - 20, distinct : anthers turned inwards. 

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

 them. Pert. 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 1-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. (Kpt>Ta>i/, 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. PILIN6PHYTUM, Klotzsch. Sterile flowers with the calyx ^-parted, 5 

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

 flowers with an unequally 8-cleft calyx and no petals ; the 3 styles twice or thrice 

 2-cleft. 



1. C. capitatuiil, Michx. Soft-woolly and somewhat glandular (i- 

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

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

 of the short terminal sterile spike, (I) Barrens of Illinois, Kentucky, and 

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



$ 2. GE1SELERIA, Klotzsch. Sterile flowers with a 4-parted calyx, 4 ovate- 

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

 calyx, and very minute awl-shaped rudiments of petals ; the 3 styles 2-cleft. 



2. C. glatidiilosuill, L. Bough-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. 

 Open waste places, Virginia, Illinois, and southward. July- Sept. 



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