392 EUPHORBIACE^. (SPUBGE FAMILY.) 



§3. GYNAMBLOSIS, Torr. (Engelmannia, Klotzsck.) — Sterile flowers with 

 a 5- (sometimes 3 -4-) parted calyx, and as many petals and scale-like glands oppo- 

 site the latter, the stamens varying from 5 to 10 : fertile flowers with a 5-parted 

 calyx, no petals, 5 glands, and u, 2-celled ovary, crowned with 2 sessile 2-parted 

 stigmas; the fruit 2-seeded, or often by abortion l-seeded. (This may perhaps 

 rank as a genus.) 



3. C. monanthdgynum, Michx. Repeatedly 3-2-forkea into di- 

 verging branches, stellately pubescent ; leaves silvery-woolly beneath, ovate- 

 elliptical or oblong, often a little heart-shaped at the base, entire, on slender 

 petioles ; flowei-s in the forks, the sterile few on the summit of a short erect pe- 

 duncle, the fertile few and clustered or mostly solitary on short recurved pedun- 

 cles. ® {0. elli'pticum, Nutt. Engelmannia Nuttalliana, Klotzsch, Gynam- 

 blosis monanthogyna, Ton:) — Barrens and dry prairies, from Illinois and 

 Kentucky southward and westward. June - Sept. 



7. CBOTONOPSIS, Michx. Ckotonopsis. 



Flowers monoecious, axillary along the branches, and terminal, the lower fer- 

 tile. Ster. Fl. Calyx 5-parted. Petals and stamens 5 : filaments distinct, 

 enlarged at the apex. Pert. Fl. Calyx 3 - 5-parted. Petals none. Petal-like 

 scales 5, opposite the sepals. Ovary l-celled, 1-ovuled : stigmas 3, each 2- 

 lobed. Fruit dry and indehiscent, small, l-seeded. — A slender low annual, 

 with alternate or opposite short-petioled linear or lanceolate leaves, which are 

 green and smoothish above, but silvery hoary with starry hairs and scurfy with 

 brownish scales underneath, as well as the branches, &c. (Name compounded 

 of Kparav, and oi/ftr, appearance, for a plant with the aspect of Croton.) 



1. C. linearis, Michx. — Pine barrens of New Jersey (Knieslcern) to Vir- 

 ginia, Kentucky, and southward. July- Sept. — Flowers sessile, small. 



§. PHYLtliANTHUS, L. Phyllanthus. 



Flowers monoecious, axillary. Calyx 5-6-parted. Petals none. Ster. Fl. 

 Stamens 3 : filaments united in a column, surrounded by 5 - 6 glands or a 5 - 6- 

 lobed glandular disk. Fert. Fl. Ovary 3-celled ; the cells 2-ovuled : styles 3, 

 each 2-cleft : stigmas 6. Pod depressed, separating into 3 cai-pels, which split 

 into 2 valves. — Leaves alternate, with small stipules. (Name composed of 

 (j)vWov, leaf, and avBos, blossom, because the flowers in some species [not in 

 ours] are borne upon what appear like leaves. ) 



1. P. Carolinensis, Walt. Annual, low and slender, branched ; leaves 

 2-rankcd, obovate or oval, short-petioled; flowers commonly 2 in each axil, 

 almost sessile, one staminate, the other fertile. — Gravelly banks ; W. Penn. to 

 Illinois and southward. July - Sept. 



9. PACHYSANDRA, Michx. Pachtsandea. 

 Flowers monoecious, in naked .spikes. Calyx 4-parted. Petals none. Ster. 

 Fl. Stamens 4, separate, surrounding the rudiment of an ovary : filaments 

 long-exserted, thick and flat : anthers oblong-linear. Fert. Fl. Ovaiy 3-cellcd ; 



