388 EUPHOEBIACE^. (spurge FAMILY.) 



# * Glands of the involucre entire, not appendaged : involucres nearly sessile. 

 H- Seeds rugose or reticulated : leaves serrulate : annuals. 



11. E. Helioso6pia, L. (Sun Spdkge.) Leaves all oiovate and very 

 rounded (or retuse) at the end, find)/ serrate, those of the stem wedge-shaped; 

 uvnbel divided into 5 rays, then into 3, or at length simply forked ; glands orbic- 

 ular, stalked ; pod smooth and even. — Waste places, east of the AUeghanies : 

 rather scarce. July -Sept. — Kather stout, branched from the root, 6'- 12' 

 high, smooth or a little hairy. (Nat. from Eu.) 



12. E. ArkailSana, Engelm. & Gr. Slender, very smooth throughout ; 

 stem-leaves oblong- or oiovate-spatuiate, those of the flowering branches roundish-ovate 

 or slightly heart-shaped, very obtuse ; umbels once or twice 3-forked, then 2- 

 forked; glands oval, almost sessile; pod warty; seeds reticulated. — Lexington, 

 Kentucky (Sliort), and southwestward. 



■f- -t- Seeds smooth and even : pod warty or rough. 



13. E. obtusata, Pursh. (Waktbd Spdkge.) Leaves all obtuse, mi- 

 nutely serrulate, smooth ; those of the stem oblong-spatulate, the uppermost and 

 bracts dilated-ovate and barely mucronate ; umbel once or twice divided into 

 3-5 rays, then into 2 ; glands oval ; styles 2-cleft to the middle, scarcely longer 

 than the ovary, which is warty with cylindrical projections. (E. platyphylla, 

 Amer. auth. ^ ed.l.) ®@? — Shady fertile woods, &c., Vermont to Virginia, 

 and common westward. July- Sept. — The representative of the European E. 

 platyphylla, which has the upper leaves acute, the upper bracts cuspidate, the 

 styles 2-lobed at the apex only, and much longer than the ovary, wliich is warty 

 with hemispherical glands. [The difference in the styles appears to be not 

 altogedier constant.] 



14. E. Darlingtonii, Gray. Tall (2° -4° high); kaves entire, minutely 

 downy beneath ; those of the stem lanceolate-oblong, the lower floral ones oval, 

 very obtuse, the upper roundish-dilated with a truncate base ; umbel 5-8- 

 rayed, afterwards simply forked ; glands obliquely oval, sessile ; pod obscurely 

 warty. 1|. (E. nemoralis, Darl., not of Kit.) — Copses, &c., Penn. and south- 

 ward along the mountains. 



* * * Glands cf the involucre crescent-shaped or 2-hxfmed, naked. {Stems erect: 



leaves entire : plant glabrous.) 



■>-. Seeds smooth, blackish or dull : perennials, with running rooislocks. 



15. E. ifesuLA, L. Stems clustered (l°high); leat^es lanceolate or linear; 

 the floral (yellowish) broadly heart-shaped, mucronate; umbel divided into many 

 rays, then forking; also with scattered flowering branches below ; glands short- 

 horned (brown) ; pods smoothish. — Essex County, Massachusetts, Oakes : likely 

 to become a troublesome weed. June. (Adv. from Eu.) 



16. E. CYPAKfssiAS, L. (Cypress Spurge.) Stems densely clustered 

 (J'-l' high); stem-leaves linear, crowded, the floral ones heart-shaped; umbel 

 many-rayed, and with some scattered flowering branches below ; glands crescent- 

 shaped ; pods granular. — Escaped from gardens to road-sides, in a few places 

 in New England. (Adv. from Eu.) 



■1- H- Seeds sctdptured, ash-cohred: root biennial or anmud. 



