388 EUPHORBIACE^E. (SPURGE FAMILY.) 



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

 - Seeds rugose or reticuUited : leaves serntlate : annuals . 



11. E. IlELiosc6riA, L. (SuN SPURGE.) Leaves all obovate and very 

 rounded (or rctuse) at the end, finely serrate, those of the stem wedge-shaped ; 

 umbel divided into 5 rays, then into 3, or at length simply forked ; (/lands orbic- 

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

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

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



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

 si < in-lc<i res oblo/ty- or ubovate-spatulate, those of the flowering branches roundish -ovate 

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

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

 Kentucky (Short), and south westward. 



H- *- Seeds smooth and even : pod warty or rowjh. 



13. E. Obtlisata, Pursh. (WARTED SPURGE.) 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, 

 Atner. auth. & ed. 1.) CD ? Shady fertile woods, <fec., Virginia to Illinois 

 and southward. July-Sept. 



13 ft . E. platyphylla, L. Differs from E. obtusata in having the 

 upper leaves acute, the upper bracts cuspidate, the styles 2-lobed at the apex 

 only, and ranch longer than the ovary, which is warty with hemispherical 

 glands. Niagara Falls, Vermont, <fcc. (Nat. from Eu.) 



.14. E. DarlingtOllii, Gray. Tall (2 -4 high); leaves 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. It (E. nemoralis, Darl., not of Kit.) Copses, &c., Feim. and south- 

 ward along the mountains. 

 * * * Glands of the involucre crescent-shaped or 2-horned, naked. (Stems erect: 



leaves entire: plant glabrous.) 

 t- Seeds smooth, blackish or dull : perennials, with running rootstocks. 



15. E. ESULA, L. Stems clustered (lhigh); leaves lanceolate or Ihuar, 

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

 rays, then forking ; also with scattered flowering branches below ; (/lands short- 

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

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



16. E. CvpARfssiAS, L. (CYPRESS SPURGE.) Stems densely clustered 

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

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

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

 iu New England. (Adv. from Eu.) 



*- i- Seeds sculptured, asJi-colared : root biennial or annual. 



