388 EUPHORBIACE^. (SPUEGE FAAIILY.) 



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

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



11. E. Heliosc6pia, L. (Sun Spurge.) Leaves all obovate and very 

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

 umbel 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 Alleghanies : 

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

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



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



stem-leaves oblong- or obowte-spatulate, 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 (Short), and southwestward. 



■»- -i- Seeds smooth and even : pod warty or rough. 



13. E. obtUSuta, 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-clcft to the middle, scarcely longer 

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

 Amer. auth. &• ed. 1.) 00 @? — Shady fertile woods, &c, Virginia to Illinois 

 and southward. July-Sept. 



13 a . E. platyphySSa, L. Differs from E. obtusata in having the 

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

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

 glands. — Niagara Falls, Vermont, &c. (Nat. from Eu.) 



14. E. Darlillgtdllii, 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. 1J. (E. nemoralis, Darl., not of Kit.) — Copses, &c, Penn. and south- 

 ward along the mountains. 



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



leaves entire : plant glabrous. ) 

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



15. E. Esula, L. Stems clustered (l°high); leaves lanceolate cr linear, 

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

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

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

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



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

 (£'-1' 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.) 



t- ■*- Seeds sculptured, ash-colored: root biennial or annual. 



