434 EUPHORBIACE^E. (SPVRGR FAMTLT.) 



pednnrhd in a dichotomoiis inJJore.trence, mosdy with 5 obtuse glands : seeds icith- 

 out caruncle. 



3. E. Ipecacuanhse, L. Stems many from a very long perpendicular 

 root, erect or (lifTiistly spreading (5'- 10 long), forking from near the base; 

 leaves varying from obovatc or oblong to narrowly linear, almost sessile, gla- 

 brous ; peduncles elongated (^'-1' long) ; pod longpedicelled, obtusely angled, 

 nearly smooth ; seed ovate, white, sparsely marked with impressed dots. — Sandy 

 soil, near the coast, New York to Virginia and southward. May- July. 



» * Perennials or mostly annuals, with serrulate or rarely entire scattered leaves, only 

 the floral leaves in the unilieUiform inflorescence whorled or opposite and qfdifler- 

 enl shape: glands oftlie involucre mostly 4, transversely oval, obtuse. 

 ■*- iSecds smooth and even : pod warty or rough. 



14. E. Datlingt6nii, Gray. Tall perennial (2° -4° high); leaves entire, 

 minutely downy beneath ; those of the stem lanceolate-oblong from a narrow base ; 

 the floi-al ones oval, very obtuse ; the upper roundish-dilated with a truncate 

 base; umbel 5- 8-raycd, then simply forked; pod minutely warty ; large globular 

 seed with a small caruncle. (E. nemoralis, Z>ar/., not of Kitaibel.) — Copses, 

 Penn. and southward along the mountains. July -Sept. 



15. E. PLATYPiiYLLA, L. Ercct annual (8'- 18' high); upper stem-leaves 

 lanceolate-oblong, acute, cordate at base, minutely serrulate, mostly with scattered 

 hairs beneath ; floral ones triangular-ovate, subcordate ; umbel 5-raycd ; involucre 

 with ciliate lobes and large sessile glands ; styles longer than the ovary, united at 

 the base, slightly 2-cIpJI; pod covered with depressed warts. — Along the Great 

 Lakes and the St. Lawrence to L. Champlain. June -Aug. (Adv. from Eu.) 



16. E. obtUSkta, Pursh. Erect ann»a/ (1°- 2° high); leaves oblong-spatu- 

 lafe, minutely serrulate, smooth, all obtuse; upper ones cordate at base ; floral ones 

 ovate, dilated, barely mucronate ; umbel once or twice divided into 3 rays, then 

 into 2; involucre ivith naked lobes and small stipitate glands; styles distinct and 

 longer than the ovary, rcct, 2-rlefl to the middle; pod beset with long Avarts. — 

 Damp woods, Virginia to Illinois. May- July. 



-t- •*- Seeds rugose or rc*iculated : leaves serrulate: annuals. 



17. E. dictyosp6rma, Fischer & Meyer. Stem erect (8'- 18' high); 

 leaves oblong- or obovatc-spatulate, smooth, all obtuse and obtusely serrate; upper 

 ones cordate at base; floral ones roundish-ovate or obscurely heart-shaped, 

 slightly mucronate; umbels once or twice 3-forked, then 2-forked ; involucre 

 •with nearly naked lobes and sm«// almost sessile glands ; styles shorter than the 

 ovary, spreading or recurved ; pod warty ; seeds delicately reticulated. (E. Arkan- 

 skna, Engelm. ^- Gray.) — Prairies and roadsides, Kentucky (Short), and west 

 and southwcstward. May -July. 



18. E. Heliosc^pia, L. Stems ascending (6'- 12' high), stout; leaves all 

 dmvate and very rounded or retuse- at the end, flnely serrate, smooth or a little 

 hairy, those of the stem wedge-shaped ; umbel divided into 5 rays, then into 3, 

 or at length simply forked ; glands orbicular, stalked; jmd smooth and even; seeds 

 with coarse honeycomb like reticulations. — Waste places, especially eastward and 

 along the Great Lakes. July- Sept. (Nat from Eu.) 



