EUPHORBIA, SECTION TITHYMALUS. 99 
** Annual or biennial or perhaps sometimes perennial by crown buds; 
rays 5 or less; glands usually 4, transversely elliptical or sub- 
reniform; seeds lenticular or reticulate. 
* Capsules verrucose; seeds lenticular. 
++ Leaves more or less pubescent; rays usually 5; seeds smooth, 
shining, a circular depression at the cha!aza, 
E. PLATYPHYLLA Linn. Sp. Plant. 460. 1753; Boiss. DC. 
Prod. 15?:133; Brit. & Brown, Ill. Flora 2:378. 
1897; Gray, Man. 405. 1848. (in part), 434. 1868. 
[5th ed.]; Macoun, Cat. 425. 1886; Hook. Flor. 
Bor.-Am. 2: 140. 1840. (?). Tithymalus platyphyl- 
los Hill, Hort. Kew. 172 (4). 1768; Scop. Fl. Carn. 
1:337. 1772. [2d ed.]. #. verrucosa Huds. Flor. 
Ang. 209. 1798. #. lanuginosa Thuill. Flor. Paris. 
238.1799. [2ded.]. L. subciliata Pers. Syn. 2:18. 
1807. Galarhoeus platyphyllus Haw. Pl. Suc. 151. 
1812. #. Coderiana DC. Flor. Frang.6 : 865. 1815. 
E.. pilosa Torr. Compend. Flor. North. and Mid. 
States 332. 1826. (?). H. obtusata Gray, Man. 388. 
1857. (in part); Macoun, Cat. 426. 1886. (?). #. 
Tannensis Hort. Boiss. in DC. Prod. 157: 133. 1862. 
E. foetida Schult. in Steud. Nom. 1841. (fide Boiss. 
DC. Prod. 15?:133 1862). HH. paniculata Tenore, 
Prod. Fl. Nap. Ixviii. (fide Index Kewensis). — Brit. 
& Brown, Il. Flora f. 2330; Pammel, Seed-coats pl. 
12, f. 17a; Reichenb. Ic. Fl. Germ. f. 4758. 
Stem single, erect, strictly annual, sparingly branched 
below the umbel and sometimes at the base, 1.5 to 5 dm. 
high; rays 5, rarely 3 or 4, dichotomously or at first umbel- 
lately branched, then many times dichotomous; primary 
rays 2 to 10 cm. long, stem leaves oblanceolate spatulate, 
acute, or the lower obtuse and obovate, spreading or reflexed, 
subcordate to petiolate at base, serrulate above, 1.5 to 5 
em. long, 5 to 10 mm. wide; umbel leaves oblong; floral 
leaves triangular ovate, mucronate, subcordate, about 1 
em. long and wide; involucre 2 mm. high, pubescent 
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