E UPHOKBIA CEA E. 593 



wrinkled. Throughout N. Am. except the extreme north. Apparently introduced 

 west of the Rocky Mts. June-Nov. 



n. Euphorbia humistrata Engelm. HAIRY SPREADING SPURGE. (I. F. f. 

 2315.) Light green, puberulent or sparingly pilose. Branches radiately pros- 

 trate, 1-3 dm. long; leaves ovate-oblong or obovate -oblong, or sometimes narrower, 

 4-15 mm. long, serrulate, at least above the middle, oblique, obtuse or subcordate 

 at the base; involucres in lateral clusters, split on one side, 2 mm. long, faintly 

 nerved, with 4 disk-like glands, and narrow irregular red or white appendages; 

 capsule depressed-globose, less than 2 mm. in diameter, its 3 lobes keeled; seeds 

 oblong, papillose, obscurely transversely wrinkled. Quebec to N. Y., Kans. and 

 Miss. Aug. -Oct. 



12. Euphorbia stictospora Engelm. NARROW-SEEDED SPURGE. (I. F. f. 

 2316.) Yellowish green, pilose. Branches radiating, 5-30 cm. long; leaves 

 oblong to suborbicular, 4-6 mm. long, obtuse, dentate-serrate at the apex, the bases 

 truncate or subcordate; involucres clustered, campanulate, i mm. high, with 4 

 cup-shaped glands, and inconspicuous appendages; capsule ovoid, 1-2 mm. in 

 diameter; seeds narrowly ovoid, pointed, pitted, gray or ash-colored, sharply 

 4-angled. S. Dak., Neb. and Colo, to Mex. June-Oct. 



13. Euphorbia Fendleri T. & G. FENDLER'S SPURGE. (I. F. f. 2317.) 

 Pale green, glabrous. Branches wiry, 1-2 dm. long, brittle ; leaves suborbicular, 

 oval or elliptic, 3-8 mm. long, obtuse, entire, the base oblique, obtuse or subcor- 

 date; involucres campanulate. 2-5 mm. high, with 4 or 5 saucer-shaped oval glands 

 and irregular appendages; capsule deflexed. 3 mm. in diameter, sharply 3-lobed; 

 seeds ovoid, wrinkled. Neb. and Colo, to Tex., Mex. and Ariz. April-Oct. 



14. Euphorbia lata Engelm. HOARY SPURGE. (I. F. f. 2318.) Pale 

 green, canescent. Base somewhat woody; branches 5-10 cm. long; leaves ovate to 

 lanceolate, 5-10 mm. long, revolute, abruptly narrowed, truncate or cordate at the 

 base; involucres solitary in the axils, I mm. long, bearing 5 disk like glands and 

 narrow appendages; capsule subglobose, 2 mm. in diameter; seeds oblong, acutish 

 at both ends, 4-angled, the faces inconspicuously transversely wrinkled. Kans. to 

 Tex. and N. Mex. 



15. Euphorbia nutans Lag. LARGE OR UPRIGHT SPOTTED SPURGE. (I. F. 

 f. 2319.) Deep green. Stem 2-6 dm. high, the branches mostly spreading; leaves 

 opposite, oblong, or linear-oblong, varying to ovate or obovate, often falcate, 

 oblique, 3 -nerved, unequally serrate, often with a red blotch and red margins; 

 involucres narrowly obovoid, I mm. long, bearing 4 glands subtended by orbicular 

 orreniform white or red appendages; capsule glabrous, 2 mm. in diameter; seeds 

 oblong-ovoid, 4-angled, with broken transverse ridges. In fields and thickets, 

 throughout eastern N. Am. except the extreme north, extending west to the Rocky 

 Mts. May-Oct. 



16. Euphorbia hexagona Nutt. ANGLED SPURGE. (I. F. f. 2320.) Yel- 

 lowish green. Stem striate- angled, 1-5 dm. tall, the branches ascending, often 

 almost filiform; leaves opposite, linear, oblong or lanceolate, equilateral; involucres 

 solitary in the axils, often clustered, 2-3 mm. long, ciliate, pubescent, with 5 

 glands subtended by triangular-ovate whitish or green appendages; capsule gla- 

 brous, 4mm. in diameter; seeds ovoid or oblong-ovoid, terete, papillose. Iowa to 

 Mont., Tex. and Colo. Also at Wilmington, Del. June-Oct. 



17. Euphorbia Marylandica Greene. MARYLAND SPURGE. Perennial, 

 glabrous, pale green, glaucescent. Stems trichotomous near the base, thence 

 bushy, 3-4 dm. tall, the branches dichotomous ; leaves linear to linear-lanceolate. 

 2-3.5 cm - l n g> acute, opposite above the whorl of 3 at the first fork; involucres 

 hemispheric, nearly 2 mm. high; appendages white, suborbicular to reniform. On 

 sand hills, Anne Arundel Co., Md. Summer. 



18. Euphorbia corollata L. BLOOMING OR FLOWERING SPURGE. (I. F. f. 

 2321.) Perennial by a long stout rootstock. Stem erect, 2. 5-9 dm. tall, umbel- 

 lately branched above; leaves linear, oblong or oblong-spatulate, 24 cm. long, 

 entire, short petioled or sessile, the lower scattered, those subtending the umbel ver- 

 ticillate; bracts ovate to linear, green; involucres mostly terminal, less than 2 mm. 

 long, bearing 4 or 5 yellowish green oblong glands subtended by white petal-like 

 cuneate or orbicular-cuneate appendages; capsule erect, subglobose, 2-4 mm. in 



