62ft ORDER 112. EUPHORBIACE^E. 



2 E. Cyparissias L. CYPRESS SPURGE. Lvs. linear-setaceous, crowded on the 

 stem, with a spiral arrangement ; floral Ivs. broadly cordate, all sessile ; umbel of 

 many simple rays, with several scattered branches below it ; glands crescent-shaped; 

 fr. granulated. Gardens and fields, rare. Sts. much branched, ascending If high, 

 with numerous leaves 6 to 10" long, less than 1" wide, the floral yellowish, very 

 different. Eur. 



3 E. Esula L. Los. lanceolate-linear, the floral broadly cordate, mucronate, umbel 

 of many rays, the rays forked, with scattered branches below it ; glands 2-horned; 

 fruit nearly smooth. Fields, Mass. (Oakes), not common. Sts. much branched, 

 If high. Lvs. 1' or more long, the floral yellowish. Glands brown. Eur. 



4 E. Peplus L. Lvs. membranous, roundish, tapering into the petiole, very obtuse, 

 entire, smooth, the upper floral ovate ; umbel of 3, rarely 5 rays, then forked ; 

 glands lunate, with 2 long horns ; ovaries with a double-winged keel at the back, 

 rugous and scabrous ; seed dull grayish white, with 2 longitudinal furrows and 4 

 rows of dots. Waste places, X. Eng., rare. St. 7 to 12' high. Eur. 



5 E. commutata Engelm. Decumbent and branched at base, smooth; sts. erect; 

 lower Ivs. oval, petiolato ; floral Ivs. numerous, thin, broader than long, all sessile, 

 very obtuse ; ovaries obtusely angled, not winged, seeds dotted all over. If Along 

 streams, "W. Va. to Ohio, 111. frequent, and S. to Fla. Sts. a foot high, once or 

 twice trichotomous, the floral Ivs. so applied at base as to appear orbicular and 

 perfoliate, C to 9" diam. Horned glands usually but 4. Has been confounded 

 with E. Peplus. Jn. 



6 E. Lathyris L. MOLE-TREE. CAPER SPURGE. St. erect, stout, smooth ; Ivs. 

 lance-linear, rather acute, entire, glabrous, sessile ; umbel mostly 4-rayed, rays 

 dichotomous; glands of the invol. lunate, 2-horned, the horns dilated and obtuse. 

 (g) Cultivated grounds and gardens. Stem 2 Bf high. Leaves 2 4' by 3 9", 

 numerous and arranged in 4 rows on the stem. Umbel of 4 verticillate branches 

 with a central subsessile head. JL Sept. Eur. Supposed efficacious in ex- 

 pelling moles from the ground. 



7 E. marginata Pursh. Lvs. oblong-lanceolate, subcordate, sessile, acute, mu- 

 cronate, entire on the margin, glabrous ; umbel 3-rayed, once or twice dichoto- 

 mous ; involucrato Ivs. oblong, cordate, colored and membranaceous at the mar- 

 gin ; inner segments of the floral involucre roundish ; caps, hoary -pubescent. CD 

 A handsome species, remarkable for the variegated leaves of the involucre, f 

 Shores of tho Ky. River at Paris, abundant. Doubtless escaped from the gar- 

 dens. Native in Nebraska. 



8 E. mercurialina MX. Sts. slender, weak, simply trichotomous; Ivs. opposite 

 or ternately whorled, nearly sessile, oval, entire ; ped. terminal, solitary, bearing a 

 single involucre. 2 Near Knoxville, Tenn. Jl., Aug., (Michaux). A very ob- 

 scuro and long-lost species. We gathered a single specimen 1 miles S. of Talla- 

 hassee, Fla., in 1857, differing from the description of Michaux only in its lower 

 Ivs. being scattered. It is about 9' high, smooth. Lvs. 1' long, entire, obtuse, 

 villous-ciliate on their lower margins and very short petioles. Invol. lobes min- 

 utely edged with white. 



9 E. paniculata Ell. Erect from a decumbent base, slender, striate-angled, thinly 

 pubescent ; Ivs. oval or elliptical, subrepand, revolute on the margins, glaucous be- 

 neath, short-petioled, the cauline alternate, ample, the floral small and bract-like, 

 opposite; inflorescence irregularly forked, or paniculate ; invol. email (1" diam.), 

 glands slightly expanded, greenish white. Ga. and Fla. Sts. 8 to 18' high. 

 Lvs. about 18" by 10". Invol. thrice smaller than in No. 10, of which it is con- 

 sidered a variety by Dr. Engelmann. 



10 E. corollata L. FLOWERING- SPURGE. Erect ; caulino and floral Ivs. oblong, 

 narrow, obtuse; glands of the invol. obovate; petaloid; umbel 5-rayed, rays 2 or 3 

 times di- or trichotomous. U In dry fields, etc., Can. and U. S. Stem slender, 

 erect, 1 2f high, generally simple and smooth. Leaves 1 2' long, often quita 

 linear, very entire, scattered on the stem, verticillate and opposite in the umbel. 

 The umbel is generally quite regularly subdivided. Corolla-like involucre large, 

 White, showy. July, Aug. The central head is 2 or 3 weeks earliest. 



ft. ANGUSTIFOLIA. Lvs. oblong-linear ; umbel often becoming irregular or more 

 or less paniculate. Chiefly Southward. 



