g2« Order 112.— EUPHORBIACE^E. 



2 E. Cyparfssias L. Cypress Spurge. Lvs. linear-setaceous, crowded on tha 

 stem, with a spiral arrangement; floral lvs. broadly cordate, all ses8ile ; umbel of 

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

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

 with numerous leave3 6 to 10" long, less than 1" wide, the floral yellowish, very 

 different. § Eur. 



3 E. Esula L. Lvs. 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 ovale ; 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 andt 4 

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



5 E. cornnratata Engclm. Decumbent and branched at base, smooth; sts. erect; 

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

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

 Streams, W. Ta. to Ohio, 111. frequent, and S. to Fla. Sts. a foot high, onco or 

 twice trichotornous, the floral lvs. so applied at base as to appear orbicular and 

 perfoliate, tj 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, smoot'i ; lvs. 

 lancc-linear, rather acute, entire, glabrous, sessile ; umbel mostly 4-ra3 r ecl, rays 

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

 — @ Cultivated grounds and gardens. Stem 2 — 3f high. Leaves 2 — 4' by 3 — 9", 

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

 With a central subsessile head. Jl. — Sept. § Eur. — Supposed efficacious in ex- 

 pelling moles from the ground. 



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

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

 mous ; iavolucrate lvs. oblong, cordate, colored and membranaceous at the mar- 

 gin ; inner segments of the floral involucre roundish ; caps, hoary-pubescent. — Q_) 

 A handsomo species, remarkable for the variegated leaves of tho involucre, f 

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

 dens. § Native in Nebraska. 



8 E. mercurialina Mx Sts. slender, weak, simply trichotornous; lvs. opposite 

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

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

 scure 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 

 lvs. 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; lvs. oval or elliptical, sulrepand, revolute on the margins, glaucous be- 

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

 opposite; inflorescence irregularly forked, or paniculate ; invoL small (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 ; cauline and floral lvs. oblong, 

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

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

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

 linear, very entire, scattered on the stem, verticillato and opposite in tho 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. 



/?. angl'stifolia. Lvs. oblong-linear ; umbel often becoming irregular or more 

 or less paniculate. — Chiefly Southward, 



