620 ORDER 112. EUPHORBIACE^E. 



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

 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 G to 10" long, less than 1" wide, the floral }'ellowish, 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 l-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. Feplus 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, N. 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. 1 Along 

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

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

 perfoliate, 6 to 9" d.'am. Horned gland* usually but 4. Has been confounded 

 with E. Peplus. Jn. 



6 "E. Lathyria 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, tho horns dilated and obtuse. 

 (f) Cultivated grounds and gardens. Stem 2 3f high. Leaves 2 4' by 3 9 r , 

 numerous and arranged in 4 rows on tho stem. Umbel of 4 vcrttcillato branches 

 with a central subsessile head. JL Sept, g Eur. Supposed efficacious in cx- 

 .pelling moles from the ground. 



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

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

 mous ; involucrate Ivs. oblong, cordate, colored and membranaceocs at the mar- 



. gin ; inner segments of the floral involucre roundish ; caps, hoary-pubescent. (1) 

 A handsome species, remarkable for tho variegated leaves of the involucre. \ 

 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 trichotomous ; Ivs. opposite 

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

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

 scure and long-lost species. We gathered a single specimen ] 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-ciliato on their lower margins and very short petioles, Juvol. lobes min- 

 utely edged with white. 



9 E. paniculata Ell. Erect from a decumbent base, slender, striatc-anglcd, 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 Bmall (L" cliam.), 

 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 Ivs. oblong, 

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

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

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

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



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

 \vhite, 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 



