Order 112.— EUPHORBIACB^. 62^ 



11 B. Cnrtfsii Engelm. Smooth, very slender, branched from the hose; division 

 then cymously iranched; Ivs. all similar, opposite, narrowly linear, lather acute; 

 invol. broadly oboonic, the glands (inner segments) narrowly bordered with a 

 white membrane. — A very slender species, allied to B. corollata, about 10' high. 

 Lvs. 5 to 10" long, less than 1" wide. The narrow white border of invol. con- 

 spicuoua. Ga. (Feay, Pond,) to ¥. Car. (Curtis.) 



12 E. gracilis Ell. Very smooth and slender, st. 2 or 3 -forked below, the 

 branches then repeatedly forked ; Iva. all similar, oblong and oblong-linear, ob- 

 tuse, entire, subpetiolate, mostly opposite ; Invol. on long peduncles, dark purple 

 with oval glands; fr.. strongly 3-lobed, smooth, seeds smoothish, dull. — Sandy 

 pine barrens, S. Car. to Fla. Plant 6 to 10' high, wholly purple when young. 

 Lvs. 8 to 12" long, very variable in width. Mar., Apr. 



/?. EOTUWDiFiLiA. Lvs. roundish or quite orbicular, entire, edged with purple. 

 — With the other, 6' high. A singular variety. 



13 B. heliosc6pia L. Sun Spuroe. Erect ; floral lv.s. obovato, cauline wedge- 

 form, sharply serrate, smooth; umbel 5-rayed, then 3-rayed and forked; fruit 

 smooth and am; sds. reticulated. — Qp A milky weed in cultivated grounds, N. E. 

 to Niagara, S. to Car., remarkable for the symmetry of its vegetation. Stem 

 smooth, erect, 8 — 16' high. Leaves scattered, | — l-jt' long, § as broad at the 

 rounded or retuse apex, tapering to the base. Umbels subtended by a large in- 

 volucre of 5 obovate leaves. Each of the 5 rays is pilous with scattered hairs 

 and subdivided into an umbeUet of 3 rays with a 3-leaved involucel, and these 

 finally into 2 or more pedicellate fascicles. June, July. § Eur. 



14 E. Arkanskna Engelm. & Gr. Slender ; floral lvs. roundish-ovate, subcor- 

 date, obtuse, cauline oblong-spatulate or obovate, all serrulate and glabrous; um- 

 bel once or twice t/richolomous, then simply forked; glands entire, subsessile ; fruit 

 warty, seeds reticulated. — Lexington, Ky. (Short, in Gray's Manual) to Ark. and 

 La. (E. tetrapora Engelm., found in W. La. (Hale), diEfers from this in having 

 i-lmrned glands of the involucre and seeds nearly smooth and even. The foliage 

 is almost indentioal (fide spec, labeled by Dr. Engelmauu). ) 



15 E. obtusata Ph. Wabted Spurge. Lvs. all sessile, obtuse, finely serrulate, 

 tapering to the base, sparsely hairy beneath, the caxilino oblanoeolate, floral round- 

 ish cordate, clasping, mucronate ; umbel 3 to 5-rayed, rays 2 or 3 times forked ; 

 fr. murioate, with wart-like points; styles 2-eleft; sds. compressed, smooth and 

 oven. — "Waste grounds. Can. to Va. and W. States. A smooth, erect plant, If 

 high. Lvs. 1' or more long, the floral much shorter. InvoL subsessile, with small, 

 hairy lobes, and large, oval glands. Sds. brown when ripe. — Closely resembles 

 E. platyphylla L. 



16 B. Darlingtonii Gray. Los. entire, oblong-lanceolate and oblanoeolate, acute, 

 narrowed to the base, subsessile, pilous beneath, ffm floral ovate ; umbel 5 to 8-rayed, 

 rays once or twice divided ; segm. of the invol. colored, entire, subreniform ; fr. 

 slightly warty; sds. smooth. — 11 Moist woods, Penn. to N. Car. (Curtis). St. 2 

 to 3f high, smooth, rarely branched below the umbel. Lvs. B to 4' by 1', entire 

 or slightly serrulate above, those of the stem alternate, of the branches opposite, 

 and nearly as broad as long. Eloral invol. purplish bro-wn within. Caps, at 

 length nearly smooth. May, Jn. (E. memoralis Darl., nee Kit.) 



17 B. Ipeoaoudnhse L. Ipecac Sptirge. Procumbent or subercot, smooth, 

 with numerous, diffuse, forking stems; lvs. opposite, obovate and oblanoeolate, 

 entire, obtuse, subsessile; ped. elongated, axillary, 1-flowered; seeds white, dot- 

 ted, flattened. — % Sandy soil, near the coast. Conn. (Bobbins) to Ga. Et. peren- 

 nial, very long. St. rather thick and succulent, 3 to 8' long. Lvs. 1^ to 2' by 3 

 to 6", varying from obovate to linear. Hds. solitary. Ped. as long as the 

 leaves. Jn. 



18 B. lieteroph^lla Mx. (Engelm.) St. thick, green, glabrous, much branched, 

 tall; lvs. ovate, or sinuate-toothed, or panduriform, the highest often lance-linear, 

 all on slender petioles and scattered ; invol. all clustered and terminal, each with 

 5 ovate lobes ; fr. large, smooth, seeds ovoid, tuborcled. — W. 111. to Iowa (Cou- 

 Bons), S. to Ga. (Pond). Plant of singular aspect, 1 to 3f high. Lvs. 18'' to 2' 

 long, on stalks half as long, usually narrowed in tho middle to a fiddle-shape, the 



