294 URDEU 113. EUPIIORB1ACE.E. 



volucro culyx-like, 4- or 5-lobcd, often with 4 or 5 large glands. $ Fls 

 9 or more, each a stamen with a bract. $ Flower central, a 3-celled, 3- 

 ovuled ovary on a pedicel. Styles 8, 2-cleft. Caps. 3-lobed, separating 

 into 3 nutlets. Plants with a milky juice. 



Shrubs of the greenhouse, with scarlet bracts or involucres Nos. 3338 



$ Herbs, erect, without stipules. Leaves alternate or opposite. . .(a) 

 Herbs, mostly prostrate, diffuse. Leaves all opposite, oblique at base, 

 small, furnished with small stipules at base. Glands of the involucre 



4, usually white-margined. May Nov (x) 



a Glands of the involucre 5, bordered with white petaloid appendages.. .(&) 

 a Glands of the involucre 4 or 5, crescent-shaped or 2-horned. . .(c) 

 a Glands of the involucre 1 5, neither white nor horned. . .(d) 



b Heads pedunculate. Branches regular. Leaves oblong to linear Nos. 1, 2 



b Heads pedunculate. Branches irregular. Leaves oval or ovate Nos. 3, 4 



b Heads nearly sessile. Leaves with broad white margins . . No. 5 



! Umbel of many rays. Stem leaves narrow, alternate. Seeds smooth. 2j...Nos. 6, 7 



e Umbel of 3 rays, and forked. Stem leaves alternate, thin Nos. 8, 9, 10 



C Umbel of 3 or 4 rays, and forked. Stem leaves opposite, thick No. 11 



d Inflorescence a simple terminal cluster. Leaves toothed or lobed. . ..Nos. 12, 13 

 d Inflorescence a forked cyme, peduncles in the forks. Lvs. entire Nos. 14, 15 

 d Inflorescence a con.pound umbel. Heads terminal.. .() 



Seeds reticulated or wrinkled. Leaves serrulate Nos. 16, 17 



e Seeds smooth and even, * in a rough, warty fruit Nos. 1820 



k in a smooth and even fruit Nos. 21 J3 



X Leaves serrulate or serrate. Seeds roughened with wrinkles or pits., .(y) 



y Stems ascending or erect. Plants smooth or smoothish Nos. 24 26 



y Stems flat on the ground, spreading, mostly hairy Nos. 27, 28 



a; Leaves entire. Seeds smooth and even. Plant glabrous Nos. 29 32 



1 E. corolla ta L. Flowerings. Erect, glabrous, or subglabrous ; umbel 3-7-rayed, 

 rays 3- and 2-forked : Ivs. oblong to oblong-linear, obtuse, those of the umbel whorled 

 or opposite ; involucre glands obovate, petaloid. y. Dry fields'. 1 2f. July, Aug. 

 ft. anfiiHlifoUa. Leaves oblong-linear ; umbel becoming irregular. S. 



t E. Curtisii Eng. Smooth, slender, branchi-d from base, divisions about 3-forketl, 

 then 2-forkrd ; leaves opposite or in 3's, linear-oblong or linear ; heads minute ; in- 

 volucre glands narrowly white-bordered. V. Barrens, S. If. (E. discoidalis Chapm.) 



3 E. pubentisslma MX. Hairy, 2 or 3 times forked ; leaves oval or ">vate-oblong, 



petiolate or subsessile, scattered, the floral much smaller ; heads minute ; involucre 

 glands minutely white-margined, entire. Dry. S. If. (E. paniculata Ell.) 



4 E. mercurlalina. MX. Stem naked below, leafy, and 3- or 2-forked above, pubes- 



cent ; leaves oval or ovate, petiolate. mostly opposite ; involucre lobes creniUate, 

 white. Tenn. : rare. 8 1CK. Too near to the preceding. 



5 E. in artel ii a ta Ph. Leaves lance-oblong, sessile, the floral crowded, and with a 



broad white margin ; umbel 3-rayed, capitate. (T) Ky., and W. If. t 



6 E. Cyparisslas L. Lvs. linear, much crowded, the floral broad-cordate, all sessile ; 



umbel of many simple rays ; glands Innate. V. Fields and gardens. If. 



7 E. Esula L. Lvs. lance-linear, the floral broadly cordate ; umbel of many (orked 



rays, and scattered branches below ; glands 2-horned. Fields : rare. 

 3 E. Pepliis L. Leaves round-cuneate, the floral ovate ; umbel of 3 (rarely 5) forked 



rays ; carpels doubly wing-keeled on the back. Fields, N. Eng. : rare. Europe. 

 9 E. Ohlotica Stend. Smooth, erect fnmi a decumbent branching base; Ivs. mostly 



floral, reniform, sessile, the pairs appearing orbicular; carpels not winged ; glands 2 



uornsil. V Wood*. Ohio, W. and S. If. (E. rominntata Kng.) 



