Euphorbia. . CXXI. EUPHORBIACEiE. 48> 



cillate, subsessile, oval and entire; pcd. terminal, solitary, 1-flowered. — % la 

 rocky shades, Penn. Pwrsh. Jl. Aug. 



7. E. Lathyris. Mole-tree. Caper Spurge. 



St. erect, stout, smooth ; lis. lance-linear, rather acute, entire, glabrous, 

 sessile; innbcl mostly -l-rayed, raysdichotomous; g/anfh of the in vol. lunate, 2- 

 horned, the horns ililatod and ol)tuse. — (^ Cultivated grounds and gardens. 

 Stem 2—31' high. L«^avcs2 — 1' by '^ — D", immej'ous and arranged in 4 rows on the 

 stem. Umbel of4 verticillate branches with a central subsessile head. Jl. — Sept. ^ 



8. E. Hkrronii. Riddell, Herron^s Euplurrbia. 



Erect, pilose, with opposite branches ; lower Ivs. rhombic-ovate, middle 

 ones lanceolate, upper lance-linear, denticulate, obtuse at apex, acute at base; 

 umbels small, lew tlowered. — (i) Ohio. Plant hairy in all its parts, I — 2f high. 

 Petiole ciliate, half as long as the leaves. Aug. Sept. 



9. E. ANGLSTiFoi-iA. Haworth "? — St. much branched at base, ascending and 

 with barren branches above; Ivs. crowded, linear, obtuse; umbel many-rayed, 

 proliferous; Jloral invol. 2-leaved, leaflets broad-cordate. — %. A heath-like plant 

 of the gardens, native of , If high. Leaves 1' by 1", very numerous, spi- 

 rally arranged, apparently verticillate. f 



10. E. MARGiNATA. Pursh. — Lvs. oblong-lanccolatc, subcordate, sessile, acute, 

 mucronate, entire on the margin, glabrous ; umbel 3-rayed, once or twice dicho- 

 tomous; invoiur.rnte lis. oblong, cordate, colored and membranaceous at the 

 margin ; inner segments of the floral involucre roundish ; caps, hoary-pubes- 

 cent. — Gardens. A handsome species, remarkable for the variegated leaves 

 of the involucre, f 



* * Heads axillary or fasciculate. Leaves opposite. 



11. E. HYPERiciFOLiA. SpuTge. Eye-bright. 



St. smooth, branching, nearly erect, branches divaricate-spreading; lvs. 

 opposite, oval-oblong, serrate, sub-falcate; corymbs terminal. — ® A slender and 

 branching plant, found in dry and rich soils. Stem 10—20' high, usually pur- 

 ple, very smooth, the branches often pubescent, U. S. and Can. Leaves tripli- 

 veined. marked with oblong dots and blotches, ciliate, 6 — 12" long, and i as 

 wide, oblique, on very short petioles. Corymbs of small white heads, terminal 

 and axillary. July, Aug. 



12. E. MACULATA. (E. dcprcssa. Ell. E. thymifolia. Linn.) Spotted Sjmrge. 

 Procumbent; branches spreading; lvs. serrate, oblong, hairy; Jls. axillary. 



— (J) A prostrate plant, spreading flat upon the ground, in sandy fields, Mass. ! 

 to Ind. ! and S. States. Stem 6 — 12' in length, much branched, hairy. Leaves 

 opposite, 3 — 6" long and k as wide, oblong, obtuse, serrulate, smooth above, 

 often spotted with dark purple, the margin ciliate, pale and hairy beneath, on 

 short stalks. Heads of flowers small, crowded near the summit, involucre 

 minute, white. Jl. — Sept. 



13. E. POLYGONiFOLiA. Kuot-grass Spurge. 



Procumbent; lvs. entire, lanceolate and oblong, obtuse at base; fs. in the 

 axils of the branches, solitary. — ® Sea shores, R. I. ! to Flor. A very smooth, 

 succulent, prostrate plant, with milky juice. Stems 6 — 10' long, dichotomous, 

 procumbent. Leaves oblong and linear-lanceolate, rarely cordate at base, 3 — 5" 

 by 1", petioles about 1". Stipules subulate and simple. Heads small, in the 

 forks of the purple stem. June, July. 



14. E. Ipecacuanha. Ipecac Spurge. 



Procumbent or suberect, small, smooth ; lvs. opposite, obovate and oblan- 

 ceolate; pcd. elongated, axillary, 1-flowered.— 1|- Sandy soil. Middle! and S. 

 States. Root perennial, very long. Stem rather thick and succulent, 3 — 8' 

 long. Leaves U — 2' by 3 — G", sessile, varying from obovate to linear. Heads 

 solitary. Peduncles as long as the leaves. June. 



15. E. dentata. Michx. Toothed-lmf Sjmrge. 



Hairy; /r.s-. opposite, oval, dentate ;' /?.s. crowded at the summit of the 

 stem. — (X) "Shady rocks, Penn., Torrey, to Tenn., Michaxix. Upper leaves 

 spotted. — Probably a variety of E. hypericifolia. Jl. Aug. 



