Euphorbia. CXXI. EU'PHORBlACEyE. 48> 



cillate, subsessile, oval and entire ; ped. terminal, solitary, 1-flowered. — % In 

 rocky shades, Penn. Pwsh. Jl. Aug. 



7. E. Lathyris, 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, the horns dilated and obtuse. — (g) Cultivated grounds and gardens. 

 Stem 2— 3rhigh. Leaves 2 — 4' by 3 — 9", numerous and arranged in 4 rows on the 

 stem. Umbel of 4 verticillate branches with a central subsessile head. Jl. — Sept. ^ 



8. E. Herronii. Riddell. Herron^s Euphorbia. 



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

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

 uvibels small, fev/ flowered. — ® Ohio. Plant hairy in all its parts, I — 2f high. 

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



9. E. ANGUsTiFOLiA. Haworth 7 — St. much branclied at base, ascending and 

 with barren branches above; Ivs. crowded, linear, obtuse ; U7nbcl many-rayed, 

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

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

 rally arranged, apparently verticillate. -j- 



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

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

 tomous; involucrate lvs. oblong, cordate, colored and membranaceous at the 

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

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

 of the involucre, f 



* * Heads axillary or fasciculate. Leaves opposite. 



11. E. HYPERiciB'OLiA. Spurge. Eye-bright. 



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

 opposite, oval-oblong, serrate, sub-falcate; corymbs terminal. — (i) 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- 

 reined. marked with oblong dots and blotches, ciiiate, 6 — 12" long, and \ as 

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

 and axillary. July, Aug. 



12. E. MACULATA. (E. depTessQ.. Ell. E. thymifolia. Z^mw.) Spotted Spurge. 

 Procumbent; branches spreading; lvs. serrate, oblong, hairy; fls. axillar)^ 



— (!) A prostrate plant, spreading flat u:-». n 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 i as wide, oblong, obtuse, serrulate, smooth above, 

 often spotted wi^h dark purple, the margin ciiiate, pale and hairy beneath, on 

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

 minute, white. Jl. — Sept. 



13. E. POLYGONiFOLiA. Kuot-gross Spurge. 



Procumbent; lvs. entire, lanceolate and oblong, obtuse at base; Jls. 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, mrely 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. Ipecaclan'Hvt:. Ipecac Spurge. 



Procumbent or subcrect, small, smooth ; lvs. opposite, obovatc and oblan- 

 ceolate ; prd. elongated, axillary, l-flowered. — % 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. de.ntata. Michx. Toot hcd-lmf Spurge. 



Hairy; lvs. opposite, oval, dentate; //.s. crowded at the summit of the 

 stem.—® Shady rocks, Penn., Torrey, to Tenn., Michaux. Upper leaves, 

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



