628 Ordbb 112.— EUPHORBIACE^. 



upper stained deep red on the edges, &c., more or less. Invol. reddisli, with a 

 seaaile gland. Jb,, Jl. (E. cyathiflora Jacq.) 



19 E. dent^ta Mx St. low, slender, hairy, brachiately branched; fcs. ojjposite, 

 .petiolate, ovcUe-lanceolaie, obtuse, coarsely dentate, paler and hairy beneath ; inTol. 

 subsessile, in a terminal cluster, each with 5 ovate, laciniate lobes; fr. minutely 

 velvety; seeds globular, tuberoled. — In shady places, Penn. to Iowa and La. 

 Plant 6 to 12' high ; Ivs. 1 to 2', mostly lanceolate, but varying to linear. InvoL 

 with one or more stalked glands. Seeds grayish. Jn. — Aug. 



20 E. hjrpericifblia L. St. smooth, branching, nearly erect, branches divaricate 

 spreading; Ivs. ovalrdblmig, very oblique, serrate all around; corymbs terminal ; 

 seeds rugous, black. — (I) A slender and branching plant, found in dry and rich 

 soils, U. S. and Can. Stem 10 — 20' high, usually purple, very smooth, the 

 branches often pubescent. Leaves tripli-veined, marked with oblong dots and 

 blotches, oiliate, 6 — 12" long, and \ as wide, oblique, on very short petioles. Co- 

 rymbs of small, white heads, terminal and axillary. July, Aug. 



21 E. glyptoBp6nna Engelm. Decumbent at base, much branched, slender, 

 glabrous; Ivs. oblong, oblique, obtuse, serrulate towards the end; stipules cleft and 

 fringed ; invol. subsessile, appendages crenulate, white ; sds. angular, sculptured, 

 amber color. — Madison, Wis. (Lapham), and southwestward. A delicate species. 

 Lvs. 6" by 2", and smaller, strongly arcuate. Stipules whitish, cleft into hair-like 

 processes. 



22 B. maoulata L. Procumbent ; branches spreading ; lvs. serrate, oblong, 

 hairy; fls. in crowded, axillary clusters; seeds brovmish, i-angted, wrinkled. — 

 (1) Plant spreading flat upon the ground, in sandy fields. Can. and U. S. Stem 

 C — 12' in length, much branched, hairy. Leaves opposite, 3 — G" long and J 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. This and Nos. 

 23 and 24 are too closely allied. 



23 E. humistrata Engelm. Procumbent, roughly and minutely villous, diffuse ; 

 lvs. obliquely elliptical, obtuse at both ends, denticulate near tlie apex, sparsely 

 liairy beneath ; ped. crowded in lateral clusters, slwrier than the very short petioles ; 

 invol. slit on the back, appendages subentire ; sds. ovate, 4-angled, minutely rough- 

 ened (not wrinkled), asli-colored. — Banks of the Mississippi, St. Louis (Engelman) 

 and southwestward. Lvs. 4 to 1'' by 2 to 4", sometimes nearly smooth, some- 

 times spotted above. Fr. puberulent, acutely angled. Seed ?" long. 



24 E. prostrata Ait. Prostrate, verj' diffuse, villous-pulverulent ; lvs. roundish- 

 oval, very obtuse at both ends, minutely serrulate towards the apex, villous be- 

 neath; ped. clustered, longer than the very sliort petioles ; invol. appendages obtuse, 

 entire; fr. woolly; sds. 4rangled, transversely rugous. — Elver banks, S. "VV. States 

 (Hale). Spreading in large patches, with rather dense foliage, clothed all over 

 with a fine dusty wool. Lvs. of two sizes, the cauline 3 to 5" by 2 to 3", the 

 ramial scarce half as large. Seeds light brown. 



25 E. polygonifolia L. Knot-ge-4.ss Spurge. Procumbent; te. entire, fe»cf- 

 olate and oblong, obtuse at base ; invol. subsessile, in the axils of the branches, soli- 

 tary ; seeds large (1" long) smooth, ovoid. — 3) Sea shores, R. I. to Fla. A very 

 smooth, succulent, prostrate plant, with milky juice. Stems C — 10' long, dicbo- 

 tomous, 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. 



26 E. cordifolia EU. Prostrate, spreading, glabrous ; lvs. obliquely cordate at the 

 base, oval, obtuse, entire, distmctly petiolate ; stipules laciniate ; ped. neaa-ly as lo^vj 

 as the leaves, loosely clustered, subterminal; invol. appendages oval, white, con- 

 spicuous; fr. angular; seed obtuse-angled, smooth. — <T) In cultivated lands, Car. 

 to Fla. and La. Spreading in large patches, with alternato branches and open 

 foliage. Lvs. 3 to 5'', rarely 6'', slightly variegated. Sds. brownish white. 



27 E. serpena H. B. K. (Engelman). Prostrate, spreading, glabrous; lvs. very 

 small, roundish-oval, obtuse at both ends, entire; ped. much Irniger than the pe- 

 tioles, solitary or several in the axil ; invol. appendages scarcely any ; sds. smooth, 

 obtusely angled. — Banks of the Miss., St. Louis (Engelm.) to N. Orleans (Hale). 



