SYNOPSIS OF THE FLORA OF COLORADO. 125 



triangular-ovate from a somewhat oblique, abruptly attenuated base, or 

 oblong, obtuse, with re volute margins; stipules triangular-lanceolate, 

 ciliate; involucre axillary, solitary, canipanulate, hairy on the outside 

 and in the throat, lobes triangular, elongated ; glands ovate with a very 

 narrow tabulate appendage; style short, 2-parted, somewhat thickened 

 at the apex; capsule hirsute with appressed hairs; carpels obtusely cari- 

 nate; seed oblong, 4-angled, transversely wriukled. Purgatory Elver, 

 Dr. Btll. 



EUPHORBIA PETALOIDEA, Engelm. DC. Prod., 15, 2d pt., p. 28. Glab- 

 rous; stems dichotomous, procumbent or ascending; leaves attenuate to 

 the scarcely oblique base, oblong-linear or linear, elliptic, 5"-7" long, 

 lJ"-2" broad, obtuse, mucronulate, entire ; stipules subulate, somewhat 

 entire; involucres, solitary, on pedicels about their own length, campanu- 

 late, lobes hairy beneath the glands within, minutely-ciliate, triangular, 

 acute; glands suborbiculate, concave, with an entire ovate appendage 3 

 times their breadth; style short, bifid; the carpels of the depressed 

 capsule rounded; seed ovate, acute, obsoletely 4-angled. Hall & Har- 

 bour, 512. Canon City, Brandegee. Near Denver, Dr. Smith; B. H. 

 Smith. 



EUPHORBIA FEXDLERI,T. & G. DC. Prod., 15, 2d pt., p. 38. Glabrous, 

 from a slender, short, somewhat woody root-stock; stems numerous, deli- 

 cately filiform, rather rigid, erect or decumbent, much branched dichoto- 

 mously 2'-4' high ; leaves lJ"-2" long, ovate from a rounded base, obtuse, 

 entire, stipules subulate, often laciniate at base; involucres terminal, soli- 

 tary, turbiuate, slightly bearded in the throat, lobes short, ovate, fim- 

 briate; glands transversely oblong with a very narrow obsolete append- 

 age; style short, divaricate, bifid; capsule 1" broad, furnished with a 

 small, somewhat 6-lobed calyx; carpels obtusely carinate ; seed ovate, 

 4-augled, irregularly scrobiculate-punctate. Hail & Harbour , 513. 



EUPHORBIA REVOLUTA, Engelm. DC. Prod. 15, 2d pt., p. 46. Glab- 

 rous; stem erect, filiform, naked below, much branched above the middle, 

 4 / -5 / high; leaves 5"-12" long, J" wide, narrowly linear, entire, obtuse, 

 revolute on the margins, attenuated below, base rather oblique, short- 

 petioled; stipules subulate, entire; involucres very small, uppermost in 

 the forks of the branches and terminal, somewhat truncate, short-cam- 

 panulate, lobes triangular-lanceolate, ciliate; glands purple, 3 or 4 times 

 broader than the whitish or reddish, oblong appendage; styles short, 

 bifid; capsule glabrous, acute, carinate, J" long; seed oblong, sharply 

 4-angled, sparingly and irregularly rugose! Canon City, Brandegee. 



EUPHORBIA ^IACULATA, L. Plains near Denver, Coulter. 



EUPHORBIA OLYPTOSPERMA, E u gel m. Canon City, Brandegee. Colo- 

 rado Springs, Porter. Canby. i'fear Denver, Dr. Smith. 



EUPHORBIA HEXAGONA, Nutt. DC. Prod., 15, 2d pt., p. 52. Somewhat 

 hairy with scattered appressed hairs; stem slender, 1-1 high, erect, 

 annual; branches opposite and dichotomous, striate-angled, lower ones 6' 

 long ; leaves all opposite, short-petioled, linear-lanceolate, attenuate at 

 each end, acute, mucronulate, entire, lower ones with the petiole lj' long, 

 2"-2" wide; fioral ones very narrowly linear; stipular glands minute; 

 invofucre hairy without and' in the throat, short, many cleft; glands 5, 

 transversely ovate, with a green ovate-triangular, acute appendage, 

 twice their length; styles very short, capitate and somewhat 2-lobed at 

 the apex; carpels of the smooth capsule (2" long) obtusely carinate; seed 

 ovate, finely scrobiculate and tuberculate. On the plains. Hall & Har- 

 bour, 511. Plains near Denver, Porter. 



EUPHORBIA MARGINATA, Pursh. Hall & Harbour, 508. Plains near 



