SYNOPSIS OF THE FLORA OF COLORADO. 71 



tricuspidate, the middle point ranch the strongest and dark-colored ; 

 achenia finely appressed-pubescent ; pappus of two lanceolate, chaffy 

 awns. Plains near Denver and Colorado Springs, Porter; Dr. Smith. 

 Caiioii City, Brandegee. Along the Platte, Coulter. 



HELIANTHUS ORGYALIS, DC. Stem tall, 6-10 high, very smooth ; 

 leaves very numerous and narrow, linear, 3'-6' long, l"-2" wide, flat, the 

 lower remotely denticulate, 1-nerved, slightly if at all scabrous ; heads 

 5-7, corymbose, on long peduncles, rather large; scales of the involucre 

 lax, attenuate-subulate, longer than the disk; rays about 15, I' or more 

 long; chaff of the receptacle, linear- subcuneifonn, somewhat ciliate at 

 the apex ; pappus of 2-4 awns ; aeheuia glabrous. Parry, 57. 



HELIANTHUS RIG-IDUS, Desf. Hall <fc Harbour; Dr. timith. Canon 

 City, Brandegee. Platte River, Coulter. 



HELIANTHUS FUMILUS, Nutt. (?) Sill. Jour.,, (X. $.,) v. .'33, p. 10. 

 Stem l-3 high, hispid, bearing a few heads; leaves opposite, ovate- 

 lanceolate, sub-entire, cinereous-hispid, (when young, covered with res- 

 inous atoms,) -tripli-nerved next the base, short-petioled, uppermost 

 lanceolate, subsessile, often alternate ; involucre a little shorter than 

 the disk, scales oblong, not appendaged, obtusish, white-villous with- 

 out; flowers of the disk yellow; aeheuia glabrous, toward the apex 

 sparsely hispid-ciliate; chaff of the pappus subulate, a little shorter 

 than the corolla, with smaller ones interposed on the outside, and mar- 

 gins appressed-hispid. Hall d' Harbour, 269. 



HELIANTHUS GIGANTEUS, L. Canon City, llrandcyee. Denver, Dr. 

 Smith. The form with opposite narrowly-lanceolate, and long acumi- 

 nate leaves, and long, narrow, foliaceous involucral scales. 



HELIANTHELLA 1 UNIFLORA, T. & G. Stem and leaves clothed with 

 a short and soft, somewhat-cinereous pubescence, 2-3 high; leaves 

 broadly lanceolate, -A'-^' long, l'-2' wide, pointed, narrowed at the base, 

 mostly opposite, lower ones petioled, all 3-nerved above the base ; heads 

 solitary or with 1-2 from the upper axils, on long peduncles, 2 / -4 / broad; 

 involucre leafy at base, scales lanceolate, ciliate-hirsute; chaff of the 

 slightly convex receptacle closely couduplicate, delicately scai ions, pu- 

 bescent at the tip; achenia 2- winged, ciliate and pubescent, crowned 

 with 2 long awns and 2-4 intermediate lacerate squanielhe; rays 15-20, 

 pale yellow. Rail d* Harbour, 268. Canon City, Brandeaee. Near Den- 

 ver and Horse Shoe Mountain, Coulter. 



HELIANTHELLA PARRYI, Gr., Proc. Acad. Pit //., March. 1863, p. 68. Xote. 

 Hirsute; stem single from a thickened root; radical leaves narrowly 

 lanceolate, hispidly-ciliate, very acute, 6' long including the petiole, upper 

 cauline ones sublinear, V-2? long; heads 2-i, small, somewhat nodding, 

 on short or elongated peduncles; scales of the involucre linear-lanceolate, 

 long-acuminate, inner ones exceeding the disk, hispidly-ciliate; chaff 

 of the receptacle slightly scailous, barbulate on the truncate apex; 

 achenia oblong, awnless, crowned with hyaline squamelUe which are re- 

 solved into a villous fringe that equals the proper tube of the corolla in 



1 HEI.IANTHELLLA, Torv. & Gr. Heads many-flowered : the i ay-ri< wers H >-24. neutra 1 : 

 those of the disk perfect. Scales of the involucre linear or lanceolate, in about 2 series, 

 loose, somewhat foliaceous. Chaff of the receptacle persistent, embracing the achenia. 

 Corolla of the disk cylindrical, elongated. 5-toothed, with a very short proper tube. 

 Branches of the style very hispid, more or less obtuse. Ovary compressed, with one or 

 both margins slightly winged and produced at the summit into a short auriculate and 

 lacerate persistent appendage or into an awn, sometimes with intermediate squamelhe, 

 or an obscure coroniform fringe, glabrous, or ciliate. Perennial herbs, with linear or 

 lanceolate mostly scattered ami sessile entire leaves, and solitary showy heads termi- 

 nating the stem or branches. T. |' G. FL X. Am. 



