SYNOPSIS OF THE FLORA OF COLORADO. (NJ 



linear or lanceolate, rigid, 8"-12" long, glabrous, or slightly scabrous 

 on the margins ; heads small, 5-6-flowered, clustered in dense flat co- 

 rymbs; involucre 2"-3" long, obcouic, of loosely imbricated, glab- 

 rous, sometimes resinous or glutinous, oblong-linear, obtuse scales, the 

 outer ones very short ; corolla at first scarcely exserted, but as the aehe- 

 nium grows it considerably exceeds the involucre; style as in the last; 

 achenia hairy ; pappus of rather rigid and scabrous setae. 



Var. STENOPHYLLA, Gr., 1. c., p. 64G. Leaves very narrowly linear or 

 filiform ; heads 3-5-flowered. Wet Mountain Valley, Erandegee. 



Var. LATIFOLIA, Gr., /. c., p. 646. ( Linosyris vixcidiflora, var. latifolia, 

 Eaton in King's Rep. 5, p. 157.) Leaves oblong, I'-l-J' ioiig,o"-G" wide. 

 North Park, Dr. Haijdtn. 



Var. SEKKULATA, Gr., I. c., p. 64(>. (Linoxyris xerrulata, Torr. in Stansb. 

 Rep., p. 389.) Margins of the leaves ciliate or minutely serrulate, with very 

 short rigid bristles, otherwise nearly glabrous. Hall & Harbour, 295. 

 South Park, Canby ; Porter. Upper Arkansas, Coulter. Wet Moun- 

 tain Valley, Brandegee. 



Var. TORTIFOLIA, Gr., 1. c., p. 646. Like the preceding, bnt the leaves 

 spirally twisted. Bather common. Upper Arkansas, Porter. South 

 Park, Coulter. Wet Mountain A" alley, Brandegee. 



A PLO PAPPUS 1 RUBIGINOSTJS, T. & G. Viscidly pubescent and cine- 

 reous; stems erect or decumbent, corymbosely branched, lO'-lS' high; 

 leaves lanceolate or narrowly oblong, laciuiate-incised, the divaricate 

 teeth produced into pellucid bristles; heads subglobose, few or many, 

 corymbose, terminating the leafy branches, often bracteate ; scales of 

 the involucre linear, acute, bristle tipped, viscidly-puberulent, in about 

 2 series, nearly equal, loose, at length spreading; alveoli of the recep- 

 tacle pilose-fimbriate ; achenia turbinate, densely silky -villous; pap- 

 pus reddish brown. Platte River, near Denver, Dr. Smith. Hull & Har- 

 bour, 287. 



APLOPAPPUS SPINULOSUS, DC. Herbaceous, canesceut with a soft, 

 minute, woolly pubescence; stems many, l-2 high, corymbosely 

 branched above; leaves small, 9 // -12 // long, rigid, pinnately or some- 

 what bi-piunateiy parted, segments short, linear-subulate, 'mucronate 

 with a short bristle; heads small, subglobose, terminating the numer- 

 ous branchlets ; involucre shorter than the disk, scales subulate-lanceo- 

 late, mucroimlate, imbricated in 3-4 series, appressed, eauescent; rays 

 20-30; corolla of the disk with very short teeth ; pappus pale or tawny, 

 shortj very unequal; achenia turbinate, villous. Canon City, Brande- 

 gee. Plains near Denver, Dr. Smith. Hall < Harlonr, 288; Canby. 

 Colorado Springs, Red field. 



i's. I'ass. (Maeronema f Ericameria, Menotnx, Ixopapputt, Aplopappus, Pyrro 

 coma and Prionopsis of Torrey & Gray's J-Vo/'rt.) Heads few-many-flowered; ray-Ho\vors 

 3-maiiy, pistillate, fertile; those of 'the disk tubular, perfeet, generally fertile, invo- 

 lucre cylindrical, turbiuate, campanulate, or hemispherical; the scales imbricated in 

 few-several series, from linear-subulate varying to broadly oval, with or without folia- 

 ccous tips; the outer ones sometimes smallest, sometimes very lar^e and leaf-like. 

 hVceptaele Hat, alveolate. Corolla of the disk funnel-shaped, or slightly dilated nit- 

 ward. 5-toothed. (Style of the disk flowers with the branches flattened, sometimes 

 broadly lanceolate, but more frequently much elongated, the subulate hispid appen- 

 dages much longer than the stigmatic portion. Achenia oblong or linear, mostly terete 

 01- turbinate, villous or pubescent, rarely glabrous. Pappus simple, white or brownish : 

 of copious, mostly unequal scabrous, somewhat rigid or soft capillary bristles. Peren- 

 nial herbs or surfrutii-ose plants, with entire or pinnately -toothed or serrate leaves: 

 the heads often large and solitary, but sometimes smaller and corymbose or somewhat 

 panieled. Natives of Western North America and parts of South America : the flowers 

 always yellow, but showing great diversity in the size of the heads and in the rays, 

 styles, pappus, etc. The few rayless species are not easily separated from Linosyri*. 



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