SYNOPSIS OF THE FLORA OF COLORADO. 77 



entire : radical ones lanceolate-spatulate, narrowed into a short-winged 

 petiole, often very large, G'-ll' long; cauliue ones oblong-lanceolate, 

 seini-amplexicaul ; peduncles thickened above ; heads on long peduncles, 

 naked above, 3-6, very large, 2'-3' broad; scales of the involucre 

 lanceolate or linear, whitish-tomentose; receptacle subglobose; rays 

 15-20, linear, cuneate, about 1' long, orange-yellow; pappus of lanceo- 

 late, subulate, obscurely-nerved scales, a little shorter than the corolla 

 of the disk, as long as the silky-villous acheniuin. A very showy plant. 

 Hoopes. Wet Mountain Yalley, Brandegee. Sierra Madre Range, 

 Ooulter. 



ACHTLLEA MILLEFOLIUM, L. Very common throughout Colorado, 

 Dr. Smith ; Porter; Coulter; Brandegee ; Canby ; Median. 



LEUCAMPYX 1 XEWBERRYI, Gray. Herbaceous, at first woolly, at 

 length nearly glabrous; stems stout, l-2 high, coryinbosely branched; 

 leaves 2-3 piimately parted, segments short, linear, re volute on the mar- 

 gins, radical ones lanceolate in outline, 4'-6' long including the petioles; 

 heads many, rather large, long-peduncled ; scales of the involucre obo- 

 vate, obtuse, with broad scarious tips ; corolla of the disk yellow, of the 

 ray white or cream-colored with a spreading cuneate limb 6" long; ach- 

 euia glabrous, angled, black. This only species of the genus, which in 

 habit resembles a Hymenopappus, was first collected in 1867, by Dr. 

 Xewberry in Xew Mexico, and later in 1872, by Prof. Porter, at the Soda 

 Springs, 35 miles X. W. of Canon City. 



ARTEMISIA DRACUNCULOIDES, Pursli. Hall t(- Harbour, 302. Canon 

 City, Brandcgee. Hoopes. Sierra Madre Range, Coulter. 



ARTEMISIA BOREALIS, Pall. Parry. 



ARTEMISIA CANADEXSIS, MX. Hall & Harbour, 300; Canby; Dr. 

 tim ith ; Porter ; Hoopes. 



ARTEMISIAFILIFOLIA, TOIT. Stems l-3 high, with slender, virgate, 

 pauicled branches ; leaves l'-2' long, whitish-tomentose, becoming 

 smooth, filiform, with revolute edges, lower ones mostly 3-parted; heads 

 very small, crowded in virgate. leafy panicles, tomentose, 3-5 flowered; 

 two florets, pistillate and fertile, with short truncate corollas, the rest 

 perfect but sterile ; corollas funnel-form, 5-toothed. Hall i(- Harbour, 307. 

 Xear Denver. Dr. Smith. 



ARTEMISIA TRIDENT AT A, Pursli. Shrubby, l-6 high, much branched, 

 densely silvery-canescent ; leaves crowded, cuneiform, 6 // -12' / long, 

 usually 3-toothed at the apex, teeth short and obtuse, those of the flower- 

 ing branchlets often linear and entire; heads obovoid, 5-6 flowered; outer 

 scales of the involucre tomentose, very short, inner ones scarious ; flow- 

 ers all perfect and fertile; corollas funnel-form, 5-toothed, the proper 

 tube very short ; styles 2-cleft, the branches widened somewhat upward, 

 truncate and somewhat penicillate. On the Blue River, west of the 

 Rocky Mountain Range. Hall & Harbour, 306. Canby. B. H. Smith. 

 On the Arkansas, Porter ; Coulter. 



1 LKUCAMPYX, A. Gray (in Benth. & Hook. Grew. PI. 2. p. 42*2.) Heads heterogamous, 

 radiate : flowers of tin- ray in one series, pistillate : those of the disk perfect; both feitile. 

 Involucre broadly hemispherical : bracts in '2-3 series, imbricated, broadly scarions at 

 the apex. Receptacle somewhat convex, covered with broad meinbranaceons-hyaline, 

 chaffy scales half inclosing the acheiiia. Corollas of the ray pistillate ; tub* slender : 

 limb broad, 3-toothed or 3-cleft at the apex; those of the disk perfect, regular, tubu- 

 lar: limb campaiiulate, 5-cleft at the apex. Anthers obtuse at base, entire. Branches 

 of the style in the perfect flowers \\ith short penicillate appendages. Achenia'cnueate. 

 incurved, dorsally compressed, subtriquetrous. attenuate at base, obtuse at the apex. 

 Pappus noiir. 



