CATALOGUE. 173 



altitude (808). This plant was found blooming higher and later than any 

 other species in Arizona. From the summit of Mount Graham, at 9,000 

 feet, we have the variety "canescens, pube lanulosa decidua indutum" 

 (Gray), some heads of which have the rays almost entirely wanting. 

 (404.) For a recent arrangement of the genus by Professor Gray, see 

 Proc. Amer. Acad, ix, p. 202 et seq. 



Gaillardia aristata, Pursh. — Perennial, 6'-2° high, pubescent (un- 

 branchedf); lower leaves linear-lanceolate, obspatulate or pinnatifid, on 

 long-margined petioles, upper ones sessile and usually entire; heads 2-4' 

 in diameter; rays 1' or more long, usually entire, yellow; pappus of the 

 ray-flowers somewhat shorter than that of the disk; tube of the disk- 

 flowers short, limb cylindrical, glandular-hairy above, and with the lobes 

 bristle-tipped ; scaly pappus lanceolate, one-quarter as long as the limb, 

 midrib produced into an awn nearly as long as the disk-flower; achenia 

 slightly hairy; bristles of the receptacle stout, 3-4 times as long as the 

 achenia, thickened at the base. — Colorado, in South Park (483). 



Gaillardia pulchella, Fougeroux. — Erect, branching, smooth; lower 

 leaves petioled, lanceolate-spatulate, upper ones sessile, broadly lanceolate 

 or oblong; peduncles 4-6' long; scales of the involucre in two series (the 

 inner shorter), tips much attenuated; rays orange-colored, cuneate, deeply 

 three-lobed ; disk-flower lobes purple, glandulai'-hairy, drawn out into a 

 bristle tip; pappus (disk) with the scales broadly oblong and the midrib as 

 long as the flowers ; awns of the receptacle thickened and hardened at 

 base, four times as long as the achenium, which is densely covered with fer- 

 ruginous hair (or, as expressed by Torrey and Gray, " involucrate with a 

 villous ferruginous tuft"). This and the above species often closely resem- 

 ble one another in the flowers. Indeed, in a specimen from the Laramie 

 Mountains, named by Dr. Gray O. aristata, I find the hairy achenium much 

 more like that of G. pulchella (which, from the unbranched stem and pin- 

 natifid leaves), it can hardly be — Cottonwood, Arizona (345). 



Actinella acaulis, Nutt. — South Park, Colorado, at 12,000 feet ele- 

 vation (457). 



Actinella argentea, Gray (PI. Fendl. p. 100). — Stem at base, short, 

 thick, woody, and branched almost as in A. acaulis and leafy; above slender, 



