SYNOPSIS OF THE FLORA OF COLORADO. 23 



fruit, I/ long, on short peduncles or sessile on the ends of the leafy 

 branches; bracts obovate, apiculate, about the length of the yellow 

 flowers: calyx deeply cleft, teeth setaceous, plumose. Purgatory River, 

 Dr. Bell. Closely allied to D. a urea, from which it differs in its diffusely 

 spreading-, slender stems, repeatedly branched and leafy to the spikes, 

 which are smaller and much less dense. 



DALEA JAMESII, Torr. Stems several from one root, 4'-9' high, 

 somewhat woody at the base; whole plant silky-pubescent; leaves pal- 

 mately tri-foliolate, not dotted with glands; leaflets obovate, very obtuse; 

 stipules setaceous, erect, rigid, 4" long; petioles G"-!)" long; spikes 

 oblong, sessile, dense and broad, about I 7 long; bracts ovate, acuminate, 

 longer than the calyx; calyx deeply cleft, segments setaceous, plumose, 

 longer or shorter than the vexillum; flowers golden-yellow. Caiion 

 City, Brandegee. 



PETALOSTEMON YIOLACEUS, MX. B. H. Smith. Colorado Springs 

 Porter. Plains of the Platte, not as common as the following, Coulter. 



PETALOSTEMOX CANDIDUS, MX. Common on the plains. Dr. Smith: 

 Coulter : Porter. 



PETALOSTEMON MACROSTACHYUS, Torr. Ann. X. Y. Lye., 2, p. 176. 

 Glabrous, stem l-2 high, branched, dotted, leaflets 2-3 pairs, lanceo- 

 late-oblong, obtuse, dotted beneath, J' long, upper surface becoming deep 

 verdigris-green in drying; spike cylindrical, elongated, 6 and more 

 when old, the rachis villous ; bracts lanceolate, as long as the flower; 

 calyx silky- villous, teeth lanceolate; vexillum cordate; petals linear- 

 oblong, narrowed at the base and nearly white; legume inclosed in the 

 persistent calyx, gibbous, compressed, baity. Hall & Harbour, 105. 



AMORPHA FRUTICOSA, L. On the plains, along the Platte, Coulter. 

 Pueblo County, Redlidd. 



AMORPHA CANESCENS, Xutt. Plains, Porter. 



ROBIN IA XEO-MEXICANA, Gr. PI. Thiirb., p. 314. Shrub 4-G- high ; 

 stipular prickles subrecurved, sharp and stout; leaflets elliptical or 

 oblong, i'-l' long; peduncles and the short, crowded racemes hispid 

 with straight glaiiduliferous hairs; calyx finely hispid, teeth subulate- 

 lanceolate; corolla rose-color ; pods glandular-hispid. Resembles in its 

 flowers E. rixeoxa. Cucharas River, Huerfauo County, Greene. 



ASTRAGALUS CARYOCARPUS, Ker.Hall i(- Harbour, 132 and 133. 

 Brandegee. On the plains and in South Park, Porter. 



ASTRAGALI'S MEXICANUS, A. DC. 



ASTRAGALUS PLATTENSIS, Kutt. We have seen no specimens 01 

 this nor of the preceding species from Colorado, but from the range 

 ascribed to them by Dr. Gray in his Revision, Proe. Am. Acad.. vol. 6, p. 

 193, they doubtless exist there. 



ASTRAGALUS MOLLISSUMUS, Torr. Ann.X. Y. Lye., 2, p. ITS. Perennial, 

 subacaulescent, shining with a soft silky-villous, often yellow, pubes- 

 cence ; peduncles long, scape like; spikes dense; flowers rather large, 

 violet; calyx tubular; pod cartilaginous, oblong, turgid, 5"-9" long, 

 very smooth, subdidymous, ovary also glabrous; stipules lanceolate, 

 free, cohering below the petiole; leaflets 11-14 pairs, ovate-oblong or 

 oval, V long, obtuse, but slightly inucronate. Hall c(* Harbour, 122. 

 On the plains, scarce, 'Dr. Bell. 



ASTRAGALUS CANADENSIS-, L. At the base of the foot-hills and 

 along water-courses of the plains. B. H. Smith; Porter; Brandegee. 



ASTRAGALUS ADSURGENS, Pall. (A. stria-tux, Xutt.) Gray's Eer. 



