50 Rydberg: Rocky Mountain flora 



the calyx-teeth are triangular, about as broad as long. All three 

 species have rootstocks, or a deep-set root and the stems branching 

 below ground, the corollas are ochroleucous, the keel curved from 

 near the base and without any purple. What Dr. Gray and many 

 later writers regarded as Asti-agalus canipcsU'is is a combination of 

 several species characterized by a cespitose caudex or strongly- 

 branched rootstocks, white, pink- or purple-tinged corollas, and 

 the keel curved only at the tip and with a dark -purple tip. The 

 aggregate consists of Hoinalobris deciirrens Rydb., H. Jiylopliihis 

 Rydb., H. temiifolius Nutt., H. divergens Blankinship (//. camporinn 

 Rydb.), and other species. 



The range of H. campcstris seems to be limited to Wyoming, 

 northern Colorado and northeastern Utah. 



Homalobus oblongifolius 



Hoviolobus hj'lophihis Rydb. Bull. Agr. Exp. Sta. Colo. lOO : 210, 



in part. 1906. 



Perennial with a cespitose caudex ; stems ascending, branched, 

 2-3 dm. high, glabrous or nearly so ; stipules ovate, scarious, 4-5 

 mm. long ; leaves 8—10 cm. long ; leaflets 1 1 — 19, usually oblong, 

 but varying from elliptic to linear-oblong, 1—2 cm. long, ^-6 mm. 

 wide, glabrous above, sparingly strigose beneath, rounded at the 

 apex; peduncles 5—10 cm. long; raceme short, 3—5 cm. long, 

 5-10-flowered ; bracts lanceolate, scarious, i mm. long; calyx 

 strigose with black hairs; tube campanulate, 2-2.5 t^^^- long; 

 teeth subulate, fully i mm. long ; corolla i cm. long, white, tinged 

 with purple; keel with a narrow dark-purple tip; legumes 2—2.5 

 cm. long, strigose, 4 mm. wide ; the lower suture strongly curved, 

 the upper straight or slightly upturned towards the apex. 



This species was included in H. Jiylophilns in my Flora of 

 Colorado, i. c, as far as the Colorado specimens are concerned. 

 It resembles H. Jiyloplulus, but the leaflets are thicker and the pod 

 decidedly strigose and of another shape. In H. liylopliiliis the 

 legume is straight and glabrous from the beginning. H. oblongifolius 

 is found as far as known only in the mountains of Colorado, while 

 H. hylophilus belongs to Montana, northern Wyoming and Idaho. 



Colorado : Cerro Summit, 1901, Baker ^.og (type) ; Leadville, 

 1884, M. E. Jones; North Park, near Teller, 1884, C. S. Sheldofi 

 108 ; Marshall Pass, M. E. Jones. 



New York Botanical Garden. 



