MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 247 



Montana: Beaver Head Co., 1888, F. Tweedy, 20§ (in part). 



Homalobus tenellus (Pursh) Britton : Britt. & Brown, 111. Fl. 2: 

 305 ; Aslragaliis tenellus Pursh, Fl. Am. Sept. 473 ; Ervwn mtil- 

 tijiortun Pursh, Fl. Am. Sept. 739; Astragalus miiltiflorus Gray, 

 Proc. Am. Acad. 6: 226 [Man. R. M. 67 ; Bot. Cal. i : 153]. 

 On prairies, up to an altitude of perhaps 2000 m. 

 Montana: Park Co., 1889, Tzveedy. 



* Homalobus Bourgovii ; Astragalus Bourgovii Gray, Proc. Am. 



Acad. 4: 227. 



Like Astragalus elegans in habit, but the dark violet flowers slightly 

 larger and the pod very different, showing its near relationship to 

 Homalobus campestris and decumhens. Watson includes this in the 

 section with stipitate pod, but William's specimens show the true 

 nature of the fruit. At an altitude of 2000-3000 m. 



Montana: Yogo, 1888, R. S. Williams, 747; McDonald Peak, 

 1883, Canhy, 87; Bridger Mts., 1896, Flodman, 62^; Little Belt 

 Pass, 6jo and 6j2; Spanish Basin, 6ji. 



* Homalobus hylophilus. 



Stems many, from a branched rather slender rootstock, slender, 

 leafy, with very short joints, finely and sparingly grayish-strigose ; 

 stipules ovate, more or less united, about 5 mm. long ; leaves nearly 

 erect, 1-1.5 dm. long, sparingly grayish-strigose, pinnate with 6-12, 

 generally 8, pairs of lance-oblong leaflets, 1-2 cm. long, which are 

 acute at both ends ; raceme short, 6-12-flowered, on a peduncle about 

 I dm. long ; bracts small, linear-subulate ; pedicels very short ; 

 flowers 8-12 mm. long; calyx tube 3 mm long., dark strigose, the 

 teeth very short, scarcely i mm. long; corolla almost white, tinged 

 with purple only on the tip of the keel; pod linear-oblong, sessile, 

 tapering at the apex, 2-2.5 cm. long and 3-4 mm. wide, glabrous, 

 more or less reflexed ; ovules 9-12. 



Has been mistaken for //. campestris Nutt. {Astragalus conval- 

 larius Greene) ; but differs in the much lower and bushy stems, 

 nearly upright and bright green leaves, short joints of the stem, 

 peduncles which only a little exceed the leaves, broader leaves, 

 and sparser pubescence. It also resembles H. tenuifolius Nutt., 

 but is a larger less hairy plant, has much broader leaves and some- 

 what larger flowers. 



It is common in woods, in the mountain regions, at an altitude of 

 1500-2500 m. 



