182 



Rydberg: Notes on Fabaceae — I 



specimen in the Gray Herbarium has narrowly linear leaflets 

 and the stipe of even very immature pods is quite as long as the 

 calyx." These statements do fit Nuttall's specimens of "H. 

 nigrescens" in the Torrey Herbarium but not his description of 

 H. dispar. The specimens in question were collected on the 

 Missouri, but I do not know the date; there is no evidence that 

 they came from Fort Mandan. 



9. Homalobus stipitatus Rydb. Although H. tenellus is 

 much more common than H. dispar, the two species have nearly 

 the same range; H. stipitatus is confined to the northeastern 

 part of this range. All the specimens in the New York Botanical 

 Garden Herbarium are cited under the original description and 

 need not be repeated here. 



10. Homalobus strigulosus Rydb. Macbride has reduced 

 this to Astragalus tenellus forma strigulosus. An additional 

 specimen is here recorded: — 



Utah: Jugtown, Jcnes 5400. 



11. Homalobus Standleyi sp. nov. 



Astragalus tenellus var. dementis Macbride, Contr. Gray Herb. 



11. 65: 35 (in part). 1922. 



A perennial, with a caespitose caudex; stems 2-3 dm. high, 

 sparingly strigose; stipules deltoid, about 2 mm. long, connate; 

 leaves 3-5 cm. long; leaflets nine to fifteen, elliptic or oblong, 

 5-10 mm. long, 2-3 mm. wide, glabrous above, strigose beneath; 

 racemes lax, 4-7 cm. long, including the short peduncle; bracts 

 lance-subulate, 1-2 mm. long; calyx strigose, the tube 2 mm. 

 long, the teeth subulate, fully 1 mm. long; corolla white or 

 tinged with purple, the keel purple-tipped; banner 6 mm. long, 

 obovate, slightly retuse; wings 5 mm. long; keel-petals 5 mm. 

 long, with a rounded apex; pod about 1 cm. long, 3 mm. broad, 

 strigose, elliptic-oblong, acute at each end, short-stipitate, the 

 stipe shorter than the calyx-tube. 



Type collected at Ponchuelo Creek, New Mexico, July 4, 

 1908, Standley 4181 (herbarium of the New York Botanical 

 Garden). 



This is closely related to H. strigulosus but differs in the 

 white or purple-tinged (not ochroleucous) corolla, with a de- 

 cidedly purple-tipped keel, and in the narrower pods with much 

 shorter stipes. Macbride thought that this belonged to H. 

 dementis Rydb. and, on account of the similarity of the pod 



