276 NORTH AMERICAN FLORA [Volume 24 



leaflets 1 1-23, linear or oblong, or those of the lower leaves obovate, acute at the base, obtuse 

 to retuse at the apex, 5-15 mm. long, 2-5 cm. wide, short-pubescent on both sides with curved 

 hairs; peduncles 5-12 cm. long; racemes 5-10 cm. long; bracts lanceolate, 3-4 mm. long; 

 pedicels very short, shorter than the bracts; calyx villous, the tube 7 mm. long, 4—5 mm. broad, 

 gibbous below on the upper side, the upper two teeth triangular, the lower three lanceolate, 2 

 mm. long; corolla pale-yellow; banner obovate, 12-14 mm. long, tapt_ring into the broad claw; 

 wings about as long, the blade oblong, acutish, with a semisagittatc base, shorter than the 

 long claw; keel-petals slightly shorter, the broadly lunate blade rounded at the apex, with a 

 rounded basal auricle, a little more than half as long as the claw; pod short- villous, stipitate, 

 the body linear, nearly straight or slightly curved upwards, 2-2.5 cm. long, 4 mm. broad, acute 

 at each end, the stipe about 8 mm. long; seeds obliquely reniform, fully 2 mm. long, 1.5 mm. 

 broad. 



Type locality: On the subalpine range of the Blue Mountains, Oregon. 

 Distribution: British Columbia to Idaho and Oregon. 

 Illustrations: M. E. Jones, Rev. Astrag. pi. 28, f. 97; pi. 73. 



52. Homalobus californicus (A. Gray) A. Heller, Muhlenbergia 

 2:86. 1905. 



, Astragalus collinus californicus A. Gray. Proc. Am. Acad. 12: 54. 1876. 

 Astragalus californicus Greene, Bull. Calif. Acad. 1: 157. 1885. 



A perennial, with a cespitose caudex; stems 3-6 dm. high, pilose, striate, branched; leaves 

 3-9 cm. long; stipules lanceolate, 3-4 mm. long; leaflets oblong, 5-20 mm. long, 2-6 mm. wide, 

 pilose on both sides or glabrate above, obtuse to retuse at the apex; peduncles 6-8 mm. long; 

 racemes 3-6 cm. long; bracts lanceolate, 3 mm. long, longer than the pedicels; calyx villous 

 with mixed dark and light hairs, the tube 4-5 mm. long, 3-4 mm. broad, gibbous below on the 

 upper side, the upper two teeth deltoid, the lower three subulate, 1 mm. long; corolla ochro- 

 leucous, 12 mm. long, similar to that of H. collinus; pod villous-pilose, stipitate, the stipe 12 

 mm. long, the body 2.5-3 cm. long, 4 mm. wide, nearly straight, often mottled with brown. 



Type locality: Yreka, California. 



Distribution: Northern California. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 2,f. 7; pi. 77, f. 7. 



53. Homalobus Tweedyi (Canby) Rydb. Bull. Torrey Club 



51: 14. 1924. 



Astragalus Tweedyi Canby, Bot. Gaz. IS: 150. 1890. 



Phaca Tweedyi Piper, Contr. U. S. Nat. Herb. 11: 371. 1906. 



A perennial, with a caudex; stem 3-6 dm. high, strigose, striate, branched above; leaves 

 6-10 cm. long; stipules broadly triangular, free, 2 mm. long; leaflets 13-21, linear, 1-2.5 cm. 

 long, 1-3 mm. wide, short -pubescent on both sides with incurved hairs, obtuse; peduncles 10-15 

 cm. long; racemes in flower 3-6 cm. long, in fruit 5-10 cm. long; bracts lanceolate, 2-3 mm. 

 long, longer than the pedicel; calyx short-villous, the tube 6 mm. long, 3 mm. broad, the upper 

 two teeth triangular, the rest lanceolate, less than 1 mm. long; corolla yellow; banner 12 mm. 

 long, obovate, with a long claw; wings as long, the blade obliquely oblanceolate, scarcely 

 exceeding the claw; keel-petals 8 mm. long, the blade nearly semicircular, rounded at the apex; 

 pod glabrate, stipitate, the stipe 8-9 mm. long, the body arcuate, erect, 15-20 mm. long, 4 mm. 

 wide. 



Type locality: Columbia River, Yakima County. Washington. 



Distribution: East of the Cascades in southern Washington and northern Oregon. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 28, f. 96; pi. 73. 



54. Homalobus Laurentii Rydb. Bull. Torrey Club 51: 15. 1924. 



A perennial, with a cespitose caudex; stems 3-4 dm. high, striate, short-pubescent with 

 incurved hairs; leaves 3-7 cm. long; stipules triangular, 3-5 mm. long; leaflets 7-17, oblong, 

 8-13 mm. long, short-villous on both sides; racemes 1-2 dm. long; bracts lanceolate, 2-3 mm. 

 long ; calyx short-villous, the tube 8 mm. long, gibbous on the upper side, the two upper teeth 



