Rydberg: .Species from Western United States 543 ■• 



petals and the shorter hairs of the receptacle. It resembles also: 

 P. m'^//V somewhat in habit and leaves, but it has a thick perenv 

 nial caudex, much more numerous stamens and filiform style. 



California: 29 Palms, Colorado Desert, \'^c)'^, A. H. Alvcr- 



* 



son (type in the herbarium of 1\ S. Brandcgce), 



1 



Horkelia chaetophora 



Caudex stout, covered with the remains of leaf-stalks and 

 stipules from former years ; stems several,' 1-1.5 dm. hi^di, almost 

 scapose, finely puberulcnt ; basal leaves numerous, about i dm. 

 long, with 15-20 pairs of leaflets; their stipules broad, brown, 

 obtuse, bristly ciliatc ; leaflets 3-5 mm. lon<,^ divided to near the 

 base into linear-oblong segments, densely puberulcnt and tipped 

 with bristles ; cyme rather many-flowered and open ; hypanthium 

 5-7 mm. in diameter, puberulcnt and hirsute; bracUets lincar-ob- 

 lonc one third shorter than the broadly lanceolate acute sepals ; 

 petals yellow, oblong, about equaling the sepah; stamens 10; 

 filaments filiform ; pistils about 20. 



This is intermediate between H. Utahcnsis and H. pygmaca. It 

 resembles the former most in habit and flowers, but has the bristles 

 and obtuse stipules characteristic to //. pyguiaca. From the latter 

 it differs in the larger size of the plant and flower and the many- 

 flowered and open cyme. It grows in rocky places in the moun- 

 tains at an altitude of 3000-3400 m. 



California : Farewell Gap and Little Kern River, Tulare Co., 

 1896, C. A. Purpus, T4og ; Keweah Peak, 1895 (both in the her- 

 barium of T. S. Brandegee). 



Horkelia Congdonis 



Perennial with a woody caudex ; stems erect, 3-4 dm. high, 

 few-leaved, somewhat branched above, glandular puberulcnt ; basal 

 leaves 1-1.5 dm. long, with 30-40 pairs of leaflets ; stem-leaves 

 similar but smaller ; upper stipules deeply cleft ; leaflets 3-5 mm. 

 long, cleft to the base into 4-5 oblong divisions, obtuse, glandular 

 puberulcnt ; cyme with a few ascending branches and short -pedi- 

 celed flowers; hypanthium campanulate, "j-Z mm. in diameter, 

 glandular puberiilent ; bractlets lanceolate, one half or two thirds 

 the length of the lanceolate acuminate sepals ; sepals almost equal- 

 ing the sepals, oblong, obtuse; stamens 20; filaments slightly 

 dilated, subulate ; pistils numerous. 



This is nearest related to Horkelia purpurascens, but differs in the 



