MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 125 



Leaves green, but slightly silky ; leaflets 8-10 pairs, 1-2 cm. long. 39. E. Webberi. 

 Leaves glandular-pubescent or glabrate. 



Cyme corymbose ; hypantMum cupulate. 



Bractlets linear ; petals spatulate. 40. H. TJtahenais. 

 Bractlets oblong. 



Leaves pubescent ; petals broadly obovate. 41. H. scandidaris. 



Leaves glabrous ; petals oblanceolate. 42. H. lycopodioides. 



Cyme subcapitate ; hypanthium campanulate. 4.3. H. Gordonii. 

 Leaflets mostly bristle-pointed. 



Cyme subcapitate ; hypanthium aboiit 4 mm. in diameter. 44. H. pygmaea. 



Cyme corymbiform ; hypanthium about 3 mm. in diameter. 45. H. Shoekleyi. 



§11. SAXOSAE. 



Stems several from the cauclex, rather leafy, with open rather few-flowered cymes. 

 Hypanthium saucer-shaped. Petals obovate or oblanceolate, clawed. Stamens 5-30. 

 Leaves with comparatively few leaflets, which are broadly obovate to reniform-flabelli- 

 form, coarsely toothed or incised. 



Leaflets obovate or orbicular ; stamens 5-10. 46. H. Baileyi. 



Leaflets reniform-flabelliform ; stamens 20-30. 47. H. saxoaa. 



§ I. CALIFORNICAE. 



I. Horkelia frondosa (Greene) Rydb. 



Potentilla frondosa Greene, Pittonia, 1 : 30.0. 1889. 



Greene, Flora Fran. 1 : 66 ; Man. Bay Reg. Bot. 116. 



Horkelia frondosa Rydberg, Bull. Torr. Bot. Club, 25 : 54. 1898. 



Illustrations: Plate 56, f. 1; basal leaf, /. 2; dissection of flower,/. 3; pistil, 

 /. 4; stamens,/. 5 ; fruiting hypanthium and calyx,/ 6. 



Stem stout from a perennial root, erect or decumbent, .5-1 m. high, densely glan- 

 dular-hirsute and heavy scented, leafy throughout. Stipules ovate, about 1.5 cm. long. 

 Leaves pinnate, the lower with 3-4, the upper with 1-3 pairs of leaflets, more or less 

 glandular-villous ; leaflets ovate to oblong, 3-5 cm. long, doubly serrate with mostly 

 rounded teeth, the upper generally more or less confluent. Cyme spreading and leafy; 

 pedicels very short, 1-3 mm. long, seldom longer. Hypanthium campanulate, in fruit 5-6 

 mm. in diameter, more or less tinged with brown ; bractlets ovate, 3-5 mm. long, generally 

 3-toothed at the apex, spreading, a little exceeding the triangular-lanceolate sepals, which 



