MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 25 
Leaves green, but slightly silky ; leaflets 8-10 pairs, 1-2 cm. long. 39. H. Webberi. 
Leaves glandular-pubescent or glabrate. 
Cyme corymbose ; hypanthium cupulate. 
Bractlets linear ; petals spatulate. 40. H, Utahensis. 
Bractlets oblong. 
Leaves pubescent ; petals broadly obovate. 41. H. scandularis. 
Leaves glabrous ; petals oblanceolate. 42. H. lycopodioides. 
Cyme subeapitate ; hypanthium campanulate. 3. H. Gordonii. 
Leaflets mostly bristle-pointed. 
Cyme subeapitate ; hypanthium about 4 mm. in diameter. 44. H. pygqmaea. 
Cyme corymbiform ; hypanthium about 3 mm. in diameter. 45. H. Shockleyi. 
Sir, SAXOSAE. 
Stems several from the caudex, 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. Bailey. 
Leaflets reniform-flabelliform ; stamens 20-30. 47. H. saxosa. 
§ 1, CALIFORNICAE. 
1. Horkelia frondosa (Greene) Rydb. 
Potentilla frondosa Greene, Pittonia, 1: 300. 1889. 
Greene, Flora Fran. 1: 66; Man. Bay Reg. Bot. 116. 
Horkelia frondosa Rydberg, Bull. Torr. Bot. Club, 25 : HARE SOS: 
InLustRATiIons: Puare 56, f. 1; basal leaf, f. 2; dissection of flower, f. 3; pistal, 
f. 4; stamens, f. 5; fruiting hypanthium and calyx, f. 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 1-5 pairs of leaflets, more or less 
glandular-villous ; leaflets ovate to oblong, 8-5 em. 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 
