MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 131 



California: (Lake Co.) Bolander, Nos. 33, 169 and 2655, 1863; Mrs. Curran, 1885 

 (Mt. Hamilton) ; Mrs. Brandegee, No. 4. 



g. Horkelia platycalyx. 



Horkelia cajyitata Torr. Pac. R. R. Rep. 4: 84. 1856-7. 



Horkelia Galifornica paudfoliolata Wats. MSS. in Herb. 



Illustrations: Plate 64, f. 1; dissection of flower,/. 2; pistil,/. 3; stamen,/. 4; 

 fruiting hypantliium and calyx, /. 5. 



Stem from a perennial caudex, stout, .5-1 m. high, glandular-pubescent, leafy, often 

 tinged with red. Stipules ovate, 1-2 cm. long, often toothed. Basal leaves several, more 

 or less glandular-puberulent ; leaflets 5-7 pairs, obovate, crenate, 1-2 cm. long. Stem 

 leaves similar but with fewer leaflets. Cyme open and branched. Pedicels rather long, 

 often 2.5 cm. Flowers 15-20 mm. in diameter. Hypanthium glandular-pubescent, sau- 

 cer-shaped, a fourth to a third as deep as wide ; bractlets ovate, a little smaller than the 

 ovate-triangular sepals. Petals oblong or spatulate, exceeding the sepals by about a third. 



This species is nearest related to H. ^mberula and H. cuneata, but differs in the larger 

 size of the plant and in the broad and flat hypanthium. It is a native of Southern and 

 Lower California. The following specimens have been examined : 



California: J. M. Bigelow (Whipple Exp.); Wm. A. Wallace, 1854; G. R. Vasey, 

 1880; S. B. Parish, 1880; Wm. E. Wheelock, 1893 (type). 



Lower California: C. R. Orcutt, No. 840, 1883. 



10. Horkelia puberula (Greene) Rydb. 



Potentilla puberula Greene, Pittonia, 1 : 102. 1887. 



Horkelia puberula Rydb. Bull. Torr. Bot. Club, 25: 55. 1898. 



Illustrations: Plate 65, f. 1-2; dissection of flower, / 3; pistil, / A; stamens, 

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



Stems mostly several from the woody perennial caudex, 3-6 dm. high, branched, 

 finely glandular-pube^julent, leafy. Stipules obovate, often toothed. Basal leaves nu- 

 merous, puberulent or glabrate; leaflets 5-8 pairs, obovate or cuneate-oblong, 1-2.5 

 cm. long, coarsely and deeply toothed. Stem leaves similar but smaller and with fewer 

 leaflets. Cyme open, branched, with rather spreading branches. Pedicels 5-15 mm. 

 long. Flowers about 10 mm. wide. Hypanthium glandular-puberulent, cupulate, about 

 half as deep as wide, in fruit about 8 mm. in diameter; bractlets broadly lanceolate, shorter 

 than the ovate-lanceolate sepals. Petals oblong-spatulate, a little exceeding the sepals. 



