MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 143 



mostly entire. Basal leaves many, densely white silky- villous, pinnate, with 10-18 very 

 crowded pairs of small leaflets .5 cm. long, which are ovate-oblong and entire, or 

 cleft to the base into 2-3 similar segments. Stem leaves similar but smaller. Cyme few- 

 flowered and contracted. Hypanthium cupulate, densely silky, 3-4 mm. in diameter ; 

 bractlets linear, shorter than the lanceolate sepals. Petals obcordate, unguiculate, much 

 exceeding the sepals, white. 



This plant is not very nearly related to any of the other Horkeliae. It comes perhaps 

 nearest to H. Howellii, but lacks the open cyme and dissected stipules of that species. 

 Only the specimens from the original collection are known. 



Oregon: T. Howell, 1884 (Coast Mountains, Curry Co.). 



§7. PURPURASCENTES. 



29. Horkelia pinetorum (Coville) Rydb. 



Potentilla purpurascens pinetorum Coville, Proc. Biol. Soc. Wash. 7: 77. 1892. 



Coville, Cont. U. S. Nat. Herb. 4 : 96. 



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



Illustrations: Plate 82, f. 1; dissection of flower, /. 2; pistil, /. 3 ; stamens, /. 4-; 

 fruiting hypanthium and calyx, /. 5. 



Caudex cespitose from a deep woody root. Stem glabrous, about 3 dm. high, slen- 

 der and somewhat branched. Stipules ovate, entire, about 5 mm. long. Basal leaves 

 numerous, 1-1.5 dm. long, pinnate, with 15-20 pairs of thin glabrous leaflets which are 

 5-7 mm. long and divided to near the base into 2-4 broadly oblong segments. Stem 

 leaves minute. Cyme open with ascending branches. Hypanthium deeply cupulate or 

 nearly campanulate, hairy, tinged with brown or purple. Bractlets oblong or ovate, 

 erect, about a third the length of the reflexed lanceolate sepals. Petals spatulate, 

 white, slightly exceeding the sepals. 



This was first described as a variety of H. purpurascens, but although related to it, 

 it is without any doubt a good species. It is, according to Coville, common in pine 

 woods on the North Fork of Kern River. 



California: Coville& Funston, No. 1579, 1891. 



30. Horkelia purpurascens Wats. 



Horkelia purpurascens Wats. Proc. Am. Acad. 11: 148. 1876. 



Brewer & Wats. Bot. Cal. 1: 182; Rothrock, Wheeler's Exp. 4 : 360; Rattan, An. 



Key W. Coast Bot. 52. 



Potentilla purpurascens Greene, Pittonia, 1: 105. 1887. 



