140 MEMOIRS FROM THE DEPARTMENT OF BOTANY OP COLUMBIA UNIVERSITY 



Illustrations: Plate 77, f. 1; dissection of flower, /. 2; pistil, /. 3; stamen, /. 4; 

 fruiting hypanthium and calyx, /. 5. 



Caudex scaly and very hirsute. Stems about 3 dm. high, strict and simple, some- 

 what striate, hirsute with long spreading hairs, a little glandular above. Stipules pecti- 

 nately divided into linear segments, those of the basal leaves very finely dissected and 

 very hairy. Basal leaves numerous, pinnate, silky-pubescent, the rachis long-hirsute ; leaf- 

 lets 5-9 pairs, cuneate or oblong-cuneate, 1-2 cm. long, 3-5-toothed at, the apex, with 

 oblong acute teeth. Stem leaves similar but with nearly linear leaflets. Cyme very 

 dense and flowers subsessile. Hypanthium cupulate, about half as deep as wide, about 

 5 mm. in diameter, silky-hirsute ; bractlets linear, nearly fihform, a little shorter than 

 the lanceolate or ovate-triangular sepals. Petals white, broadly spatulate, a little ex- 

 ceeding the sepals. 



A rare plant, growing in the interior of Oregon and northern California. The 

 following specimens belong to this species : 

 Oregon: Nuttall; T. Howell, 1881. 



California: Wilkes' Exp., No. 1145; C. C. Parry, 1887; Douglas. 



24. Horkelia daucifolia (Greene) Rydb. 



Horkelia congesta Brew. & Wats. Bot. Cal. 1: 181. In part. 1876. 



PotentiUa daucifolia Greene, Pittonia, 1: 160. 1888. 



Potentilla congesta var. lobata Lemmon, Bull. Torr. Bot. Club, 16 : 221. 1889. 



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



Illustrations: Plate 79 ; f. 1-2; dissection of flower,/. 3; stamen,/. 4.; pistil, 

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



Caudex covered with densely pubescent scales. Stem about 3 dm. high, strict and 

 mostly simple, pilose with long fine hairs and glandular throughout. Stipules pectin- 

 ately divided into linear segments, those of the basal leaves finely twice dissected into 

 nearly filiform, hairy, more or less curled segments. Leaves pinnate, sparingly silky- 

 pilose, the rachis with long spreading hairs ; leaflets 8-12 pairs, 1-3 cm. long, divided 

 to near the base into linear acute segments. Cyme more open than in H. hirsuta; pedi- 

 cels 3-10 mm. long. Hypanthium silky-pilose, cupulate, in fruit about 8 mm. in diam- 

 eter ; bractlets linear, nearly subulate, a little shorter than the broadly lanceolate 

 sepals. Petals cream-color, spatulate-oblong, a little exceeding the sepals. 



It is evidently nearly related to both the preceding and the following species, and is 

 apparently more common than either, especially in the Klamath region of California 

 and Oregon. 



