MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 141 



California: E. L. Greene, No. 765, 1876; Mary K. Curran, 1887; Lemmon and 

 wife, 1889. 



Oregon: E. Hall, No. 133, 1831; Howell, 1887; 1889; J. W. Marsh, 1878. 



25. Horkelia caruifolia Rydberg. 



Horhelia caruifolia Rydb.; Howell, Fl. N. W. Am. 1: 181. 1898. 



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

 fruiting hypanthium and calyx, /. 5. 



Caudex scaly. Stem slender, strict, simple, silky-pilose and villous-puberulent, but 

 not at all glandular. Stipules pectinately dissected into very narrowly linear segments, 

 those of the basal leaves twice dissected into nearly filiform curled and hairy segments. 

 Leaves pinnate, sparingly silky-pilose, the rachis with divergent hairs; leaflets 6-10 

 pairs, 1-2 cm. long, finely dissected into narrowly linear segments. Cyme rather dense, 

 and pedicels very short. Hypanthium silky-villous, cupulate, 5-7 mm. in diameter ; 

 bractlets linear, shorter than the broadly lanceolate acute sepals. Petals broadly spatu- 

 late or obcordate, with a claw, a little exceeding the sepals. 



A very rare plant, collected, as far as I know, in one locality only. 



Oregon (near Ashland): Thomas Howell, Nos. 685 and 1129, 1887; Mrs. K M. 

 Austin, No. 256, 1893. 



26. Horkelia laxiflora (Drew) Rydb. 



Potentilla laxiflora Drew, Bull. Torr. Bot. Club, 16 : 151. 1889. 



Greene, Fl. Fran. 1: 67. 



Horhelia laxiflora Rydb. Bull. Torr. Bot. Club, 25 : 55. 1898. 



Illustrations: Fi,at-e 80, f 1-2 ; dissection of flower, /. 5 ; pistil, /.- .4; stamen,/. 5. 



Caudex covered with densely hirsute scales. Stem rather slender, ascending, sim- 

 ple below, 2-3 dm. high, nearly glabrous. Lower stipules finely divided into filiform, 

 more or less hairy, curled segments, the upper lanceolate, 5-10 mm. long, more or less 

 toothed. Basal leaves many, slightly hairy, in age glabrate, pinnate; leafiets 10-12 

 pairs, cuneate-fiabelliform, cleft at the apex for about half of their length into 2-5 oblong 

 acute divisions. Stem leaves small and few. Cyme open and branched ; branches diver- 

 gent; pedicels 3-10 mm. long. Hypanthium finely puberulent, cupulate, in fruit 3-4 

 mm. in diameter ; bractlets linear, much smaller than the triangular-lanceolate acumi- 

 nate sepals. Petals white, spatulate, exceeding the sepals. Stamens 10 ; filaments white, 

 petaloid-dilated. Pistils few. 



