MEMOIRS FROM THE DEPARTMENT OP BOTANY OP COLUMBIA UNIVERSITY 105 



8g. Potentilla Grayi Wats. 



Poteniilla Grai/i Wats. Proc. Am. Acad. 8 : 560. 1873. 



Bot. Cal. 1 : 179 ; Porter & Coult. Syn. Fl. Col. 37 ; Brew. c& Wats. Bot. Cal. 1 : 179 ; 

 Curran, Bull. Cal. Acad. Sci. 1 : 136; Rattan, An. Key W. Coast Bot. 51 ; Greene, Fl. 

 Fran. 1 : 63 ; Rydb.- Bull. Torr. Bot. (Jlub, 23 : 306. 



Potentilla Clarkiana Kellogg, Proc. Cal. Acad. Sci. 7 : 94. 1876. 



Illustrations: Plate 44,/. 6; dissection of flower, /. 7; stamen,/. 8 ; pistil,/. 9 ; 

 fruiting hypanthium and calyx, f. 10. 



Somewhat tufted. Stems subscapose, 5-15 cm. high, minutely strigose or glabrous, 

 few-flowered. Stipules ovate, acute, entire or often few-toothed. Leaves basal, pinnate 

 with the middle leaflet long-petiolate, sparingly hirsute or glabrate, shining ; leaflets 1-2 

 cm. long, very broadly obovate or sometimes nearly orbicular in outline, entire at the 

 base, upwards coarsely 5-7-toothed, Avitli the terminal tooth generally smaller. Flowers 

 on slender pedicels, about 1 cm. in diameter. Hypanthium strigose, in fruit 7-8 mm. 

 in diameter ; bractlets ovate or oval, generally obtuse and only half as long as the ovate, 

 generally acute sepals. Petals orbicular or broadly ovate, slightly retuse, longer than 

 the sepals. 



In this species the leaflets are only three, broadly ol )Ovate or nearly orbicular. The 

 habit of the plant reminds one somewhat of P. flabellifoUa, but the middle leaflet is con- 

 siderably stalked, showing that the leaf is pinnate with only one pair, rather than ter- 

 nate. As the style is of the same form and the same place of attachment as in P. hrevi- 

 folia, it is better to let the two constitute a group by themselves, especially as the habit 

 and flower are nearly the same. P. Grayl has been collected only in the mountains 

 around the Yosemite valley, California, at an altitude of 7000-10000 feet. 



California; A. Gray, 1872; A. Kellogg; H. N. Bolander, No. 4971, 1866; W. H. 

 Brewer, No. 1685, 1863; J. W. Congdon, 1885, No. 196, 1896; Galen Clarke; J. G. 

 Lemmon, No. 84 (in part), 1875. 



§ i8. MULTIJUGAE. 



go. Potentilla millefolia Rydberg. 



Potentilla millefolia Rydberg, Bull. Torr. Bot. Club, 23: 433. 1896. 



Illustrations: Bull. Torr. Bot. Club, 23: pi. 277, f 1-5. Plate 4S,f 1; fruiting 

 hypanthium and calyx, /. 2; dissection of flower, / 3; stamen, / 4; pistil, /. 5. 



Low, prostrate or spreading; stems numerous from the caudex, about 1 dm. long, 

 few-leaved, only a little exceeding the basal leaves, appressed-strigose, often sparingly so. 

 Lower stipules lanceolate and scarious and brown, the upper ovate-lanceolate, acute or 



