Ivesia. ROSACES. 



t 



ish, spatulatc, equalling the calyx : stamens 20 : carpels 4 to 6. Bot. Wilkes Exp. 

 288, t. 4; Gray, 1. c. 531. 



On the Klamath River (Pickering} ; Sierra Valley, Lemmon. 



2. I. unguiculata, Gray. Closely resembling the last, sometimes less densely 

 villous : cymes less crowded : calyx 2 or 3 lines long, with narrow acuminate lobes 

 and bractlets : petals white, uuguiculate, the blade orbicular, somewhat exceeding 

 the calyx: stamens usually 15 : carpels 5 to 8. Proc. Am. Acad. vii. 339; "Watson, 

 1. c. 448. 



Yosemite valley (Bolander, Gray) ; Sierra Co., Lemmon. 



3. I. Webberi, Gray. Low, loosely villous with spreading hairs : leaflets 4 to 

 6 pairs, approximate, 2 5-parted, with linear segments, 3 to 5 lines long : stems 

 nearly naked, smooth above : flowers mostly on long pedicels in rather loose cymes : 

 calyx 2 or 3 lines long ; lobes lanceolate ; bractlets small : petals yellow, narrowly 

 oblong, about equalling the calyx : stamens 5 to 10 : carpels 3 or 4 : akenes large, 

 ovate, a line long or more Proc. Am. Acad. x. 71. 



Sierra and Indian valleys, in ravines, Webber, Lemmon. 



* * Flowers yellow, in a rather compact cyme upon a nearly naked stem : low or 



dwarf, alpine. 



4. I. G-ordoni, Torr. & Gray. Viscid-pubescent and often somewhat hirsute, 

 or glabrate : stems 3 to 10 inches high from a thick resinous caudex : leaflets 

 numerous, approximate, 1 to G lines long, obovate, 3-5-cleft or parted, with oblong 

 or spatulate segments ; cauline leaves one or two, pinnatifid : flowers in a close cyme, 

 at length somewhat open : calyx 2 or 3 lines long : petals yellow, narrowly oblong 

 to broadly spatulate, usually not exceeding the calyx : stamens 5 : carpels 2 or 3, 

 or more. Pacif. R. Rep. vi. 72 ; Gray, Proc. Am. Acad. vi. 530 ; Watson, Bot. 

 King Exp. 90. Horkelia Gordoni, Hook, in Kew Jour. Bot. v. 341, t. 12. H. (?) 

 multifoliolata, Torr. in Sitgreaves Rep. 159. 



Var. pygmaea, Watson. Much reduced, an inch or two high or even less, 

 glandular and hirsute : leaflets very small and crowded : stamens sometimes 10. 

 /. pycfmwa, Gray, 1. c. 531. 



Var. lycopodioides, Watson. Nearly glabrous : leaflets still more crowded and 

 imbricated, thick and rounded. /. lycopodioides, Gray, 1. c. 530. 



In the Sierra Nevada from Mono Pass (Breiver) to Sierra Co. (Lemmon), and in the mountains 

 of Wyoming, Utah, and Arizona. The varieties in the higher Sierra Nevada, at 11,000 to 12,000 

 feet altitude. 



5. I. Muirii, Gray. Dwarf, densely silky-villous : stems an inch high, from a 

 thick caudex : leaves terete with the very numerous small crowded and imbricated 

 silky leaflets : flowers small, in a close cyme : calyx a line long, purplish, exceeding 

 the narrow spatulate " yellow " petals : stamens 5 ; filaments short : carpels usually 

 two. Proc. Am. Acad. viii. 627. 



On Mt. Hoffmann, at 9,000 feet altitude, John Muir. Except for the reduced number of 

 stamens and shorter filaments it would be referred to /. santolinoides. 



* % * Flowers in a diffuse panicle : stems leafy. 



6. I. santalinoides, Gray. Stems 6 to 18 inches high, slender, sparingly 

 villous : leaves densely silky-villous with white hairs, 2 to 4 inches long, terete 

 with the very numerous small crowded and imbricated leaflets : panicle very dif- 

 fusely branched; bracts very small, villous : flowers on slender at length elongated 

 pedicels : calyx a line long, villous or nearly glabrous, o'ften purplish ; bractlets 

 short : petals white, spatulate to obovate, exceeding the calyx : stamens 15 ; fila- 

 ments long and slender ; anthers purple : carpels solitary. Proc. Am. Acad. vi. 

 531 & vii. 339. 



