Purshia. ROSACEyK. jy3 



ratlicr slendrr prickles, somGwhat glaucous : loaves 3-foliolate, rarely S-foliolate, 

 often simple and 3-lol)e(l on the llowering branchlcts ; leallets ovate to oblong, 

 coarsely toothed, smooth or m()re or less pubescent or tomentose ; veins, petioles, 

 peduncles, and calyx aculeate with slender prickles ; stipules oblanceolate to linear, 

 often long and toothed : calyx-lobes ovate-lanceolate, acuminate, or often foliaceously 

 tipped and exceeding the petals : fruit oblong, sweet. — Linnaea, ii. 11. R. macro- 

 pefalus, Dougl. ; Hook. Fl. i. 178, t. 59. R. viti/olius, Cham. & Schlecht. 1. c, the 

 simple-leaved form. 



Frequnnt in tlio Coast Ranges from Santa Ikrliani and Ventura countios (Ojai, Ooodnle) to 

 Fraaer River ; also in Idalio. A very variable hikmIch. 



6. CHAM^BATIA, Benth. 

 Calyx persistent, turbinate-canipanulate, 5-lobed. Petals 5, spreading. Stamens 

 very numerous, in several rows on the throat of the calyx, short. Carpel solitary, 

 smooth : style terminal, villous at base, deciduous : stigma decurrent : ovule solitary, 

 orcct. Fruit a coriaceous ol)()void akono, included. Seed with a spongy testa and 

 small albumen: radicle inferior. — A glandular-pubescent fragrant shrub; leaves 

 thrice pinnate with numerous minute leaflets ; flowers white, in a loose cyme. 



1. C, foliolosa, Benth. An erect shrub, a foot or two high ; branches numer- 

 ous, slender, leafy, glandular-pubescent and viscid throughout, the outer integument 

 soon deciduous, leaving a smooth dark-brown bark : leaves ovate or oblong in out- 

 line, 2 or 3 inches long, finely dissected ; leaflets usually glandular-tipped ; stipules 

 small, linear : cymes few-flowered, terminating the young branches ; bracts leafy, 

 toothed or pimiatilid : calyx densely glamlular-hairy, villous within, the ovate acu- 

 minate lobes as long as the tube or at length longer : petals white, obovate, 3 or 4 

 lines long : akene nearly filling the calyx, abruptly acute. — PI. llartw. 108 ; Torrey, 

 PI. Fremont. 11, t. G; Hook. Dot. Mag. t. 5171. 



On the western slope of the Siorra Nevada, at 3,000 to 7,000 feet altitude, from Mariposa Co. 

 to Nevada Co., flowering from May to July. It is very abundant in some places, fdling the air 

 with its strong resinous rather disagreeable odor. 



7. PURSHIA, DC. 



Calyx persistent, funnel shaped, S-lobed. Petals 5, exceeding tlie calyx-lobes, 

 yellow. Stamens about 25, in one row. Carpels solitary, sometimes 2, narrowly 

 oblong, attenuate into the persistent stylo : stigma decurrent : ovule solitary, erect. 

 Fruit a coriaceous akene, pubescent, attenuate at each end, exserted. Seed oblong- 

 obovate, without albumen, the thin seed-coats separated by a layer of dark-purple 

 intensely bitter resinous matter: radicle inferior. — A diffusely branched shrub; 

 leaves mostly fascicled, cuneate, 3-lobed : flowers solitary, terminal on the short 

 branchlcts. 



1. P. tridentata, DC. Usually 2 to 5 (rarely 8 or 10) feet high, with brown 

 or grayish bark; the young branches and mimerous short branchlets pubescent: 

 leaves cuni^ate-obovate, 3 to 12 lines long, 3-lobed at the apex, petioled, white- 

 tomentoso beneath, greener above ; stipules short : flowers iiearly sessile : calyx 2 to 

 4 lines long, tomentose with some glandular hairs, the oblong obtuse lobes shorter 

 than the tube; petals spafulate-obovatc, 3 to 5 lines long: fruit half an inch long. 

 — Hook. FI. i. 170, t. 58; l.indl. P.ot. If.-g. t. IMG; T(.rr. iV: Crav, FI. i. 428; 

 Watson, P>ot. King Fxp. 82. 



Fre(]ncnt tbroui^liont tlin interiov from the eastern slope of tin- Sierra Nevada to tlio Rocky 

 Mountains, and from the British boundary to Arizona and New Mexico. 



