Ig4 ROSACEA. Ivesui. 



In the Sierra Nevada, from Mt. Brewer {B reiver) aiul Mt. Pinos [RuUirocky to Lake Taliuc;, 

 Lemmon. 



7. I, gracilis, Tt' IT. k. Cmy. Caiiuscontly villous witli spmnliu},' liiiirs : stems 

 sloiidur, ii aiKtii hi^li, from an aiipurently annual or hicnnial root: Iwillcls 5 to 10 

 pairs, scattonul on Mio slumlor rlia(;liia, li - ^-ihuUhI with oblong' s('-,MUonts, 2 to 4 lines 

 long : (lowers on elongated peilicols in a very diiruse i)anicle : ealyx nearly 2 lines 

 long, broadly eanipanuluto ; bractlets nearly equalling the lubes : petals white, 

 obo°'ate, as long as the calyx : stamens If) or 20 : carpels numerous : aUenes rugose. 

 — Pacif. R. liep. vi. 72, t. 11. rotentUla Newherrijl, CJray, 1. c. 532. 



On the banks of Hliett Lake, Newberry. A species peeuUar in its annual or biennial root and 

 in the lar{,'e number of its eari)els. 



8. I. Baileyi, Watscui. Viseidly pubescent : steins slender, G inches liigh : leaf- 

 lets 3 to 10 pairs, cuneate-obovate, 3 - 7-tootluHl or parted : llowers on slender pedi- 

 cels in a dilluse panicle : calyx U lines long, exceeding the yellow spatulate petals: 

 stamens 5 : carpels 1 to 5. — JJot. King Exp. UO. 



V;ir. setosa, Wutson, 1. c. Leallets all parted, the lubes setosely tipped : more 

 glandular-huiry. 



West Hnmboldt Mountains, Nevada (i?(u'%) ; the variety in the East Humboldt Mountains, 

 Watson. The remaining species also belong to this group. 



I. KiNOli, Watson, 1. e. i)l. Glabrous throughout : stems a span long or more : leallets numer- 

 ous, entire or "2 - H-parted, the lobes roumled, u lino long : llowers on slender pedicels in an open 

 panicle : caly.v 2 lines long, shorter than the while orbicular petals : stamens 16 or '20 : carpels 

 5 to 8. — Valleys of Northeastern Nevada, in alkaline soil, Walson. 



I. DEPAUPKKATA, Gray in herb. Sparingly pubescent : stems erect, a foot high or more : leaf- 

 lets numerous, cuneate-obovate or olilong, deeply 2 - 3-cleft : flowers pedicelled, in a rather open 

 panicle : calyx 2 or 3 lines long, ))urple within, exceeding the linear dark-purple petals : stamens 

 5, purple : carpels 2. — Putenlilla depaiiperata, Engelm. ; (-ray, Proc. Am. Acad. vii. 309. San 

 Francisco Mts., Arizona, Anderson, Palmer, Luew. The only purple-Howeied species. 



18. ADENOSTOMA, Hook, k Arn. Chamiso. 

 Calyx persistent, r)-lob()d, calyculate ; tube obconical, 10-ribbed ; lobes membra- 

 naceous, broad. Petals f), orbicular, spreading. Stamens 10 to 15, usually 2 or 3 

 together between the petals. Ovary simple, ubliquely oljovoid, the oblique or trun- 

 cate summit pubescent : style lateral, curved, with an obliquely dilated stigma : 

 ovules 1 or 2, suspended. Fruit a membranaceous akene, coriaceous at the summit, 

 included in the indurated calyx-tube. Seeds unknown. — Evergreen shrubs, some- 

 what resinous; leaves thick and ttoriaceous, small and numerous, entire, solitary and 

 rarely opposite, or fascicled ; stipuliis small ; llowers small, white, shortly iicduncu- 

 late in terminal racemosi; jjauicles. 



1. A. fasciculatum, Hook. cSj Arn. A dill'usely branched shrub, 2 to 20 feet 

 bigh, with reddish virgate branches, and grayish bark becoming shreddy : leaves 

 fascicled, linear-subulate, 2 to 4 lines long, acute, usually channelled on one side, 

 smooth and often resinous, rarely lobed above ; stipules small, acute: llowers nearly 

 sessile, rather crowded : calyx green, nearly a line long, much exceeding the calycu- 

 late bracts, strongly nerved, the lobes much shorter than the small ])ctals : ovary 

 obliquely truncate, often 1-ovuled: stigma small. — Bot. Beechey, 139, t. 30 ; Torr. 

 & Gray, El. i. 430. 



Var. obtusifolium, Watson. Leaves short, obtuse : branchlets usually puber- 

 ulent. — A. brcvifuiia, Nutt. 



Abundant on dry soils in the Coast Ranges and more rarely in the foot-hills of the Sierra 

 Nevada, from S. California to Lake Co. (Turrcij) and Sierra Co., Lemmon. The variety near San 

 Diego. It is usually 6 or 8 feet high, often covering extensive areas with a dense and almost 

 impenetrable chapparal or "ehamisal," producing an ettect upon the landscape similar to that 

 of the heaths of the Old World. 



