118 ROSACES. 



* Stems prickly; leaves 3-foliolate. 



2. R. spectabilis, Pursh. Stoutish, 510 ft. high, sparingly armed 

 with stout straight prickles: leaves occasionally simple: leaflets ovate, 

 acute or acuminate, doubly serrate, often more or less lobed, the veins 

 beneath and the stalks and stalklets sparingly villous:/. 1 3, large, 

 red: fr. large, ovoid, red or yellow, glabrous. Var. Men/iesii, Wats. 

 Foliage somewhat tomentose and silky. Mendocino Co., Bolander, 

 northward, in moist woods. The variety is of the San Francisco district, 

 growing on wooded banks of streams, mostly near the sea. April June. 



* * Fruit persistent on the elongated receptacle. 



3. R. yitifolius, Ch. & Schl. Stems woody, very prickly and glaucous, 

 weak and trailing or suberect, 520 ft. long: leaves pinnately 3 5-f olio- 

 late; leaflets ovate to oblong, coarsely toothed, glabrous or more or less 

 pubescent or tomentose: stipules oblanceolate to linear: fl. imperfect; 

 staminate large, with elongated petals; pistillate small, with petals short 

 and relatively broad: fr. oblong, black and sweet.Very common on 

 banks of streams throughout the Coast Range and in the interior. Fl. 

 Jan. April; fr. May, June. 



11. ROSA, Varro (WILD ROSE). Prickly shrubs with unequally 

 pinnate leaves, adnate stipules and solitary or corymbose large flowers. 

 Calyx-tube globose or urceolate: limb 5-parted; bractlets 0. Petals 5, 

 rounded, spreading. Stamens GO, on a thickened margin of the silky 

 disk which lines the calyx-tube. Pistils oo ; ovaries free and distinct; 

 stylessubterminal; ovules solitary, pendulous. Fruit of osseous achenes 

 enclosed in the fleshy-enlarged red berry-like calyx-tube. 



* Calyx-lobes deciduous from the fruit. 



1. R. gymnocarpa, Nutt. Slender, 1 4 ft. high, armed with scat- 

 tered slender and weak straight prickles: leaflets 59, rather remote, 

 glabrous, oval, sharply doubly serrate, % 1 in. long: fl. 1, 2 or 3, barely 

 1 in. broad: calyx-lobes ovate, with few or no appendages: fr. 35 lines 

 long, oval or oblong, nearly or quite closed at summit : seeds few, smooth. 

 Common in shady places, near streams and on bushy northward 

 slopes. March May. 



* * Calyx-lobes persistent. 



2. R. Sonomensis, Greene. Slender, 1 ft. high, with many very 

 leafy branches well armed with straight prickles: stipules short, almost 

 truncate, narrow, the margin closely glandular-ciliolate, at length re vo- 

 lute: leaflets 5, remote, broadly ovate or nearly orbicular, truncate or 

 somewhat cordate at the slightly inequilateral base, % % in. long, the 

 margin evenly and coarsely serrate, the serratures minutely glandular- 

 denticulate, both surfaces glabrous: fl. many, small, in dense terminal 



