118 ROSACEA. 



+- *~- Stems prickly; leaves 3-foliolate. 



2. R. spectabilis, Pursh. Stoutish, 5—10 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. Menziesii, 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. vitifolius, Oh. & Schl. Stems woody, very prickly and glaucous, 

 weak and trailing or suberect, 5 — 20 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 ao ; ovaries free and distinct; 

 styles subterminal; 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 5 — 9, rather remote, 

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

 1 in. broad: calyx-lobes ovate, with few or no appendages: fr. 3 — 5 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 welt armed with straight prickles: stipules short, almost 

 truncate, narrow, the margin closely glandular-ciliolate, at length revo- 

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

 somewhat cordate at the slightly inequilateral base, J£ — J£ in. long, the 

 margin evenly and coarsely serrate, the serratures minutely glandular- 

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



