ROSE FAMILY. 279 



branching shrub 3 to 5 ft. high or more; pricliles few, stout, recurved, 

 mostly in pairs below the leaves; leaves pubescent, especially on the 

 lower surface; leaflets 5 or commonly 7, ovate to elliptic, f to ]J in. 

 long; flowers in terminal corymbs, 1 to 1} in. broad; pedicels glandu- 

 lar-pubescent; hips globose, 4 to 6 lines broad, somewhat constricted 

 below the calyx-lobes. 



Comnion everywhere along river and creek banks throughout 

 California, often forming small thickets. Flowering most freely in 

 June, the hips ripe Aug. -Oct. 



3. R. spithamaea Wats. var. Sonomensis. Sonoma Eose. 

 Branches several from the base, erect, mostly simple, 9 to 12 in. high, 

 densely armed with stout straight or slightly recurved prickles; 

 leaflets 5, broadly ovate, 4 to 8 lines long, serrate, with the teeth 

 minutely glandular-denticulate; flowers small, several in a corymb; 

 hips globose, 3 to 5 lines broad; calyx-lobes ovate-lanceolate, glandu- 

 lar-hispid, rather closely erect in fruit. — (R. Sonomensis Greene.) 



Rare montane species, on high dry slopes; Sonoma Co., Greene; 

 Mt. Tamalpais, Jepson; Saratoga, Santa Clara Co., Deny. E. 

 SPITHA.M.EA Wats., Mountain Rose, is found in Trinity Co. 



6. RUBUS L. 

 Ours shrubs, either erect or with long trailing or climbing prickly 

 or unarmed stems and branches. Leaves simple, or pin nately com- 

 pound with 3 to 5 leaflets. Calyx 5-parted, without bractlets. 

 Petals 5. Stamens numerous. Pistils many, crowded on an elevated 

 receptacle, becoming drupelets which are united to each other and 

 form the aggregate fruit called a blackberry or raspberry. , (Latin 

 name, allied to ruber, red.) 



Fruit conical or hemispherical, concave beneath, the drupelets parting 

 from the receptacle as a whole when ripe. 

 Stems unarmed; leaves simple, palmately lobed: var. velutinus of ... . 



1. K. parviflonts. 

 Stems prickly ; leaflets 3-foliolate. 



Flowers red ; leaves pubescent or silky beneath: var. jtfensiesii of . . . . 



2. E. spectabilis. 

 Flowers white; leaves white-tomentose beneath . . . . 3. JJ. leucodermis. 



Fruit oblong, the drupelets persistent upon the receptacle; leaves mostly 3 



to 5-foliolate, a few simple; stems and leaves very prickly 



4. J?, vitifolius. 



1. R. parviflorus Nutt. var. velutinus (Brewer) Greene. 

 Thimble Bekry. Commonly 8 or 4 ft. high; herbage hispid, the 

 pubescence of the petioles and stems more or less glandular; leaves 

 palmately 5-lobed, circular in outline, 3 to 7 in. broad, mucronate- 

 serrate; petioles shorter than the blade; stipules lanceolate, deciduous; 

 flowers about 4 to 7 in terminal corymbs, white (rarely pinkish), 1 to 

 3 in. broad, very variable in the number of sepals and petals; lobes of 

 sepals ovate, terminated by a tail-like or sometimes foliaceous 

 appendage often of nearly the same length; petals elliptic. 



Common along caiion streams in the hill country near the coast: 

 Monterey; Oakland Hills; Napa Mountains; Scmoma Co. and north- 

 ward. May. 



