R0SACE2E. 117 



9. P. Micheneri, Greene. Stems 6 — 8 in. high, tufted, reddish, and, 

 with the younger leaves, somewhat villous, the mature herbage glabrous : 

 leaflets in about 15 pairs, small and crowded, 5 — 7-parted into oblong 

 obtuse entire segments: young eymes compact; petals cuneaie-obcordate, 

 exceeding the calyx, white: all 10 stamens with oblong-petaloid white 

 filaments, the alternate ones smaller. — Southern flanks of Mt. Tamalpais. 



9. FRAGtARIA., Brunfels (Stbawbebry). Perennial stoloniferous 

 herbs with 3-foliolate leaves; the leaflets coarsely toothed: scapes 

 cymosely oo -flowered. Flowers as in Potentilla, but the numerous 

 achenes borne on an enlarged pulpy edible receptacle. Petals white. 



* Leaves light-green, of thin texture; achenes superficial. 



1. F. Californica, Oh. & Sehl. Often 10 in. high, commonly smaller: 

 leaflets cuneate-obovate, rounded, sparingly villous on both sides : scapeB 

 and petioles slender: fl. J£ in. broad; calyx-teeth and often the petals 

 also more or less toothed: fr. small, globose. — Common along the sea- 

 board; preferring wooded or bushy slopes. 



* * Leaves dark-green, of firmer texture; each achene inserted in a small 

 depression of the receptacle. 



2. F. Chilensis, Ehrh. Dioecious: scapes and petioles short; leaflets 

 cuneate-obovate, nearly glabrous and somewhat shining above, villous 

 beneath: fl. 1 in. broad. — Sandy banks and grassy slopes near the sea. 



10. RUBUS, Vergil. Shrubs with stems unarmed or prickly, erect, 

 reclining or prostrate. Leaves simple and lobed, or compound; stipules 

 adnate. Flowers white or red, solitary, corymbose or panicled. Calyx 

 persistent, 5-labed, without bractlets. Petals (5) and stamens (oo ) peri- 

 gynous. Pistils 2— oo , crowded on an elevated receptacle, ripening into a 

 coherent body of small drupes, so forming the aggregate fruit called a 

 raspberry or blackberry. 



* Fruit concave beneath, parting freely from the receptacle. 



h— Unarmed; leaves ample, palmalely lobed. 



1. R. parviflorus, Nutt. Erect, 3—8 ft. high; the bark of the main 

 stem becoming brown and shreddy; branchlets and pedicels hirsute and 

 more or less glandular-hispid: leaves membranous, 4—12 in. broad, 

 irregularly serrate, the 3—5 lobes acute or acuminate: fl. few, in loose 

 terminal clusters, white or pinkish, 1—2 in. broad: carpels oo , tomentose; 

 fr. hemispherical, scarlet when ripe, "sweet and pleasantly flavored." 

 Var. velutinus, Greene. Leaves smaller, of much firmer texture, 

 densely velvety-pubescent, evenly serrate: fr. dry, insipid.— The type is 

 found only in the mountains of the interior or easterly parts of the 

 State. The variety belongs to the seaboard, where it is common. Fl. 

 March; fr. June. 



