70 E O S A C E iE. 



16. FRAGtARIA, Brunfeh (Stkawberet). Perennial stoloniferoiis 

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

 cymosely x - flowered. Flowers as in PoteudUa, but the numerous achenes 

 borne on an enlarged pulpy edible receptacle. Petals in all ours white. 



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



1. F. Californica, Ch. & Schl. in -Linnsea, ii. 20 (1827). Often 10 in. 

 high, commonly smaller : leaflets cuneate-obovate, rounded, sparingly 

 villous on both sides : scapes and petioles slender : fl. % ^^- broad ; 

 calyx-teeth and often the jjetals also more or less toothed : fr. small, 

 globose. — Common along the seaboard ; preferring wooded or bushy 

 moist slopes among the more elevated hills. 



2. F. vesca, Linn. Sp. PL i. 494 (1753), partly. Smaller than the 

 preceding : leaflets thinner, more conspicuously veiny : calyx-teeth and 

 petals smaller and entire ; fr. ovoid. — Frequent at middle elevations in 

 the Sierra Nevada only. 



* * Leaves deep or dark green., of firmer texture ; each achene inserted in a 



small dtpression of the receptacle. 



3. F. Cliileiisis, Ehrh. Beitr. vii. 26 (1792). Dioecious : scapes and 

 petioles short, the dark-green coriaceous leaves commonly depressed ; 

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

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

 the sea from the vicinity of San Francisco to Alaska. 



4. F. Virginiaua, Ehrh. 1. c. 24. Smaller than the preceding ; the 

 (Jeep-green but rather dull subcoriaceous foliage pubescent on both 

 sides : fl. }4 ^^- broad : fr. as in the last. — Sierra Nevada in Tuolumne 

 Co., Chesitut & Dreir. 



17. RUBUS, Vergil. Shrubs or almost herbaceous undershrubs 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-lobed, without bractlets. 

 Petals (5) and stamens (co ) perigynous. Pistils 2 — ao , crowded on an 

 elevated receptacle, ripening into a coherent body of small drupes, so 

 forming the aggregate fruit called a raspberry or l^lackberry. 



* Fruil hemispherical or conical, concave beneath, parting freely from the 



receptacle (Raspberry). 

 •)— Unarmed ; leaves ample, palmately lobed. 



1. R. parviflorus, Nutt. Gen. i. 308 (1818) : R. Nutkanus, Mog. in 

 DC. Prodr. ii. 566 (1825). 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 



