54 POMACES. 



Photinia. Usually 10 — 25 ft. high ; nascent parts tomentulose : leaves 

 dark green and shining, narrowly oblong to oblong-lanceolate, acute at 

 both ends, sharply but not very closely serrate or dentate, 2—4 in. long : 

 pome 3 lines long : seed one-half as long. — Very common along streams 

 and on northward slopes, in the Coast Range. Fl. July, fr. Dec. 



4. SORBITS, Theophraslus (Mountain Ash). Unarmed deciduous 

 shrubs or small trees with few and coarse branchlets and large winter 

 buds. Leaves large, unequally pinnate, the leaflets serrate. Flowers 

 numerous, small, white, in terminal compound cymes. Stamens 20. 

 Styles distinct and as many as the cells of the ovary (3— .">). Pome very 

 small, globose or pyriform, the coriaceous cells (2-ovuled in the ovary) 

 1-seeded by abortion. Seeds brownish ; testa rather thin. 



1. S. occideutalis, Greene. Wats. Proc. Am. Acad, xxiii. 264 (1888), 

 under Pi/rus: P. samhucifolia, B. & W. Bot. Calif. 189, not of Cham. & 

 Schl. Bushy and only 2—6 ft. high, glabrous -: leaflets 3-5 pairs, oblong 

 or elliptical, obtuse, serrate only from about the middle, 1—2 in. long : 

 cyme small, few-flowered : calyx glabrous : pome somewhat pyriform, 

 coral-red.— In the Sierra from near the Yosemite northward. 



5. MALUS, Tourneforl (Apple-Tree. Crab- Apple). Small deciduous 

 trees with more slender branchlets and small winter buds. Leaves 

 simple, more or less serrate. Flowers rather large, reddish or white, 

 corymbose at the ends of short lateral branchlets. Stamens 20. Styles 5, 

 more or less united at base. Carpels 5, wholly covered by the adnate 

 calyx-tube, ohartaceous in fruit, 2-seeded. Pome large, globose, depressed 

 at each end, the flesh of acidulous rather than saccharine taste and 

 destitute of grit-cells. 



1. M. rivularis, M. J. Roemer, Syn. Monog. iii. 215 (1847) ; Dougl. in 

 Hook. Fl. i. 203. t. 68 (1833) under Pyrm. Tree 15—25 ft. high : leaves 

 ovate-lanceolate, acute or acuminate, 1—3 in. long, often slightly 3-lobed, 

 sharply serrulate, more or less pubescent when young : corymb somewhat 

 racemose ; pedicels slender, 1 in. long : petals orbicular, 3 — 4 lines 

 broad, white : pome red or yellow, short-cylindrical, ^g in. long or 

 more. — The Oregon Crab-apple has been found as far southward in the 

 State as Sonoma Co., Bigelow, and may perhaps be expected in Marin. 



2. M. COMMUNIS, DC, the common apple of the orchards already of 

 frequent occurrence by waysides, is destined to become naturalized in 

 California, as in many parts of the world where it has been long cultivated. 



6. PERAPHYLLUM, Nu'tall. Shrub low, diffuse, unarmed, with 

 rigid, lanceolate, deciduous leaves, and the inflorescence, flowers and 

 fruits of Mains, save that the cells of the carpels are divided each into 

 two 1-seeded apartments by an incomplete partition. 



