POMACEiE. 53 



3. A. pallida. Stems clustered and bushy, 8 5 ft. hish, rigid and 

 with an ashy bark : leaves even at flowering time almost coriaceous, 

 pale green, '^4 in. long, from oblanceolate and obovate to oblong, obtuse 

 or retuse at apex, cuspidate, entire or sparingly serrate-toothed at apex : 

 racemes 00 - flowered, but short and somewhat corymbose, the lower pedi- 

 cels elongated : calyx more or less tomentose ; teeth triangular, acute, 

 erect : petals obovate or obovate-oblong, slightly concave, 3 — 5 lines 

 long.- A most distinct species, as well marked in floral character as in 

 its very pale glaucous-looking coriaceous foliage. Common on dry hills 

 of the northern and northeastern parts of the State ; perhaps not within 

 our limits. Fl. May, fr. July. 



2. CRATAEGUS, Toumefort (Thorn). Thorny shrubs or small trees, 

 with simple toothed or lobed leaves and corymbose heavy-scented white 

 flowers. O.xlyx-tube urceolate ; the limb 5-lobed. Petals rounded, con- 

 cave. Stamens 5—20. Styles 2^5. Pome more or less berry-like, red 

 or purple, crowned with the calyx-teeth and containing 2—5 bony 1- 

 seeded carpels. 



1. C. rivularis, Nutt. in T. & G. Fl. i. 464 (1840). Tree 10 15 ft. high, 

 nearly or quite glabrous : thorns short, stout : leaves oblong-ovate or 

 ovate, obtuse or acute, cuneate at base, incisely serrate, occasionally 

 somewhat lobed, 1—2 in. long: corymbs small; fl. 4—5 lines broad: 

 calyx-lobes short, obtuse, often pubescent on the margin : pome small. — 

 Sierra and Plumas counties, and far to the northward and eastward. 



2. C. Douglasii, Liudl. Bot. Reg. t. 1810 (1835). Tree 10 25 ft. high, 

 leaves and young shoots villous-pubescent : thorns 1 in. long : leaves 

 11-2—3 in., broadly ovate, more or less incisely cleft or lobed and finely 

 serrate : corymb many-flowered : fl. 5 — 8 lines broad ; calyx-teeth lance- 

 olate, nearly as long as the tube, pubescent : fruit dark red or purple, 

 sweetish but rather insipid. In the northern counties ; perhaps not 

 within our limits. 



3. HETEROMELES, J/. ./. Rienwr ( Tollon. California Holly. 

 Christmas Berry). A. small evergreen tree with simple coriaceous 

 serrate leaves, and numerous small white flowers in terminal corymbose 

 panicles. Calyx turbinate ; limb 5-parted, the lobes at length inflexed 

 over the carpels and becoming fleshy. Petals 5, rounded, concave. 

 Stamens 10 ; filaments dilated at base and slightly connate. Ovary 2—3- 

 celled, 4—6 ovuled ; styles and stigmas 2—3. Fruit ovoid, red, berry- 

 like with dry mealy pulp of acid and astringent taste ; carpels free from 

 the fleshy calyx-tube above the middle. Seeds 1—2 in each cell, erect ; 

 testa thin-cartilaginous. 



1. H. arl)utifolia. M. J. Roemer, Syn. Monog. iii. 105 (1847) ; Ait. f. 

 Kew. iii. 202 (1811), under Craliegus ; Lindl. Bot. Reg. t. 491 (1820), under 



