ROSACEvE 



553 



erect and spreading branches forming a narrow round-topped head, and slender branchlets 

 green and sparingly villose when they first appear, soon becoming glabrous, and in their 

 second year chestnut-brown and lustrous and marked by minute pale lenticels. Bark 

 about \' thick, dark reddish brown, fissured and divided into small closely appressed scales. 

 Distribution. Hillsides, Descanso Canon, about a mile and a half up the coast west of 

 Avalon, Santa Catalina Island, and on Santa Cruz Island, California. 



3. Cercocarpus betuloides Nutt. 

 Cercocarpus parvifolius var. betuloides Sarg. 



Leaves obovate to oval, acute or rounded at apex, cuneate at base, finely serrate above 

 the middle with straight or incurved glandular teeth, dark green on the upper surface, pale 

 and villose-pubescent or tomentose sometimes becoming nearly glabrous on the lower 



Fig. 509 



surface, l'-l|' long, and %'-%' wide, with a thin midrib, and 5-8 pairs of slender primary 

 veins more or less deeply impressed on the upper side of the leaf; petioles densely villose, 

 often becoming glabrous, about ' in length; stipules scarious, acuminate. Flowers nearly 

 sessile, in 1-3-flowered clusters; calyx-tube densely villose, about f long, the limb turbi- 

 nate, villose on the outer surface, glabrous on the inner surface, \' wide. Fruit on slen- 

 der slightly villose pedicels '-$' in length; mature calyx-tube often slightly gibbous, 

 deeply cleft at apex, light chestnut-brown, sparingly villose, T V m diameter; akene covered 

 with stiff spreading hairs; sfyle 2'-S' in length. 



A tree, occasionally 25 high, with a single trunk, small ascending and spreading branches 

 forming an open irregular head, and slender red-brown branchlets covered when they first 

 appear with loose pubescence, soon becoming glabrous; more often a tall or low shrub with 

 several stems. Bark smooth, separating intp thin deciduous scales. 



Distribution. Common and widely distributed over the California coast ranges from 

 Siskiyou County to the Santa Monica and San Bernardino Mountains. 



4. Cercocarpus ledifolius Nutt. 



Leaves narrow-lanceolate, lance-elliptic or oblanceolate, acute at the ends, apiculate, 

 entire with thick revolute margins, coriaceous, reticulate-veined, puberulous while young, 

 and at maturity dark green, lustrous and glabrous on the upper surface and pale or rufous 

 and tomentulose on the lower surface, resinous, '-!' long, and '-f wide, with a broad 



