PEACH FAMILY 



467 



cent, entire or rarely obscurely serrulate ; flowers 1-3 on the short stubby branchlets, subsessile ; 

 hypanthium 2 mm. long; petals oblanceolate, about 3 mm. long; drupe ovoid, 8-10 mm. long, 

 densely pubescent ; stone smooth, narrowly winged on the ventral side. 



Desert slopes, Sonoran Zones; Mojave and Colorado Deserts from Inyo County to Imperial County, Cali- 

 fornia, east to southern Utah and western Arizona. Type locality: "Sierra Nevada, California." March-May. 



Prunus fasciculata var. punctata Tepson, Fl. Calif. 2: 230. 1936. Young branches densely pubescent. 

 Leaves glandular-punctate, otherwise glabrous. Sandy flats near Bicknell station, northern Santa Barbara 

 County (type locality), also western San Luis Obispo County, California. 



6. Prunus demissa (Nutt.) Walp. Western Choke Cherry. Fig. 2525. 



Cerasus demissa Nutt. in Torr. & Gray, Fl. N. Amer. 1: 411. 1840. 



Prunus demissa Walp. Rep. 2: 10. 1843. 



Padus demissa M. Roem. Fam. Nat. Syn. 3: 87. 1847. 



Erect shrub, 1-5 m. high, with gray-brown bark becoming slightly fissured on old trunks, 

 young twigs usually rather densely hairy, becoming smooth and gray-brown. Leaves oblong- 

 ovate, 3-8 cm. long, acute or abruptly short-pointed at apex, more or less pubescent beneath ; 

 petioles about 1 cm. long, with 1 or 2 glands near the base of the blade ; racemes 5-10 cm. long, 

 terminating more or less leafy branchlets ; sepals short, obtuse ; petals orbicular, 5-6 mm. broad ; 

 drupe globose, 5-6 mm. broad, red or dark purple, sweet and edible, but astringent ; stone glo- 

 bose, smooth. 



Ravines and wooded slopes, Upper Sonoran and Transition Zones; Washington and Idaho south to southern 

 California. Type locality: "Plains of the Oregon [Columbia] towards the sea, and at the mouth of the Wahla- 

 met [Willamette]." 



Prunus demissa subsp. melanocarpa A. Nels. Mitt. Deuts. Dendr. Ges. 1911: 231. 1911. Distinguished 

 from the typical species by the glabrous bright green leaves, glandless petioles, glabrous twigs and black fruit. 

 The common choke cherry of the Rocky Mountains and Great Basin, extending into eastern Oregon and the 

 eastern slopes of the Sierra Nevada, California. 



7. Prunus ilicifolia (Nutt.) Walp. Holly-leaved Cherry. Fig. 2526. 



Cerasus ilicifolia Nutt. ex Hook. & Arn. Bot. Beechey 340. 1832. 



Prunus ilicifolia Walp. Rep. 2: 10. 1843. 



Laurocerasus ilicifolia M. Roem. Fam. Nat. Syn. 3: 92. 1847. 



Arborescent shrub or small tree, 2-9 m. high with a round-topped crown and a trunk up to 

 3-4 dm. in diameter, bark dark gray-brown and becoming fissured, young twigs red-brown, gla- 

 brous. Leaves evergreen, coriaceous, ovate to suborbicular, 2-6 cm. long, spinose-toothed ; petioles 

 8-12 mm. long ; racemes 2-6 cm. long ; petals broadly obovate, 2-3 mm. long ; drupe ovoid-ellipsoid, 

 12-18 mm. long, dark purple, with a thin fleshy exocarp; stone smooth, slightly obcompressed, 

 apiculate. 



Wooded slopes, Upper Sonoran and Transition Zones; Coast Ranges from Napa County, California, to 

 northern Lower California. Type locality: Santa Barbara, California. April- May. 



8. Prunus Lyonii (Eastw.) Sarg. Catalina Cherry. Fig. 2527. 



Prunus occidentalis Nutt. ex Lyon, Bot. Gaz. 11: 202. 333. 1886. Not Sw. 

 Prunus integrifolia Sarg. Man. Trees N. Amer. 531. /. 441. 1905. Not Walp. 

 Cerasus Lyonii Eastw. Occ. Papers Calif. Acad. 9: 54. 1905. 

 Laurocerasus Lyonii Britt. in Britt. & Shafer, N. Amer. Trees 512. 1908. 

 Prunus Lyonii Sarg. PI. Wilson. 74. 1911. 



Trees, 5-15 m. high, bark dark gray-brown becoming fissured. Leaves evergreen, coriaceous, 

 oblong-ovate to lanceolate-ovate, acute to acuminate, 3-8 cm. long, commonly entire but some- 



2518 



2519 



2520 



2518. Rosa gymnocarpa 



2519. Rosa Bridgesii 



2520. Prunus emarginata 



