(246) 



1. Prunus L. Plum. Oherey. 

 Drupe fleshy; endocarp not rugose. — ^ . 



1. EMAEGINATA Wa 1 J) e r s . Flowers in a 

 corymb; petals white.— Tamalpais. Spring. 



Black, cherry-like fruit. Not poisonous, 

 although not edible. 



2. P. DEMissA Walpers. Flowers in termi- 

 nal racemes; petals white. — Mills Seminary. 

 Marin County. Spring. 



Dark red or purplish cherry. Edible. 

 * 'Choke-cherry." 



3. P. ILICIFOLIA Walpers, Flowers in leaf- 

 less racemes from the axils of evergreen leaves; 

 petals white. — Common. Spring. "Holly- 

 leaf Cherry." 



Ked or purplish cherry, not of bad taste, but 

 suspicious. The leaves at times prove poison- 

 ous to sheep and cattle, probably only when 

 by their withering hydrocyanic acid is devel- 

 oped, the smell of it in the withering leaves 

 becomes very percej)tible. 



2. Nuttallia Ton-. & Gray. 



Flowers polygamous. Ovaries 5. Fruit sev- 

 eral 1-seeded drupes. Flowers white. — ^ . 



1. N. CERASiFORMis Torr. & Gray. Flowers 

 white. — Common. Spring. 



Drupes blue, of agreeable but slightly bitter 

 taste, but suspicious. 



