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1. Prunus L. Ptium. CHeErry. 
Drupe fleshy; endocarp not rugose.— R. 
1. emarcinata Walpers. Flowers in a 
corymb; petals white.—Tamalpais. Spring. 
Black, cherry-like fruit. Not poisonous, 
although not edible. 
2. P. pEmissa Walpers. Flowers in termi- 
nal racemes; petals white.—Mills Seminary. 
Marin County. Spring. 
Dark red or purplish cherry. Edible. 
‘‘Choke-cherry.” 
3. P. itcrrotia Walpers, Flowers in leaf- 
less racemes from the axils of evergreen leaves; 
petals white. — Common. Spring. ‘‘Holly- 
leaf Cherry.” 
Red 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 perceptible. 
" 2, Nuttallia Torr. & Gray. 
Flowers polygamous. Ovaries 5. Fruit sev- 
eral 1-seeded drupes. Flowers white.— b. 
1. N. cerasirormis Torr. & Gray. Flowers 
white.—Common. Spring. 
Drupes blue, of agreeable but slightly bitter 
taste, but suspicious. 
