Amvgdalaceae 223 
A. Fruit black; spines 1—3 cm. long. 
B. Leaves lobed or incisely and doubly toothed; petiole with scattered glands. W. 
E. (C. brevispina.) C. douglasii Lindl. 
BB. Leaves serrate, not incisely toothed or lobed; petiole glandless. E. 
C. rivularis Nutt. 
AA. Fruit red; spines 4—6 cm. long. 
C. Leaves oval to orbicular. E. 
C. sheridana Nels. 
CC. Leaves cuneate-obovate. 
D.  Calfyx and fruit glabrous. E. 
C. columbiana How. 
DD. Calyx and fruit tomentose. E. 
C. piperi Brit. 
AMYGDALACEAE (Drupaceae) Peach Family 
Shrubs or trees. Leaves alternate, simple, petioled; stipules small and caducous or 
none. Flowers regular, perfect or dioicous or polygamous. Calyx tubular or campanu- 
late, deciduous; segments 5. Petals 5, on the calyx. Stamens 15—-20, on the calyx. 
Pistils |—5, distinct; style simple; ovary superior, |-celled, 2-ovuled. Fruit 1—5 sep- 
arate drupes, edible or not. Seed 1, bitter. 
A. Leaves mostly serrate; stipules present but caducous: flowers perfect, not with bad 
odor; carpels 1; fruit | drupe. PRUNus (p. 223) 
AA. Leaves entire or undulate; stipules none; flowers dioicous, with bad odor; carpels 
2—5; fruit 2—5 drupes. OSMARONIA (p. 223) 
PRUNUS PLUM, CHERRY 
Shurbs or trees. Leaves serrate or undulate or entire. Flowers white or pink, in 
umbels or corymbs or racemes. Petals spreading. Style terminal. Fruit glabrous, with 
or without bloom, edible, or not; stone smooth or nearly so, globose or oval, or oblong 
and flat. (Latin name of the plum.) 
A. Fruit 15—20 mm. long; stone flattened ; leaves convolute in the bud; flowers not 
in racemes. W.E. (P. oregana.) 
P, subcordata Benth. (Plum) 
. AA. Fruit 4—10 mm. long; stone subglobose; leaves conduplicate in the bud. 
B. Flowers in corymbs; fruit bright red; petiole without glands. W.C. E. (P. 
emarginata villosa; P. mollis.) 
P. emarginata Walp. (Wild Cherry) 
BB. Flowers in racemes; fruit dark purple; petiole usually with 2 glands just below 
point of attachment to blade. W.E. (P. melanocarpa.) 
FP. demissa Dietr. (Choke-cherry) 
OSMARONIA INDIAN PLUM 
Shrub. Leaves deciduous, entire or undulate; stipules none. Flowers polygamous 
or dioicous, in racemes; racemes loose, nodding, bracted, appearing with the leaves and 
from the same buds. Stamens 15, those of the fertile flowers all with abortive anthers. 
Carpels 5, distinct; styles lateral, jointed at base; ovules 2 in each carpel. Fruits 2—5, 
l-seeded, blue-black with a bloom; pulp thin, not edible; stone smooth, somewhat flat. 
(Gk. osmeres—smelling; the flowers have an unpleasant odor.) W. C. 
0. cerasiformis GT. 

