AMYGDALACEAE 
als 5, short. Petals 5, white or nearly so, broad. Stamens 13-20. 
647 
Pistil 
solitary. Ovary with 2 ovules. Drupe glabrous, often glaucous, with a fleshy 
exocarp and a bony stone.—About 100 pe most bis ndant 
temperate zone, tropieal Ameriea, and —Spr.— 
in the north 
UMS. CHERRIES.—The 
fruits of both wild and cultivated trees are Een Cad Sud as food, both raw 
and preserved. 
Drupe with a ventral groove: stone more or less flattened.— PLUM 
Perupe without a ventral groove: stone very turgid.— 
ERRIES. 
Flowers corym 
Flowers in rece like corymbs. 
I e S 
Flowers, and drupes, distinctly pedic 
I. a T 
II. ERE E 
III. CERAS 
d. 
Teeth of the leaf- = Pointed or acute, mostly not gland- -tipped when the 
leaves unfold: sepals glandless except sometimes for inconspicuous glands 
in P. ameri due 
Leaf-blades rather abruptly acuminate, rather coarsely and deeply serrate: 
TEA e ad mm. wide: drupes red or reddish-yellow, 18-30 mm. in 
Tree, pee rond ng from the roots, thus forming thickets: bark scaly on older 
trunks: leaf-blades glabrous or Sparingly pubescent, or rarely tomen- 
tose beneath, 2m minate, even when they idi fr uits ripening in 
A? P. 
July: stone ov 
Tree, not S TORRE. from the roots, thus not form- 
ing thickets: bark somewhat furrowed on older 
trunks: leaf-blades usually copiously tomentose 
beneath, commonly somewhat obtuse when the 
oe drupes ripening in October and Novem- 
stone obovoid to merely round. 
Leaf-blades gradually acuminate, or pe acute, 
ather finely serrate: corollas 6-14 mm. wide: 
rupes purple or d en to yellow, about 
15 mm. in diame 
Drupe globular: stone ubel ATT leaves glabrous. 
Drupe oval or ree ear stone somewhat elongate: 
eaves pubesce 
Twigs glabrous and shin 
Twigs closely mE 
Teeth 9: the leaves rounded or obtuse sometimes a 
pa 
glandular, except in P. angustifolia, in which the 
sepals are ciliate. 
Leaf-blades rather thick, ovate to ovate-lanceolate, 
and irregularly serrate. 
coa mol rather m oblong-lanceolate to 
oe lustro above, not ae cuously veiny 
pier ay ae 6-10. cm. DE “sepals ian duiae. 
Leaf-blades usually 2-6 long: sepals non- 
glandular. 
Flowers, and drupes, short-pedicelled or nearly sessile. 
PENNSYLVANIC 
II 
Small tree with reddish-brown pM S, acuminata leaf- 
blades, and small red fruits 5-7 m eter 
III. CER 
Low shrubs: corolla about 1 cm. broad: leat bladés appressed- 
serrate: drupes mostly less than 1 n diameter. 
Large trees: corolla 1.5-3 cm. broad: leaf-blades sharply 
serra drupes mostly over 10 mm. in diameter 
Drupe sour: leaves glabrous. 
Drupe sweet: leaves pubescent. 
americana. 
2. P. mexicana. 
3. P. umbellata. 
4. P. mitis 
5. P. inm undo: 
6. P. hortulana. 
7. P. Munsoniana. 
F P. angustifolia. 
. P. geniculata. 
10. P. pennsylvanica. 
11. P. cuneata. 
12. P. Cerasus. 
13. P. Avium. 
