ith a bloom; the stone rounded,
acute at one edge; flesh greenish, astringent. A low tree with thorny
branches; it is becoming naturalized along roadsides and waste places;
from Europe. Var. _instititia_ (Bullace Plum) is less thorny, and has
the leafstalk and lower side of the leaves pubescent.

[Illustration: P. domestica.]

6. =Prunus domestica=, L. (COMMON GARDEN PLUM.) Leaves 1 to 3 in. long,
oval or ovate-lanceolate, acute to obtuse. Flowers white, nearly
solitary. Drupe globular, obovoid to ovoid, of many colors (black,
white, etc.), covered with a rich glaucous bloom. A small tree, 10 to 20
ft. high, in cultivation everywhere for its fruit. Over a hundred
varieties are named in the catalogues.

[Illustration: P. Pennsylvanica.]

7. =Prunus Pennsylvanica=, L. f. (WILD RED CHERRY.) Leaves
oblong-lanceolate, pointed, finely and sharply serrate, shining green,
smooth on both sides. Flowers many in an umbel on long stems. Fruit
round, light red, quite small, 1/4 in. in diameter, sour. A small tree,
20 to 30 ft. high, in rocky woods; common north and extending southward
along the Alleghanies to North Carolina.

[Illustration: P. avium.]

8. =Prunus avium=, L. (BIRD-CHERRY OR ENGLISH CHERRY.) Leaves
oval-lanceolate, sharp-pointed, coarsely or doubly serrate. Flowers in
sessile umbels, opening when the leaves appear. Fruit of various colors,
somewhat heart-shaped. This is the Cherry tree, 30 to 50 ft. high, of
which there are many named varieties usually cultivated for the fruit.

[Illustration: P. Cerasus.]

9. =Prunus Cerasus=, L. (GARDEN RED CHERRY. MORELLO CHERRY.) Leaves
obovate and lance-ovate, serrate, on slender spreading branches. Flowers
rather large. Fruit globular, bright red to dark purple, very sour; in
sessile umbels. A small, round-headed tree, 10 to 30 ft. high, often
cultivated. The preceding species and this one are the parents of most
of the Cherry trees in cultivation.

[Illustration: P. serotina.]

10. =Prunus serotina=, Ehrh. (WILD BLACK CHERRY.) Leaves oblong or
lance-oblong, thickish, smooth, usually taper-pointed, serrate, with
incurved, short, thick teeth. Flowers in long racemes. June. Fruit as
large as peas, purple-black, bitter; ripe in autumn. A fine tree, 15 to
60 ft. high, with reddish-brown branches. Wood reddish and valuable for
cabinet-work. Common in woodlands and along fences.

[Illustration: P. Virginiana.]

11. =Prunus Virginiana=, L. (CHOKE-CHERRY.) Leaves thin, ov