PRUNUS SEROTINA Ehrhart. Wild Black Cherry. (× 1/2.)]

=6. Prunus serótina= Ehrhart. Wild Cherry. Cherry. =Wild Black Cherry.=

Plate 104. Medium to large sized trees; bark of young trees smooth,

becoming on old trees irregularly fissured and separating in small scaly

plates; twigs slender and smooth, sometimes pubescent while young;

leaves oval, oblong-oval, ovate or narrowly ovate, generally 5-12 cm.

long and 2-4 cm. wide, generally narrowed at the base, sometimes

rounded, short or long acuminate at the apex, margin finely serrate with

incurved sharp callous teeth, smooth above and below, sometimes slightly

pubescent beneath while young; flowers appear in May, when the leaves

are almost grown, on the ends of the year's growth, in racemes generally

5-10 cm. long; fruit ripens in July and August, globose, about 6-10 mm.

in diameter, dark red to almost black.

=Distribution.=--Nova Scotia to South Dakota, south to Florida and west

to Texas. Found in all parts of Indiana. It prefers a moist loose soil

and is usually found with beech, sugar maple, tulip, white ash and white

oak. In the original forest it was a rare to a frequent tree, and only

rarely and locally did it ever become common. It grew to be several feet

in diameter and was as tall as the highest trees of the forest. The

trunk of the tree, however, was inclined to be crooked. It has now

become a frequent tree along fences.

=Remarks.=--The wood of wild cherry from pioneer times has been a

favorite wood, and for this reason the tree soon disappeared and today

large trees are very rare. The wood is strong, close-grained,

reddish-brown, and very much resembles mahogany. In value it stands

second in Indiana woods. It is used principally for furniture, office

and store fixtures.

The wild cherry grows readily from seed; is not difficult to transplant;

adapts itself to almost all kinds of soils and grows rapidly. In Spring

it is one of the very first trees to put out its leaves. It is not shade

enduring, which no doubt, in a great measure, accounts for its rarity in

the primeval forests. When grown in the open the tree usually produces

an abundance of fruit which is much relished by birds. This species has

many good features, and might be used to advantage in forest planting.

=CAESALPINÀCEAE.= The Senna Family.

Leaves simple; flowers pink; seed pod papery 1 Cercis.

Leaves compound; flowers not pink; seed pod woody or

leathery.

Trees with thorns; stamens 3-5, longer than the corolla;

pods flat and leathery; seeds about 1 cm.

(1/2 inch) long 2 Gleditsia.

Trees without thorns; stamens 10, shorter than the

corolla; pods swollen, woody; seeds about 2 cm.

(1 inch) long 3 Gymnocladus.

=1. CÉRCIS.= The Redbud.

=Cercis canadénsis= Linnæus. Redbud. Plate 105. Small trees; bark of

trunk of old trees fissured, reddish-brown; twigs glabrous, light brown,

becoming a dark brown; leaves alternate, broadly ovate, average blades

6-14 cm. long, cordate at base, short-pointed, sometimes short-acuminate

or rarely rounded at the apex, margins entire, glabrous or pubescent on

unfolding, at maturity usually glabrous on both sides, or with a few

hairs in the axils of the veins or along the veins, sometimes more or

less pubescent beneath, and with hairs on the veins above; petioles

generally 2-6 cm. long; flowers appear in April or May before the

leaves, in clusters of 4-8 on the branches of the preceding season, pink

or rose color; pods 5-10 cm. long, thin, flat and glabrous; wood heavy,

hard and weak.

=Distribution.=--In Canada along the shores of Lake Erie and Ontario,

New York west through Michigan to Iowa, south to the Gulf States and

west to Texas. Found throughout Indiana except there are no records from

the counties bordering Lake Michigan. In the northern part of the State

it is rare or frequent in alluvial soil along streams or in rich woods.

In the southern part of the State it is a frequent to a common tree in

ravines and on slopes. It is never found in wet situations, and

consequently is absent in the "flats" of the southern counties.

=Remarks.=--The redbud is the common name for this tree throughout the

State. In one locality it was known as the fish blossom because the

larger fish spawn when this tree is in flower. In text books it is also

called Judas tree. It is usually a tree 1-1.5 dm. in diameter and 5-10

m. high. It is of no economic importance and is classed as a weed tree

in the woodlot and should be removed.

It is frequently recommended for ornamental planting. It prefers a rich

moist soil, and is shade enduring, although it succeeds best in the open

or in a light shade.

=2. GLEDÍTSIA.= The Honey Locust.

Pods more than 8 cm. long; seeds oval 1 G. triacanthos.

Pods less than 8 cm. long; seeds orbicular 2 G. aquatica.

=1. Gleditsia triacánthos= Linnæus. Honey Locust. Plate 106. Medium to

large sized trees; bark of old trunks fissured and peeling off in

strips; spines on trunk large and often much branched, sometimes 4 dm.

long; spines on branches not so large, generally more or less forked;

twigs at first green, turning a light brown; leaves pinnate or

bipinnate, 1-2 dm. long, rachis permanently pubescent; leaflets 9-14

pairs, fewer on the bipinnate forms, petiolules about 1 mm. long, form

variable from ovate to lanceolate, sometimes somewhat falcate, generally

2-3 cm. long, usually more or less pubescent beneath; flowers appear in

May or June, inconspicuous, greenish-yellow, rich in honey, their

appearance being announced by the hum of the swarm of insects visiting

them; fruit a flat, linear twisted pod, 2-4 dm. long, glabrous and

lustrous or pubescent on the sides; seeds several, oval, about 6 mm.

wide, and 10 mm. long, glabrous and chestnut brown; wood heavy, hard,

strong, coarse-grained and takes a good polish.

[Illustration: Plate 105.

Trees of Indiana First Revised Edition (Publication No. 13, Department of Conservation, State of Indiana) · 第 156 / 265 题