Black Hickory

Black Hickory

Carya texana
Juglandaceae (walnuts)

A small to medium tree with short, crooked branches and a narrow crown.

Leaves alternate, feather-compound, 8–12 inches long. Leaflets usually 7, lance- to pear-shaped, 4–6 inches long, toothed; lower surface yellow-green with rusty hairs; leaf stalks with rusty hairs and tiny scales.

Bark dark gray to black, tight, not scaly, with irregular blocky ridges and deep furrows.

Twigs slender, often crooked, tapering abruptly to the terminal bud. Young twigs and terminal buds have fuzzy, rusty scales with tiny yellow dots.

Flowers April–May. Male and female flowers separate on the same tree. Male catkins in threes, 2–3 inches long; female flowers 1–2 with reddish hairs.

Fruits September–October, single or in small clusters. Nuts globe- or pear-shaped, 1¼–2 inches long, rather flattened; husk thin, brown, covered with yellow scales; kernel small, round, sweet, edible.

Distinguished from pignut hickory by 7 (not 5) leaflets, tapering twigs, and the yellow bud dots.

Height: to 80 feet.
Habitat and conservation: 
Black hickory is usually found in acid soils derived from chert, sandstone, or igneous rock in rocky or dry upland woods. It often grows where fertility is low and is usually considered an indicator of poor soil.
Distribution in Missouri: 
Widespread south of the Missouri River.
Human connections: 
The strong, hard wood is brittle and commonly used for fuel. The thick shell of the nut makes the kernel hard to extract, but hogs sometimes crack them, hence the other common name, "Ozark pignut hickory."
Ecosystem connections: 
Squirrels and mice eat the nuts, and squirrels also eat the buds. Hickory leaves are required food for many of our most beautiful and remarkable moths. The larva of the giant regal moth is called the hickory horned devil — not a very dignified name for the largest caterpillar on the continent!
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