JUGLANDACEAE 
Pignut Hickory 
Carya glabra (Mill.) Spach, [Hicoria glabra (Mill.) Britt.] 
[Carya porcina Nutt.] 
HABIT.—A tree usually 50-65 feet high, with a trunk diam- 
eter of 1-3 feet; forming a low, rather narrow, open crown of 
slender, often contorted branches. 
LEAVES.—Alternate, compound, 8-12 inches long. Leaflets 
usually 5-7, the upper 3-6 inches long, 2-2/4 inches broad; sub- 
sessile, except the terminal; oblong to obovate-lanceolate, taper- 
pointed; sharply serrate; thick and firm; glabrous, dark yellow- 
green above, paler beneath. Petioles long, slender, glabrous or 
pubescent. Foliage fragrant when crushed. 
FLOWERS.—May, after the leaves; monoecious; the stam- 
inate in pendulous, ternate catkins 3-7 inches long, slender, 
yellow-green, tomentose; scales 3-lobed, nearly glabrous; stamens 
4, with orange anthers; the pistillate in crowded, 2-5-flowered 
spikes, 4% inch long; calyx 4-toothed, hairy; corolia 0; stigmas 2, 
yellow. 
FRUIT.—October; variable in size and shape, 114-2 inches 
long, with thin husk splitting half-way and sometimes nearly 
to the base; nut obscurely 4-ridged, with thin or thick, hard shell 
and small,. sweet or slightly bitter kernel which is hard to 
remove. ; 
WINTER-BUDS.—Terminal bud ™%-% inch long, dome- 
shaped, greenish or grayish, smooth or finely downy. 
BARK.—Twigs greenish, nearly glabrous, becoming reddish, 
and finally grayish; thick, hard and grayish on the trunk, with a 
firm, close surface divided by small fissures and sometimes 
broken into plates. 
WOOD.—Heavy, hard, very strong, tough, close-grained, 
elastic, dark brown, with thick, whitish sapwood. 
DISTRIBUTION.—Occurs only in the extreme southern 
portion of the Lower Peninsula. Common within its range. 
HABITAT.—Prefers deep, rich loam, but grows in any 
well-drained soil; dry ridges and hillsides. 
NOTES.—Hardy and desirable for ornamental purposes. 
Difficult to transplant. Not adapted to street use. 
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