Forest Trees of Texas: How to Know ThemMattoon, Wilbur R. (Wilbur Reed)
Science
Forest Trees of Texas: How to Know Them
Mattoon, Wilbur R. (Wilbur Reed)
Trees -- Identification; Trees -- Texas
The LEAVES are compound, 5 to 8 inches long, with 7 to 17 ovate,
toothed, bright green leaflets.
The small, pale green FLOWERS, borne in loose, wide-branched cymes, 4 to
5 inches long and 2 to 3 inches wide, bloom in early spring when the
leaves are almost half grown. The small FRUIT, a one-seeded carpel,
ripens in early summer. The seeds hang outside the carpels and are eaten
by birds.
The soft, light brown WOOD has no special known value.
A variety, fruiticosum (A. Gray) S. Wats., is a shrubby form found in
West Texas. It has short, often 3-foliate, pubescent leaves and blunt,
leathery leaflets.
COMMON HOPTREE (Wafer-Ash)
Ptelea trifoliata L.
This small tree or large shrub is found scattered over the eastern
portion of the state. The bark and leaves are bitter and strong-scented
and possess tonic qualities.
The hoptree has a straight, slender trunk 6 to 8 inches in diameter and
seldom reaches a height of more than 20 feet.
[Illustration: COMMON HOPTREE (Fruit, three-fourths natural size; leaf,
one-third natural size)]
The LEAVES are composed of 3 leaflets, sometimes 5, each of which is
oval or pear-shaped and pointed, about 4 to 6 inches long and 2 to 3
inches wide, and dark green on the upper surface. The central leaflet is
the largest.
The FRUIT consists of a small, round, 2-seeded, winged “key” or
“samara”, resembling somewhat the familiar paper caps for toy pistols.
The seeds occur in dense drooping clusters and hang on the tree over
winter.
The WOOD is heavy, hard, yellowish-brown, and close-grained. The shrub
is often planted as an ornamental.
SHINING SUMAC (Dwarf or Flameleaf Sumac)
Rhus copallina L.
Shining sumac is found growing naturally west to the San Antonio River.
It is more commonly a shrub than a tree and grows in clumps and thickets
around the edges of the fields and in other open places. The leaves turn
crimson in the fall and add a vivid note to the autumn coloring. The
tree spreads by means of shallow root-runners.
The BARK is almost smooth, with horizontal splashes of light and dark
gray, and many small excrescences. This papery outer bark cracks at
irregular intervals, exposing spots of reddish-brown beneath.
[Illustration: SHINING SUMAC (Leaf and fruit one-half natural size)]
The compound LEAVES are alternate, 6 to 8 inches long, with 9 to 21
small ovate-lanceolate leaflets, glossy green above, downy beneath. This
sumac is easily distinguished from others by the fact that the leaf
rachis is winged. The leaves are rich in tannin, and are used in large
quantities for curing leather, and for the manufacture of dyes.
The tiny, pale green FLOWERS are borne in compact conical, panicles in
July. Male and female flowers are borne on separate trees. The small
FRUIT is red, covered with short hairs, and has an acid taste. The
fruits cling, and are eaten by birds in late winter.
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