Difference between revisions of "Pinus echinata"
Gard. Dict., ed. 8 Pinus no. 12. 1768.
Common names: Shortleaf pine
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>to 40m; trunk to 1.2m diam., straight; crown rounded to conic. <b>Bark</b> red-brown, scaly-plated, plates with evident resin pockets. <b>Branches</b> spreading-ascending; 2-year-old branchlets slender (ca. 5mm or less), greenish brown to red-brown, often glaucous, aging red-brown to gray, roughened and cracking below leafy portion. <b>Buds</b> ovoid to cylindric, red-brown, 0.5–0.7(–1)cm, resinous. <b>Leaves</b> 2(–3) per fascicle, spreading-ascending, persistent 3–5 years, (5–)7–11(–13)cm × ca. 1mm, straight, slightly twisted, gray- to yellow-green, all surfaces with fine stomatal lines, margins finely serrulate, apex abruptly acute; sheath 0.5–1(–1.5)cm, base persistent. <b>Pollen</b> cones cylindric, 15–20mm, yellow- to pale purple-green. <b>Seed</b> cones maturing in 2 years, semipersistent, solitary or clustered, spreading, symmetric, lanceoloid or narrowly ovoid before opening, ovoid-conic when open, 4–6(–7)cm, red-brown, aging gray, nearly sessile or on stalks to 1cm, scales lacking contrasting dark border on adaxial surfaces distally; umbo central, with elongate to short, stout, sharp prickle. <b>Seeds</b> ellipsoid; body ca. 6mm, gray to nearly black; wing 12–16mm. <b>2n</b> =24.</span><!-- |
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|genus=Pinus | |genus=Pinus | ||
|species=Pinus echinata | |species=Pinus echinata | ||
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Revision as of 13:25, 27 July 2019
Trees to 40m; trunk to 1.2m diam., straight; crown rounded to conic. Bark red-brown, scaly-plated, plates with evident resin pockets. Branches spreading-ascending; 2-year-old branchlets slender (ca. 5mm or less), greenish brown to red-brown, often glaucous, aging red-brown to gray, roughened and cracking below leafy portion. Buds ovoid to cylindric, red-brown, 0.5–0.7(–1)cm, resinous. Leaves 2(–3) per fascicle, spreading-ascending, persistent 3–5 years, (5–)7–11(–13)cm × ca. 1mm, straight, slightly twisted, gray- to yellow-green, all surfaces with fine stomatal lines, margins finely serrulate, apex abruptly acute; sheath 0.5–1(–1.5)cm, base persistent. Pollen cones cylindric, 15–20mm, yellow- to pale purple-green. Seed cones maturing in 2 years, semipersistent, solitary or clustered, spreading, symmetric, lanceoloid or narrowly ovoid before opening, ovoid-conic when open, 4–6(–7)cm, red-brown, aging gray, nearly sessile or on stalks to 1cm, scales lacking contrasting dark border on adaxial surfaces distally; umbo central, with elongate to short, stout, sharp prickle. Seeds ellipsoid; body ca. 6mm, gray to nearly black; wing 12–16mm. 2n =24.
Habitat: Uplands, dry forests
Elevation: 200–610m
Distribution
Ala., Ark., Del., Fla., Ga., Ill., Ky., La., Md., Miss., Mo., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va.
Discussion
Although Pinus echinata is highly valued for timber and pulpwood, it is afflicted by root rot. It hybridizes with P. taeda, the pine most commonly associated with it.
Selected References
None.
Lower Taxa
None.