The World Flora Online

Trees to 65 m tall; trunk to 1.8 m d.b.h.; bark gray-brown, deeply furrowed, with irregularly oblong, long, scaly plates; crown conical, becoming rounded or flattened on top; winter buds light red-brown, ovoid-cylindric, slightly resinous. Needles 5 per bundle, not pendulous, deep green to blue-green, slightly twisted, 6-14 cm × 0.7-1 mm, pliant, stomatal lines present on all surfaces, base with early shed sheath 1-1.5 cm, margin finely serrulate. Seed cones clustered, pedunculate (peduncle 2-3 cm), gray-brown or pale brown with purple or gray tints, cylindric, ellipsoid, or lanceolate-cylindric when open, 7-20 cm, maturing in 2 years, then soon shedding seeds and falling. Apophyses slightly raised, apex resinous; umbo terminal. Seeds red-brown, black mottled, broadly and obliquely obovoid, compressed, 5-6 mm; wing pale brown, 1.8-2.5 cm.

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• 1
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Trees to 67m; trunk to 1.8m diam., straight; crown conic, becoming rounded to flattened. Bark gray-brown, deeply furrowed, with long, irregularly rectangular, scaly plates. Branches whorled, spreading-upswept; twigs slender, pale red-brown, glabrous or pale puberulent, aging gray, ±smooth. Buds ovoid-cylindric, light red-brown, 0.4--0.5cm, slightly resinous. Leaves 5 per fascicle, spreading to ascending, persisting 2--3 years, 6--10cm ´ 0.7--1mm, straight, slightly twisted, pliant, deep green to blue-green, pale stomatal lines evident only on adaxial surfaces, margins finely serrulate, apex abruptly acute to short-acuminate; sheath 1--1.5cm, shed early. Pollen cones ellipsoid, 10--15mm, yellow. Seed cones maturing in 2 years, shedding seeds and falling soon thereafter, clustered, pendent, symmetric, cylindric to lance-cylindric or ellipsoid-cylindric before opening, ellipsoid-cylindric to cylindric or lance-cylindric when open, (7--)8--20cm, gray-brown to pale brown, with purple or gray tints, stalks 2--3cm; apophyses slightly raised, resinous at tip; umbo terminal, low. Seeds compressed, broadly obliquely obovoid; body 5--6mm, red-brown mottled with black; wing 1.8--2.5cm, pale brown. 2 n =24.

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• 2
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Tall tree, to 70 m, with long, irregular branches; bark becoming thick, dark, and furrowed; wood pale, soft, not very resinous; lvs very slender, in 5’s, mostly persisting 2 years, pale green and glaucous, 8–13 cm, with 1 fibrovascular bundle; bundle-sheath deciduous; cones commonly borne near the tips of the longer branches, cylindric, often bent, 10–15 cm, the apophysis not thickened, the umbo resinous and terminal, unarmed; seed (wing included) 2–3 cm. Many habitats, esp. in fertile or well drained, sandy soil; Nf. to Minn. and se. Man., s. to Del., n. Ga., Ky., and Io.

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• 7
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Bis 60 m hoher Nadelbaum mit grauer bis dunkelbrauner Rinde. Nadeln in Büscheln zu 5, zart, grün, 8–15 cm lang. Reife Zapfen 10–15 cm lang, gekrümmt, hängend, schon am Baum sich öffnend. Samen geflügelt.

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• 6
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5. Wälder, nur angepflanzt, kollin(-montan). CH.

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• 6
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