Difference between revisions of "Pinus aristata"
in Parry & Engelmann,Amer. J. Sci. Arts ser. 2, 34: 331. 1862.
Common names: Colorado bristlecone pine
Synonyms: Pinus balfouriana var. aristata (Engelmann) Engelmann
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 15m; trunk to 1m diam., strongly tapering, twisted; crown rounded, flattened (sheared), or irregular. <b>Bark</b> gray to red-brown, shallowly fissured, with long, flat, irregular ridges. <b>Branches</b> contorted; twigs pale red-brown, aging gray, puberulent, young branches resembling long bottlebrushes because of persistent leaves. <b>Buds</b> ovoid-acuminate, pale red-brown, ca. 1cm, resinous. <b>Leaves</b> 5 per fascicle, upcurved, persisting 10–17 years, (2–)3–4cm × 0.8–1mm, mostly connivent, deep blue-green, with drops and scales of resin, abaxial surface with strong, narrow median groove, adaxial surfaces conspicuously whitened by stomates, margins entire or distantly serrulate, apex conic-acute to conic-subulate; sheath 0.5–1.5cm, scales soon recurving, shed early. <b>Pollen</b> cones ellipsoid, ca. 10mm, bluish to red. <b>Seed</b> cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, lance-cylindric before opening, lance-ovoid to ovoid or cylindric when open, 6–11cm, purple to brown, nearly sessile; apophyses much thickened; umbo central, with triangular base, extended into slender, brittle prickle 4–10mm. <b>Seeds</b> obliquely obovoid; body 5–6mm, gray-brown to near black; wing ca. 10–13mm. <b>2n</b> =24.</span><!-- |
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|genus=Pinus | |genus=Pinus | ||
|species=Pinus aristata | |species=Pinus aristata | ||
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Revision as of 14:24, 27 July 2019
Trees to 15m; trunk to 1m diam., strongly tapering, twisted; crown rounded, flattened (sheared), or irregular. Bark gray to red-brown, shallowly fissured, with long, flat, irregular ridges. Branches contorted; twigs pale red-brown, aging gray, puberulent, young branches resembling long bottlebrushes because of persistent leaves. Buds ovoid-acuminate, pale red-brown, ca. 1cm, resinous. Leaves 5 per fascicle, upcurved, persisting 10–17 years, (2–)3–4cm × 0.8–1mm, mostly connivent, deep blue-green, with drops and scales of resin, abaxial surface with strong, narrow median groove, adaxial surfaces conspicuously whitened by stomates, margins entire or distantly serrulate, apex conic-acute to conic-subulate; sheath 0.5–1.5cm, scales soon recurving, shed early. Pollen cones ellipsoid, ca. 10mm, bluish to red. Seed cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, lance-cylindric before opening, lance-ovoid to ovoid or cylindric when open, 6–11cm, purple to brown, nearly sessile; apophyses much thickened; umbo central, with triangular base, extended into slender, brittle prickle 4–10mm. Seeds obliquely obovoid; body 5–6mm, gray-brown to near black; wing ca. 10–13mm. 2n =24.
Habitat: Subalpine and alpine
Elevation: 2500–3400m
Distribution
Ariz., Colo., N.Mex.
Discussion
Pinus aristata has leaves usually narrower and sharper than in P. longaeva and P. balfouriana, and the leaves almost always have a narrow, median groove on the abaxial surface.
Selected References
None.
Lower Taxa
None.