Pinus engelmannii |
Pinus aristata |
|
---|---|---|
Apache pine, Arizona longleaf pine, pino real |
bristlecone pine, Colorado bristlecone pine, Rocky Mountain bristlecone pine |
|
Habit | Trees to 35m; trunk to 0.6m diam., straight; crown irregularly rounded, rather thin. | Trees to 15m; trunk to 1m diam., strongly tapering, twisted; crown rounded, flattened (sheared), or irregular. |
Bark | dark brown, at maturity deeply furrowed, ridges becoming yellowish, of narrow, elongate, scaly plates. |
gray to red-brown, shallowly fissured, with long, flat, irregular ridges. |
Branches | straight to ascending; twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough. |
contorted; twigs pale red-brown, aging gray, puberulent, young branches resembling long bottlebrushes because of persistent leaves. |
Buds | ovoid-conic, to 2cm, resinous; scale margins pale fringed. |
ovoid-acuminate, pale red-brown, ca. 1cm, resinous. |
Leaves | 3(–5) per fascicle, spreading-ascending, often drooping, forming a brush at twig tips, persisting 2 years, (20–)25–45cm × 2mm, dull green, all surfaces with fine stomatal lines, margins coarsely serrulate, apex conic-subulate; sheath 3–4cm, base persistent. |
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 | cylindric, ca. 25mm, yellow to yellow-brown. |
ellipsoid, ca. 10mm, bluish to red. |
Seed(s) | cones maturing in 2 years and shedding seeds soon thereafter, not persistent, terminal, sometimes curved, often asymmetric, lance-ovoid before opening, ovoid when open, 11–14cm, light dull brown, nearly sessile or short-stalked; apophyses rhombic, somewhat to quite elongate, strongly raised toward outer cone base, sometimes curved, strongly cross-keeled, narrowed to thick, curved, broadly triangular-based umbo, this often producing outcurved claw. |
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. |
2n | =24. |
=24. |
Pinus engelmannii |
Pinus aristata |
|
Habitat | High and dry mountain ranges, valleys, and plateaus | Subalpine and alpine |
Elevation | 1500–2500m (4900–8200ft) | 2500–3400m (8200–11200ft) |
Distribution |
AZ; NM; Mexico
|
AZ; CO; NM
|
Discussion | In general appearance Pinus engelmannii much resembles P. palustris with its short-persistent, long leaves (but in this species drooping) and in its tendency to form a grass stage. It has a deep taproot as do P. palustris and P. ponderosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Pinaceae > Pinus | Pinaceae > Pinus |
Sibling taxa | ||
Synonyms | P. macrophylla, P. apacheca, P. latifolia | P. balfouriana var. aristata |
Name authority | Carrière | Engelmann: in Parry & Engelmann, Amer. J. Sci. Arts ser. 2, 34: 331. (1862) |
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