Pinus strobiformis |
Pinus pungens |
|
---|---|---|
Chihuahua white pine, Mexican white pine, pino enano, Southwestern white pine |
hickory pine, mountain pine, prickley pine, table mountain pine |
|
Habit | Trees to 30m; trunk to 0.9m diam., slender, straight; crown conic, becoming rounded to irregular. | Trees to 12m; trunk to 0.6m diam., straight to crooked, erect to leaning, poorly self-pruning; crown irregularly rounded or flattened. |
Bark | gray, aging red-brown, furrowed, with narrow, irregular, scaly ridges. |
red- to gray-brown, irregularly checked into scaly plates. |
Branches | spreading-ascending; twigs slender, pale red-brown, puberulous or glabrous, sometimes glaucous, aging gray or gray-brown, smooth. |
horizontally spreading; twigs slender, orange- to yellow-brown, aging darker brown, rough. |
Buds | ellipsoid, red-brown, ca. 1cm, resinous. |
ovoid to cylindric, red-brown, 0.6–0.9cm, resinous. |
Leaves | 5 per fascicle, spreading to ascending-upcurved, persisting 3–5 years, 4–9cm × 0.6–1mm, straight, slightly twisted, pliant, dark green to blue-green, abaxial surface without evident stomatal lines, adaxial surfaces conspicuously whitened by narrow stomatal lines, margins sharp, razorlike and entire to finely serrulate, apex narrowly acute to short-subulate; sheath 1.5–2cm, shed early. |
2(–3) per fascicle, spreading or ascending, persisting 3 years, 3–6(–8)cm × 1–1.5mm, twisted, deep yellow-green, all surfaces with fine stomatal lines, margins harshly serrulate, apex acute to short-acuminate; sheath 0.5–1cm, base persistent. |
Pollen cones | cylindric, ca. 6–10mm, pale yellow-brown. |
ellipsoid, ca. 15mm, yellow. |
Seed(s) | cones maturing in 2 years, shedding seeds and falling soon thereafter, pendent, symmetric, lance-cylindric before opening, broadly lance-cylindric when open, 15–25cm, creamy brown to light yellow-brown, stalks to 6cm; apophyses somewhat thickened, strongly cross-keeled, tip reflexed; umbo terminal, low. |
cones maturing in 2 years, variably serotinous, mostly whorled, downcurved, asymmetric, ovoid before opening, broadly ovoid when open, (4–)6–10cm, gray- to pale red-brown, nearly sessile or on stalks to 1cm; apophyses thickened, diamond-shaped, strongly keeled, elongate, mammillate at cone base abaxially; umbo central, a stout, curved, sharp claw. |
2n | =24. |
=24. |
Pinus strobiformis |
Pinus pungens |
|
Habitat | Arid to moist summit elevations, montane forests | Dry, mostly sandy or shaly uplands, Appalachians and associated Piedmont |
Elevation | 1900–3000m (6200–9800ft) | 500–1350m (1600–4400ft) |
Distribution |
AZ; NM; TX; n Mexico
|
DE; GA; MD; NC; NJ; PA; SC; TN; VA; WV
|
Discussion | In the northern part of the range, Pinus strobiformis overlaps P. flexilis and reportedly hybridizes with it. On average P. strobiformis has longer, more slender leaves and thinner, more spreading-tipped apophyses than are found in P. flexilis, and stomatal bands are not evident on the abaxial surface of its leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pinus pungens is a scrub pine and is too small and knotty to be much utilized except for pulpwood and firewood. Its common name refers to a general type of landform, not to a specific, named mountain. (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. ayacahuite var. brachyptera, P. ayacahuite var. reflexa, P. ayacahuite var. strobiformis, P. flexilis var. reflexa, P. reflexa | |
Name authority | Engelmann: in Wislizenus, Mem. Tour N. Mexico 102. (1848) | Lambert: Ann. Bot. (London) 2: 198. (1805) |
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