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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
from FNA
AZ; NM; TX; n Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
DE; GA; MD; NC; NJ; PA; SC; TN; VA; WV
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[BONAP county map]
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
P. albicaulis, P. aristata, P. attenuata, P. balfouriana, P. banksiana, P. cembroides, P. clausa, P. contorta, P. coulteri, P. echinata, P. edulis, P. elliottii, P. engelmannii, P. flexilis, P. glabra, P. jeffreyi, P. lambertiana, P. leiophylla, P. longaeva, P. monophylla, P. monticola, P. muricata, P. palustris, P. ponderosa, P. pungens, P. quadrifolia, P. radiata, P. resinosa, P. rigida, P. sabiniana, P. serotina, P. strobus, P. sylvestris, P. taeda, P. torreyana, P. virginiana, P. washoensis
P. albicaulis, P. aristata, P. attenuata, P. balfouriana, P. banksiana, P. cembroides, P. clausa, P. contorta, P. coulteri, P. echinata, P. edulis, P. elliottii, P. engelmannii, P. flexilis, P. glabra, P. jeffreyi, P. lambertiana, P. leiophylla, P. longaeva, P. monophylla, P. monticola, P. muricata, P. palustris, P. ponderosa, P. quadrifolia, P. radiata, P. resinosa, P. rigida, P. sabiniana, P. serotina, P. strobiformis, P. strobus, P. sylvestris, P. taeda, P. torreyana, P. virginiana, P. washoensis
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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