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Colorado pinyon, pinyon, piñon pine, piñón, two needle pinyon pine, two-needle pinyon

big-cone pine, Coulter pine

Habit Shrubs or trees to 21m; trunk to 0.6m diam., strongly tapering, erect; crown conic, rounded, dense. Trees to 24m; trunk to 1m diam., straight to contorted; crown broad, thin, irregular.
Bark

red-brown, shallowly and irregularly furrowed, ridges scaly, rounded.

dark gray-brown to near black, deeply furrowed, with long, scaly, irregularly anastomosing, rounded ridges.

Branches

persistent to near trunk base;

twigs pale red-brown to tan, rarely glaucous, aging gray-brown to gray, glabrous to papillose-puberulent.

often ascending;

twigs stout to moderately slender, violet-brown, often glaucous, aging gray-brown, rough.

Buds

ovoid to ellipsoid, red-brown, 0.5–1cm, resinous.

ovoid, deep red-brown, 1.5(–3)cm, resinous;

scale margins white-fringed, apex cuspidate.

Leaves

(1–)2(–3) per fascicle, upcurved, persisting 4–6 years, 2–4cm × (0.9–)1–1.5mm, connivent, 2-sided (1-leaved fascicles with leaves 2-grooved, 3-leaved fascicles with leaves 3-sided), blue-green, all surfaces marked with pale stomatal bands, particularly the adaxial, margins entire or finely serrulate, apex narrowly acute to subulate;

sheath 0.5–0.7cm, scales soon recurved, forming rosette, shed early.

3 per fascicle, slightly spreading, not drooping, mostly ascending in a brush, persisting 3–4 years, 15–30cm × ca. 2mm, slightly curved or straight, twisted, dusty gray-green, all surfaces with pale, fine stomatal lines, margins serrulate, apex abruptly subulate;

sheath 2–4cm, base persistent.

Pollen cones

ellipsoid, ca. 7mm, yellowish to red-brown.

ovoid to cylindric, to 25mm, light purple-brown, aging orange-brown.

Seed(s)

cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, depressed-ovoid to nearly globose when open, ca. (3.5–)4(–5)cm, pale yellow- to pale red-brown, resinous, nearly sessile to short-stalked;

apophyses thickened, raised, angulate;

umbo subcentral, slightly raised or depressed, truncate or umbilicate.

cones maturing in 2 years, gradually shedding seeds thereafter and moderately persistent, massive, heavy, drooping, asymmetric at base, narrowly ovoid before opening, ovoid-cylindric when open, 20–35cm, pale yellow-brown, resinous, stalks to 3cm;

apophyses transverse-rhombic, strongly and sharply cross-keeled, elongate, curved, continuous with umbos to form long, upcurved claws 2.5–3cm.

2n

=24.

=24.

Pinus edulis

Pinus coulteri

Habitat Dry mountain slopes, mesas, plateaus, and pinyon-juniper woodland Dry rocky slopes, flats, ridges, and chaparral, transitional to oak-pine woodland
Elevation 1500–2100(–2700)m (4900–6900(–8900)ft) 300–2100m (1000–6900ft)
Distribution
from FNA
AZ; CA; CO; NM; OK; TX; UT; WY; Mexico in Chihuahua
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico in Baja California
[WildflowerSearch map]
[BONAP county map]
Discussion

Pinus edulis var. fallax Little (P. californiarum subsp. fallax (Little) D.K.Bailey) appears to combine features of P. edulis and P. monophylla. More study is needed.

Seeds of Pinus edulis, the commonest southwestern United States pinyon, are much eaten and traded by Native Americans.

Pinyon (Pinus edulis) is the state tree of New Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Pinus coulteri is the heaviest-coned pine; one who seeks its shade should wear a hardhat.

(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. 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. strobiformis, 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. 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. strobiformis, P. strobus, P. sylvestris, P. taeda, P. torreyana, P. virginiana, P. washoensis
Synonyms Caryopitys edulis, P. cembroides var. edulis
Name authority Engelmann: in Wislizenus, Mem. Tour N. Mexico 88. (1848) D. Don: Trans. Linn. Soc. London, Bot. 17: 440. (1836)
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