Pinus monophylla
Pinus cembroides
piñón, single leaf pinyon, single-leaf pine, singleleaf pinyon pine
Mexican pinyon, pino piñonero, piñón
red-brown, irregularly furrowed or cross-checked, scaly.
red-brown to dark brown, shallowly and irregularly furrowed, ridges broad, scaly.
spreading and ascending, persistent to near trunk base;
twigs stout, orange-brown, aging brown to gray, sometimes sparsely puberulent.
spreading-ascending;
twigs red-brown, sometimes finely papillate, aging gray to gray-brown.
ellipsoid, light red-brown, 0.5–0.7cm, resinous;
scale margins fringed.
ovoid to short cylindric, pale red-brown, 0.5–1.2cm, slightly resinous.
1(–2) per fascicle, ascending, persisting 4–6(–10) years, 2–6cm × 1.3–2(–2.5)mm, curved, terete (though often 2-grooved), gray-green, all surfaces with stomatal lines, margins entire, apex subulate;
sheath 0.5–1cm, scales soon recurved, forming rosette, shed early.
(2–)3(–4) per fascicle, spreading to upcurved, persisting 3–4 years, 2–6cm × 0.6–0.9(–1)mm, connivent, 2–3-sided, blue- to gray-green, abaxial surface not conspicuously whitened with stomatal bands or if stomatal bands present, these less conspicuous than on adaxial surfaces, often with 2 subepidermal resin bands evident, adaxial surfaces conspicuously whitened with stomatal lines, margins entire to finely serrulate, apex narrowly conic or subulate;
sheath 0.5–0.7cm, scales soon recurved, forming rosette, shed early.
ellipsoid, ca. 10mm, yellow.
ellipsoid, to 10mm, yellow.
cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly depressed-ovoid to nearly globose when open, 4–6(–8)cm, pale yellow-brown, nearly sessile;
apophyses thickened, slightly raised;
umbo subcentral, raised or depressed, nearly truncate, apiculate.
cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly depressed-ovoid to nearly globose when open, 1–3.5cm, pale yellow- to pale red-brown, resinous, nearly sessile or short-stalked;
apophyses thickened, slightly domed, angulate, transversely keeled;
umbo subcentral, slightly raised to depressed, truncate or umbilicate.
=24.
=24.
Pinus monophylla
Pinus cembroides
Pinus monophylla hybridizes with P. edulis and P. quadrifolia.
Singleleaf pinyon (Pinus monophylla) is the state tree of Nevada.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pinus cembroides is the common pinyon of Mexican commerce. Populations of the Edwards Plateau, Texas, are disjunct about 150km east and north of the main area of distribution of the species, and they have been described as a distinct variety, P. cembroides var. remota Little, on the basis of thin seed shell and a higher frequency of 2-leaved fascicles in contrast to the thicker seed shell and prevalently 3-leaved fascicles in Mexican pinyon populations to the west and south. The strong overlap in nearly all character states between the populations of the Edwards Plateau and other populations makes var. remota difficult to maintain.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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Flora NW
PNW Herbaria
WildflowerSearch
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USDA Plants Database
