Difference between revisions of "Pinus quadrifolia"
U.S.D.A. Div. Forest. Bull. 14: 17. 1897.
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|common_names=Parry pinyon;piñón | |common_names=Parry pinyon;piñón | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Pinus parryana | |name=Pinus parryana | ||
|authority=Engelmann | |authority=Engelmann | ||
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|publication year=1897 | |publication year=1897 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_30.xml |
|genus=Pinus | |genus=Pinus | ||
|species=Pinus quadrifolia | |species=Pinus quadrifolia | ||
Revision as of 18:55, 24 September 2019
Trees to 10m; trunk to 0.5m diam., straight, much branched; crown dense, becoming rounded. Bark red-brown, irregularly furrowed and cross-checked to irregularly rectangular, plates scaly. Branches spreading to ascending, persistent to trunk base; twigs slender, pale orange-brown, puberulent-glandular, aging brown to gray-brown. Buds ovoid, light red-brown, ca. 0.4–0.5cm, slightly resinous. Leaves (3–)4(–5) per fascicle, persisting 3–4 years, (2–)3–6cm × (1–)1.2–1.7mm, curved, connivent, stiff, green to blue-green, margins entire to minutely scaly-denticulate, finely serrulate, apex subulate, adaxial surfaces mostly strongly whitened with stomatal bands, abaxial surface not so but 2 subepidermal resin bands evident; sheath 0.5–0.6cm, scales soon recurved, forming rosette, shed early. Pollen cones ovoid, ca. 10mm, yellowish. Seed cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly ovoid to depressed-globose when open, (3–)4–8(–10)cm, pale yellow-brown, sessile to short-stalked, apophyses thickened, strongly raised, diamond-shaped, transversely keeled, umbo subcentral, low-pyramidal or sunken, blunt. Seeds obovoid, body ca. 15mm, brown, wingless.
Habitat: Dry rocky sites
Elevation: 1200–1800m
Distribution
Calif., Mexico in Baja California.
Discussion
Pinus quadrifolia is the rarest pinyon in the flora. It hybridizes naturally with P. monophylla.
Selected References
None.