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|Family: Pinaceae||View Description||Dichotomous Key|
|Genus: Pinus||View Description||Dichotomous Key|
|Species: Pinus ponderosa||View Description||Dichotomous Key|
Pinus ponderosa var. washoensis (H. Mason & Stockw.) J.R. Haller & Vivrette
Stem: trunk < 35 m, < 1.5 m wide; mature bark generally medium to dark red- or yellow-brown, generally shallow-furrowed; mature crown short, conic or flat-topped. Leaf: 3 per bundle, 12--17 cm, 1.8--2.4 mm wide, very thick, light green, +- glaucous; sheath persistent. Seed Cone: spreading, generally 5--11 cm, ovate or generally conic, when immature dark red-purple, maturing closed cones +- green to dark purple; stalk < 2 cm; scales adaxially generally brown, abaxially generally brown with black striations, occasionally black, in open cone very crowded; knob prickles varied, generally straight, parallel to cone edge.
Ecology: Upper mixed-conifer to lower subalpine; Elevation: (1400)2000--3000 m (generally hybridizes with Pinus ponderosa at 1700--2000 m; growing near but not hybridizing with Pinus jeffreyi at 1800--2100 m). Bioregional Distribution: CaRH, n SNH, Wrn; Distribution Outside California: to British Columbia, western Nevada.
Synonyms: Pinus washoensis H. Mason & Stockw.
eFlora Treatment Author: J. Robert Haller & Nancy J. Vivrette
Jepson Online Interchange
Previous taxon: Pinus ponderosa var. ponderosa
Next taxon: Pinus quadrifolia
Citation for this treatment: J. Robert Haller & Nancy J. Vivrette 2017. Pinus ponderosa var. washoensis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=93844, accessed on April 30, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 30, 2017.