Burke: Pinus ponderosa vs. Pinus rigida

	Pinus ponderosa	Pinus rigida
	bull pine, ponderosa pine, western yellow pine
Habit	Large forest tree up to 70 m. tall.
Bark	Bark thick, that of younger trees deeply furrowed and dark reddish-brown or blackish, gradually changing to cinnamon-red in older trees, divided into large plates that freely flake off.
Leaves	Needles usually in clusters of 3 toward the branch ends, 12-20 cm. long, yellowish-green, on spur branches that are ultimately deciduous with the needles.
Cones	Staminate cones yellow to purplish, strongly clustered, crowded at the base of shoots of the current season; ovulate cones near the branch tips, reddish-purple when young, sub-sessile, nearly horizontal, becoming reddish-brown, then brown when mature, broadly ovate, 8-14 cm. long, the scales chocolate-brown, with a thickened, yellowish-brown, strongly prickly tip.

	Pinus ponderosa	Pinus rigida
Habitat	Mostly dry areas in open forests at low to middle elevations.
Distribution	Occurring mostly east of the Cascades crest in Washington; British Columbia to Baja California, east to the Great Plains. [WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Not of concern
Sibling taxa	P. albicaulis, P. contorta, P. monticola	P. albicaulis, P. contorta, P. monticola, P. ponderosa
Subordinate taxa	P. ponderosa var. ponderosa
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Pinus ponderosa

Pinus rigida

bull pine, ponderosa pine, western yellow pine

Habit

Large forest tree up to 70 m. tall.

Bark

Bark thick, that of younger trees deeply furrowed and dark reddish-brown or blackish, gradually changing to cinnamon-red in older trees, divided into large plates that freely flake off.

Leaves

Needles usually in clusters of 3 toward the branch ends, 12-20 cm. long, yellowish-green, on spur branches that are ultimately deciduous with the needles.

Cones

Staminate cones yellow to purplish, strongly clustered, crowded at the base of shoots of the current season; ovulate cones near the branch tips, reddish-purple when young, sub-sessile, nearly horizontal, becoming reddish-brown, then brown when mature, broadly ovate, 8-14 cm. long, the scales chocolate-brown, with a thickened, yellowish-brown, strongly prickly tip.