11. PINUS MONTICOLA
- 1837 P. monticola Douglas ex Lambert, Gen. Pin. iii. t.
- 1884 P. porphyrocarpa Lawson, Pinet. Brit. i, 83, ff.
Spring-shouts pubescent. Leaves from 4 to 10 cm. long, serrulate; stomata ventral or rarely with a few dorsal stomata; resin-ducts external. Cones from 10 to 25 cm. long, cylindrical or tapering, sometimes curved; apophyses brown-ochre or fulvous brown, thin, smooth, conforming to the surface of the cone, the apex sometimes slightly prolonged and reflexed, the umbo not quite touching the surface of the scale below.
The western White Pine grows in southern British Columbia and on Vancouver Island, on the Rocky Mountains of Montana and Idaho, in Washington, on the Blue Mountains, Cascades and Coast Range of Oregon, across northern California and along the Sierras to the mountains of southern California. Where it is abundant and accessible it furnishes valuable timber. It is hardy in New England and in northern and central Europe.
It differs from P. strobus in the higher phyllotaxis of its cone, an obvious difference that may be seen by comparing cones of the two species of the same length (figs. 117, 119), the number of scales on the cone of P. monticola being much greater than that on the cone of P. strobus. Nuttall (Sylva, iii, 118) followed Hooker in considering it to be a variety of P. strobus.
Fig. 117, Cone and cone-scale. Fig. 118, Leaf-fascicle and magnified leaf-section.
12. PINUS STROBUS
- 1753 P. strobus Linnaeus, Sp. Pl. 1001.
- 1855 P. nivea Booth ex Carrière, Trait. Conif. 305.
- 1862 P. alba-canadensis Provancher, Fl. Canad. ii. 554.
- 1903 Strobus strobus Small, Fl. Southeast. U. S. 29.