Postelsia TO 
°; thence southward to Wyoming and the 
a9 
Sierras of southern California. 
This tree is not reported from Vancouver 
Island, but as it grows in the adjacent Coast 
ranges of the mainland, it may occur in the high 
mountains of the northern and central parts of 
the island. 
ovine Adanson. Fam. Pl. 2480. 1763: 
A genus differing from Pinas chiefly in the 
cones, which ripen the first year and have un- 
thickened scales, and in the leaves, which are 
deciduous, scattered and spirally arranged on 
the long shoots of the tree, crowded and forming 
many-leaved fascicles on the dwarf shoots. 
Whree species occur in North America, none of 
which is reported from Vancouver Island. One, 
Larix laricina (Du Roi) Koch., a swamp- 
inhabiting tree of northeastern North America, 
finds its western limit in the Rocky Mountains of 
northern British Columbia and the Yukon re- 
gion; one, Larix occidentalis Nuttall, is a large 
tree of the semi-arid region east of the Cascade 
Mountains; the third, Larix Lyallit Parlatore, 
an alpine tree occurring near timber line in the 
