from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several deciduous, coniferous trees of the genus Larix, having needlelike leaves clustered on short shoots and heavy, durable wood.
- n. The wood of these trees.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A coniferous tree, of genus Larix, having deciduous leaves, in fascicles.
- n. The wood of the larch.
from the GNU version of the Collaborative International Dictionary of English
- n. A genus of coniferous trees, having deciduous leaves, in fascicles (see Illust. of fascicle).
from The Century Dictionary and Cyclopedia
- n. Any coniferous tree of the genus Larix.
- n. A commercial name for the lumber of the noble fir, Abies nobilis. See noble fir.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. wood of a larch tree
- n. any of numerous conifers of the genus Larix all having deciduous needlelike leaves
Our deciduous evergreens tamaracks, also called larch and hackmatack are filling in with fresh bright needles, some white water-flower was blooming spikes out in the bog, and white lady-slipper orchids bloomed right at the edge of the road.
A gum called larch-tree sulphur, chewed by both natives and settlers, is also obtained from these forests.
My larch is a weeping variety that has been trained to grow in an upward spiral.
A piece of dry wood, as much as a cubit, stands over the ground, either of oak or of larch, which is not rotted by rain; and two white stones are placed on either side, in the narrow part of the way;  but the racecourse around is level: either it is the monument  of some man long since dead, or perhaps it has been a goal in the time of former men, and now swift-footed noble Achilles has appointed it the goal.
Some rare poppies and buttercups have also been found in addition to small amounts of arboreal material such as larch needles, willows, and tree bark.
I agree that it is primarily Engelman spruce sites that have not been archived and I've accordingly changed "larch" to "Engelman spruce" in the post.
Personlly, I'd buy the tamarack definition: the words are fairly similar, and the further north you go into NH and Maine, the more you hear "larch" called "tamarack".
When a man set out to build a tannery, he used to go into the woods where he could be sure of enough oak trees to supply him for many years with the bark from which tannin is made; but it has been found that the bark of several other kinds of trees, such as larch, chestnut, spruce, pine, and hemlock, will tan as well as that of oak.
Around four hectares of invasive rhododendron is being eradicated and one hectare of other non-native species such as larch is being thinned out.
Today, by comparison, they are increasingly a blend of native broadleaf species, such as larch, oak, willow and ash, with neat rows of Douglas firs and Sitka spruces.