Alaska Trees and Shrubs
University of Alaska Press, 2010 M11 15 - 370 páginas
Alaska Trees and Shrubs has been the definitive work on the woody plants of Alaska for more than three decades. This new, completely revised second edition provides updated information on habitat, as well as detailed descriptions of every tree or shrub species in the state. New distribution maps reflect the latest survey data, while the keys, glossary, and appendix on non-native plants make this the most useful guide to Alaska trees and shrubs ever published.
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12 mm long 2.5 cm long Alaska Peninsula Alaska Range alder Alnus Aleutian Islands alpine apex arctic balsam poplar Bark Gray base becoming hairless berries black spruce blueberry bogs British Columbia Brooks Range calyx capsules cassiope catkins cm tall cm wide cones corolla cranberry dark green deciduous dense Distribution dwarf elliptic erect evergreen female catkin ﬁve ﬂat ﬂowers Flowers Clusters catkins Habitat hemlock Hultén interior Alaska Kenai Peninsula Labrador tea Leaf margins light brown lobes long-pointed lower surface mountain ash Sorbus mountain heather multibranched narrow northern ovary Paciﬁc coast paper birch persistent petals petioles pistil plants Prince William Sound reddish reddish-brown resinous rounded scales seeds sepals shiny short short-pointed shrub Sitka spruce slightly slopes smooth southeast Alaska southern species stalks stamens stems stipules subsp teeth toothed treeline trunk diameter tundra Twigs Slender upper surface Vaccinium western white spruce whitish willow willow Salix Winter buds Winter twig Yukon
Página ix - Health (NIH), the National Science Foundation (NSF), and the US Department of Agriculture (USDA).
Página 19 - Moist tundra systems in this region usually form a complete ground cover and are quite productive during the growing season. They vary from almost continuous and uniformly developed cottongrass tussocks with sparse growth of other sedges and dwarf shrubs to stands where tussocks are scarce or lacking and dwarf shrubs are dominant. Associated species are arctagrostis...
Página 7 - The southern part of the coastal forests is composed primarily of Western hemlock and Sitka spruce with a scattering of mountain hemlock, Western red cedar, and Alaska cedar. Red alder is common along streams and beach fringes and on soils recently disturbed by logging and landslides.
Página 20 - Standing water is almost always present in the summer, and in the northern parts, permafrost is close to the surface. Microrelief is provided by peat ridges and polygonal features related to frost action and ice wedges. The vegetation is primarily a sedge and cottongrass mat, usually not formed into tussocks. The few woody plants occur on the driest sites where the microrelief raises them above standing water.
Página 14 - ... are slow growing and seldom exceed 8 inches in diameter or 50 feet in height. Cones of this tree open after fire and spread abundant seed, enabling black spruce to quickly invade burned areas. The slow-growing stunted tamarack is associated with black spruce in the wet lowlands. Like black spruce, it is of little commercial value, seldom reaching a diameter of more than 6 inches. Rolling basins and knolls in the lowlands have a varied mixture of white spruce, black spruce, paper birch, aspen...
Ecology and Management of Sitka Spruce: Emphasizing Its Natural Range in ...
N. Merle Peterson,Patrick Martin
Vista previa limitada - 1997
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