Alnus glutinosa thrives best in moist soils, and grows under favourable circumstances to a height of 20-30 m, though often less. It is characterized by its 5–10 cm short-stalked rounded leaves 6–12 cm long, becoming wedge-shaped at the base and with a slightly toothed margin. When young they are somewhat glutinous, whence the specific name, becoming later a glossy dark green. As with some other plants growing near water it keeps its leaves longer than do trees in drier situations, the glossy green foliage lasting after other trees have put on the red or brown of autumn, which renders it valuable for landscape effect. As the Latin name glutinosa implies, the buds and young leaves are slightly sticky with a resinous gum.
There are four subspecies:
The species is monoecious. Flowers are wind-pollinated catkins: the slender cylindrical male catkins are pendulous, reddish in colour and 5–10 cm long; the female are smaller, 2 cm in length and dark brown to black in colour, hard, somewhat woody, and superficially similar to some conifer cones. When the small winged seeds have been scattered the ripe, woody, blackish cones remain, often lasting through the winter. The alder is readily propagated by seeds, but throws up root suckers abundantly.
An investigation of some physical and mechanical properties of laminated veneer lumber manufactured from black alder (Alnus glutinosa) glued with polyvinyl acetate and polyurethane adhesives.
Sep 01, 2006; Abstract This study was designed to determine some physical and mechanical properties of laminated veneer lumber (LVL) made of...
Combustion properties of alder (Alnus glutinosa L.) Gaertn. subsp, barbata (C.A. Mey) Yalt.) and southern pine (pinus sylvestris L.) wood treated with boron compounds.
Nov 01, 2008; Abstract Samples from alder (Alnus glutinosa L.) Gaertn. subsp, barbata (C.A. Mey) Yalt.) and southern pine (Pinus sylvestris L.)...