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Conifer Conifers are woody plants so named because they bear their seeds upon
hard or papery scales arranged in spirals or whorls around an axis, forming a
cone. Typically, they are evergreen, upright trees and shrubs, but not all
This condition, called polyembryony, is universal among conifers, but competition
among the several to numerous embryos generally results in elimination of all but
one; only rarely do two or more viable embryos develop in a single seed.
Many conifers carry on photosynthesis more efficiently than broad-leaved
hardwoods because their needles have a relatively higher concentration of
chlorophyll. Conifers in cool areas continue photosyn- thetic processes at
temperatures as ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review