gymnosperm

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gymnosperm:

see angiospermangiosperm
, term denoting seed plants in which the ovules, or young seeds, are enclosed within the ovary (that part of the pistil specialized for seed production), in contrast to the gymnosperms, in which the seeds are not enclosed within an ovary.
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gymnosperm

[′jim·nə‚spərm]
(botany)
The common name for members of the division Pinophyta; seed plants having naked ovules at the time of pollination.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Pteridosperms form a heterogeneous group of gymnospermous plants with fernlike foliage and were widely distributed during the late Paleozoic.
These reports, and an increasing record of vine- to liana-like growth habits among permineralized taxa from localities elsewhere in Europe, Asia, and North America (e.g., Pigg et al., 1987; Robler, 2000), show that scrambling and/or climbing growth habits were much more widely distributed in this group of gymnospermous plants than commonly thought.
The gymnospermous family Podocarpaceae, sometimes referred to as "southern conifers," has an ancient history and relict distribution combined with extensive and extreme variation in chromosome number of its diploid species (Hair, 1963, 1966; Hair & Beuzenberg, 1958a, 1958b).
The same applies to ruminate storage tissues of gymnospermous seeds, as reported for Araucariaceae (Coulter & Chamberlain, 1910), Gnetaceae (Schnarf, 1933), Phyllocladaceae (Coulter & Chamberlain, 1910), Taxaceae (Oliver, 1902; Coulter & Land, 1905; Lotsy, 1911), and, less pronounced, Cupressaceae, Ephedraceae, and Cephalotaxaceae (Tamamshjan, 1951).