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 ?
This ensures a more inclusive and updated calibration of phylogenetic trees including not only angiosperms, but also gymnosperms and ferns, due to a higher number of internal nodes being dated, distributed among the entire tree of euphyllophytes.
Characterization of MADS genes in the gymnosperm Gnetumparvifoliumand its implication on the evolution of reproductive organs in seed plants.Evol.Dev.1(3): 180-190.
Tukey's multiple comparison of the means of leaf litter material accumulated among the forest covers (F), restored areas after harvesting gymnosperm forest plantations (RA-forestry), and open pastures (P).
These assemblies will enable future identification and study of gymnosperm genes, the assistance of forest management strategies, and the understanding of the environmental and biological interactions of spruce trees [89].
gattii has been reported from 54 tree species; most (77%) are angiosperms; gymnosperms account for 23% of positive species (Table 2).
Yes, there is undisputed evidence of the presence of gymnosperm and flowering plant pollen as well as preserved flowers and cones, in sediments of proposed flood origin.
Angiosperm wood lignin was more easily degradable than gymnosperm wood lignin by white-rot fungi because of a very high concentration of G units in the gymnosperm woods (Faix et al.
Fire-prone cordaitalean (gymnosperm) forests covered the alluvial plains and basin-margin uplands.
Numerous gymnosperm cones were floating on the water in the excavation; these included white pine (Pinus strobus), tamarack (Larix laricina), probable black spruce (Picea mariana, and white cedar (Thuja occidentalis).
The invention also provides a transgenic seed plant, such as an angiosperm or gymnosperm, that contains a recombinant nucleic acid molecule of the invention.