angiosperm

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angiosperm

(ăn`jēəspûrm'), 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. The angiosperms constitute the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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 and include all agricultural crops (including the cereal grains and other grasses), all garden flowers and most horticultural plants, all the common broad-leaved shrubs and trees, and all the usual field, garden, and roadside weeds. The angiosperms are the most economically important group of all plants.

angiosperm

[′an·jē·ō‚spərm]
(botany)
The common name for members of the plant division Magnoliophyta.

angiosperm

A class of seed plants (having seeds enclosed in an ovary) which includes most of the world’s flowering plants.
References in periodicals archive ?
This analogy is not so fanciful as it seems, if the suggestion of Endress (2011) that anatropous ovules are ancestral in angiosperms.
This is no longer the case, as now more or less detailed phylogenetic frameworks for the angiosperms and for many subgroups at various levels of angiosperm phylogeny (orders, families, genera) are available.
However, from its distribution across angiosperms it appears that there are many clades in which it was not (yet) a key innovation (Endress, 2011).
The tiny size of the plant supports other evidence depicting the first angiosperms as small herb-like plants rather than trees, Taylor says.
He said that many of the early angiosperms were small, herbaceous or shrubby "weedy plants", so when wildfires - especially surface fires - frequently swept through an area, it created a positive feedback cycle.
However, no such correlation exists in angiosperms or gymnosperms, suggesting that chromosomal structure is highly dynamic in seed plants, but not in ferns.
At that time, the angiosperms or flowering plants -- a group that includes grasses and deciduous trees -- were starting to compete seriously with the more established type of land plant called gymnosperms, which includes coniferous trees.
and grains of Orectanthe are amongst the largest in Angiosperms (Mabberley, 2008).
Flowering plants, called angiosperms, evolved about 120 million years ago, during the Cretaceous Period, and took another 20 million years to become prevalent.
Basal chromosome counts for fern genera are significantly higher than similar values from angiosperms (homosporous ferns n = 57.
The modern New Zealand fern flora includes some 200 species in -60 genera, but, in contrast to dicot angiosperms, few ferns appear to have become extinct in New Zealand, perhaps because of its constantly mesic climate through the Cenozoic.