How To Use Microsporophyll In A Sentence
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The lunate microsporophylls and densely packed sporangia are consistent with the morphology of other noeggerathialean cones, such as Discinites Feistmanlel.
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Each fertile shoot is composed of two fused bracteoles, which surround the microsporophyll.
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Both cone types are of comparable size with helically arranged, imbricate microsporophylls, and have microsporophyll head abaxial cuticles with a thicker papillate central region and a thinner, nonpapillate marginal region.
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These, as in Gymnosperms, are of two kinds, microspores or pollen-grains, borne in the stamens (or microsporophylls) and megaspores, in which the egg-cell is developed, contained in the ovule, which is borne enclosed in the carpel (or megasporophyll).
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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These, as in Gymnosperms, are of two kinds, microspores or pollen-grains, borne in the stamens (or microsporophylls) and megaspores, in which the egg-cell is developed, contained in the ovule, which is borne enclosed in the carpel (or megasporophyll).
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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In contrast, C. comptonensis microsporophyll heads have a cutinized hypodermis, and distinctly conical epidermal papillae with pointed apices.
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The microsporophylls of cycads are arranged in strobili and bear clusters of microsporangia on their abaxial surface.
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The microsporophyll of Lepidopteris has been reconstructed as a pinnate axis with short branches bearing clusters of small elongate pollen sacs fused at the base.