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Related to microsporophyll: microsporangium, microsporangia


A leaflike structure that bears microsporangia.


(Botany) a leaf on which the microspores are formed: corresponds to the stamen of a flowering plant. Compare megasporophyll
[C19: from micro- + sporophyll]


(ˌmaɪ krəˈspɔr ə fɪl, -ˈspoʊr-)

a leaflike organ bearing microsporangia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microsporophyll - in non-flowering plants, a sporophyll that bears only microsporangiamicrosporophyll - in non-flowering plants, a sporophyll that bears only microsporangia
sporophyl, sporophyll - leaf in ferns and mosses that bears the sporangia
References in periodicals archive ?
Leaflet size 16-29 x 3.8-4.6 cm 30-45 x 2.2-4 cm Leaflet shape Straight (not falcate) Falcate Leaflet dentation Teeth present below Margins entire or with distal half, 20 or more few teeth (<16) limited per leaflet to distal half Stem length To 1.1 m To 4 m Pollen strobilus To 14 x 3 cm To 31 x 4.5 cm size Microsporangia 37-43 41-63 per microsporophyll vule attachment vules not attached to vules attached to flattened tomentose flattened tomentose ppendages protruding ppendages protruding beyond bullae beyond bullae Sclerotesta size -2.3 cm long x 1.4-1.8 .8-3.6 cm long x cm wide 2.1-2.4 cm wide
Pollen strobili two to six per stem apex, to 14 x 3 cm, yellow-beige tomentose, peduncles to 6.5-8.0 x 1-1.4 cm, yellow-beige tomentose with green undertones; microsporophylls arranged in 14-16 orthostichies of 16-25 fertile sporophylls each, obtrullate, 10-11 x 89 mm at pollen shedding, bullae encompassing 1/4 to 1/3 of total length of sporophyll, beige-yellow tomentose, face hexagonal, 5-5.2 x 4.2-4.5 mm, distal facet shallowly indented, microsporangia 37-43, 1.2 x 1 mm, limited to the abaxial surface and aggregated into a single group, lower half of pedicels without microsporangia.
microsporophyll: Leaflike structure giving rise to one or more microsporangia.
It is interpreted as a male cone composed of peltate microsporophylls, the elongate sporangia being attached to the heel of the microsporophyll and parallel to the stalk.
In other forms the terminal telomes may have undergone the same processes as in the carpel, and a broad expanded microsporophyll resulted, as in the Magnoliaceae (Can, right, 1952).
Microsporophyll lamina soft, not dorsiventrally thickened,
Isoetes is heterosporous, with each leaf a potential microsporophyll or megasporophyll.
The compound pollen strobili of Austrotaxus have a unique arrangement whereby the stalks of the microsporophylls are vestigial, the microsporangia of each microsporophyll are fused to each other and partially adnate to the microsporophyll itself (Saxton, 1934; Wilde, 1975).