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Related to megasporophyll: microsporophyll, megasporangium


A leaflike structure that bears megasporangia.


(Botany) a leaf on which the megaspores are formed: corresponds to the carpel of a flowering plant. Compare microsporophyll
[C20: from mega- + sporophyll]


(ˌmɛg əˈspɔr ə fɪl, -ˈspoʊr-)

a sporophyll producing megasporangia only.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megasporophyll - in non-flowering plants, a sporophyll that bears only megasporangiamegasporophyll - in non-flowering plants, a sporophyll that bears only megasporangia
sporophyl, sporophyll - leaf in ferns and mosses that bears the sporangia
References in periodicals archive ?
norstogii show a light brown to ochre tomentum on the megasporophyll lobule near the horns, whereas C.
Ovulate strobili one or two per apex, erect, cylindrical, beige-yellow tomentose when juvenile, at maturity turning beige-tomentose to glabrous green, 10-30 x 7-11.4 cm, sterile apex obtuse or pungent, 1-2 cm long, strobilus axis glabrous; peduncles 2-5 x 1.5-3 cm, beige-yellow to grey-brown tomentose; megasporophylls arranged in 5-8 orthostichies of 3-9 sporophylls each, megasporophyll pedicels 2.5-3.5 cm long, glabrous, bullae with hexagonal to oblong-hexagonal distal face 2.4-3 x 5-5.2 cm and 1-1.4 cm thick, terminal facet broad, slightly protruding, and indented.
On another occasion we observed termites excavating galleries in the megasporophyll and seed sarcotesta tissues of a female C.
moorei plants produce seeds on a large strobilus (megasporophyll) which typically contain 300-360 seeds (Jones 1993:44; Low 1991:138; Rolf Kyburz; pets.
Other, younger, species of Cordianthus exhibited reduction from the above condition in that the telome system, composed of mesomes and telomes (termed by Florin a "megasporophyll") was much shortened, unbranched, and bore but one ovule at the apex.
microsporophylls, pectinate megasporophyll apices, glabrous ovules, and
each megasporophyll with a proximal stalked portion bearing 2-10
Isoetes is heterosporous, with each leaf a potential microsporophyll or megasporophyll. There are scattered reports in the literature of the odd sporangium containing both microspores and megaspores, but this is rare and apparently insignificant.
The Taxaceae aril is the fleshy part of the megasporophyll and the apex of the axillary shoot (Chamberlain, 1935; Coulter & Chamberlain, 1917; Florin, 1954; Wilde, 1944).
In Encephalartos and Stangeria, male and female cones (referred to as microsrobili and megastrobili, respectively) typically consist of a central axis to which numerous tightly-packed cone scales (termed microsporophylls in males and megasporophylls in females) are attached (Fig.
leaflike, loosely arranged, multiovulate megasporophylls, and it is
exposed to light entering between megasporophylls, from April to August.