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In botany, a sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls , or microsporangia and are called microsporophylls .
The fertile fronds are shorter, 40–65 cm (16–26 in) long, brown when ripe, [5] with highly modified and constricted leaf tissue curled over the sporangia; they develop in autumn, persist erect over the winter and release the spores in early spring.
The male cones are solitary, ovoid, 30 cm long and 7.5 cm broad, with an apical spine and rhomboid sporophyll face. The species is unusual in that it contains a layer of fleshy material between the sarcotesta and the sclerotesta that is thought to aid the seed by providing it with a source of water. As cycad seeds have no dormancy, this would ...
In mosses, the gametophyte is the dominant generation, while the sporophytes consist of sporangium-bearing stalks growing from the tips of the gametophytes Sporophytes of moss during spring In flowering plants, the sporophyte comprises the whole multicellular body except the pollen and embryo sac
Hornworts are a group of non-vascular Embryophytes (land plants) constituting the division Anthocerotophyta (/ ˌ æ n θ oʊ ˌ s ɛ r ə ˈ t ɒ f ə t ə,-t ə ˈ f aɪ t ə /).The common name refers to the elongated horn-like structure, which is the sporophyte.
A female pinecone produces the megaspores of this heterosporic plant.A male pinecone produces the microspores of this heterosporic plant.Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants.
The term spore derives from the ancient Greek word σπορά spora, meaning "seed, sowing", related to σπόρος sporos, "sowing", and σπείρειν speirein, "to sow".
The nerves spring directly from the edge of the leaf rhachis and then run towards the plumage axis. The spars are hairy at least on young leaves. The hairs are colorless, branched or simple. The stomata for the gas exchange are found either only on the underside of the leaf, or in some species on both sides.
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