This article is about the classification based on leaf vasculature. For the terms "Microphyll" and "Megaphyll" as classifications of leaf size, see Leaf size.
In plant anatomy and evolution a microphyll (or lycophyll) is a type of plant leaf with one single, unbranched leaf vein.[1] Plants with microphyll leaves occur early in the fossil record, and few such plants exist today. In the classical concept of a microphyll, the leaf vein emerges from the protostele without leaving a leaf gap. Leaf gaps are small areas above the node of some leaves where there is no vascular tissue, as it has all been diverted to the leaf. Megaphylls, in contrast, have multiple veins within the leaf and leaf gaps above them in the stem.
^Kaplan, D.R. (2001). "The Science of Plant Morphology: Definition, History, and Role in Modern Biology". American Journal of Botany. 88 (10): 1711–1741. doi:10.2307/3558347. JSTOR 3558347. PMID 21669604.
and 17 Related for: Microphylls and megaphylls information
instead that both microphyllsandmegaphylls originated by the reduction; microphylls by reduction of a single telome branch, andmegaphylls by evolution from...
sporangia. Both microphyllsandmegaphylls can be sporophylls. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either...
stem and leaves. The root system is always adventitious. The stem is either underground or aerial. The leaves may be microphylls or megaphylls. Their...
doi:10.1016/j.pbi.2006.11.006, PMID 17141552 Tomescu, A. (2009), "Megaphylls, microphyllsand the evolution of leaf development", Trends in Plant Science,...
lycophyte species have microphylls, leaves that have only a single vascular trace (vein), rather than the much more complex megaphylls of other vascular plants...
leaves. In the only extant genus Equisetum, these are small leaves (microphylls) with a singular vascular trace, fused into a sheath at each stem node...
əfaɪtə/; from Ancient Greek τραχεῖα ἀρτηρία (trakheîa artēría) 'windpipe', and φυτά (phutá) 'plants'), form a large group of land plants (c. 300,000 accepted...
megaspores and microspores. Unusual for the lycopods, which nearly always have microphylls with a single unbranched vein, the microphylls of a few Selaginella...
shapes, sizes, textures and colors. The broad, flat leaves with complex venation of flowering plants are known as megaphyllsand the species that bear them...
reduction of megaphylls. The leaves of horsetails are arranged in whorls fused into nodal sheaths. The stems are usually green and photosynthetic, and are distinctive...
types: microphylls, which lack complex venation and may have originated as spiny outgrowths known as enations, andmegaphylls, which are large and have...
water and nutrients and in having life cycles in which the branched sporophyte is the dominant phase. Ferns have complex leaves called megaphylls, that...
1038/2031082b0. S2CID 4292879.. Tomescu, Alexandru M.F. (2009). "Megaphylls, microphyllsand the evolution of leaf development". Trends in Plant Science....
have secondarily reduced megaphylls resembling microphylls.) Both the cladogram derived from Kenrick and Crane's studies and its implications for the...
size of plants can be described using the terms megaphyll, macrophyll, mesophyll, microphyll, nanophyll and leptophyll (in descending order) in a classification...
pl.: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the term division has been used instead...
are classified into two types - microphylls, that lack complex venation patterns andmegaphylls, that are large and with a complex venation. It has been...
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