megaphyll


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Related to megaphyll: sporophyll

megaphyll

(ˈmɛɡəfɪl)
n
(Botany) botany the relatively large type of leaf produced by ferns and seed plants. Compare microphyll
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The leaf size spectra was dominated by microphyll with 31 (39.74%) species followed by mesophyll (17 sp., 21.79%), nanophyll 14 (17.94%), macrophyll 6 (7.69%), leptophyll 5 (6.41%), megaphyll 2 (2.56%) and one (1.28%) species was aphyllous (Table 2, Fig.
Fleming, "Zimmermann's telome theory of megaphyll leaf evolution: a molecular and cellular critique," Current Opinion in Plant Biology, vol.
Plants were divided in to, (A) leptophyll, (B) nanophyll (C) microphyll (D) mesophyll and (E) megaphyll. For this estimation in the area Raunkiaer (1934) diagram was used.
This clade diverged into two lineages: the Prorepens clade, which remained of small stature and tended to become dioecious, and the "Megaphyll" clade, which tended to increase its leaf size and rank (Figs.
Anomalous branching patterns in some fossil Filicales: Implications in the evolution of the megaphyll and the lateral branch, habit and growth pattern.
Using Raunkiaer's scale for the classification of leaf size, leptophylls are leaves have a surface area less than 0.04 sq in (25 sq mm) (the term is also used for the plants that bear them); nanophylls are leaves between 0.04 and 0.4 sq in (26 and 225 sq mm); microphylls are leaves between 0.4 and 28 sq in (226 and 18,225 sq mm); macrophylls are from 28 and 254 sq in (18,226 and 164,025 sq mm); and megaphylls are leaves that have a surface area greater than 254 sq in (164,026 sq mm).