MICROPHYLL

Microphyll

Microphyll is a type of plant leaf, which has traditionally been defined as "an appendage supplied by a single, unbranched vein". In the classical concept of a microphyll, this 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, are characterised by multiple veins. By this definition, the whisk ferns, clubmosses and horsetails have microphylls, as in all extant species there is only a single vascular trace in each leaf. Despite their name, microphylls are not always small: those of ...

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microphyll

Noun

  1. A leaf having a single unbranched vein, or a structure that is derived from such a leaf.
  2. A very small leaf


The above text is a snippet from Wiktionary: microphyll
and as such is available under the Creative Commons Attribution/Share-Alike License.

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