A very short leaf, such as in a moss or clubmoss, with a single unbranched vein and no leaf gaps in the stele.
- Are the leaves microphylls as in lycopsids or megaphylls?
- The microphyll has only a single unbranched strand of vascular tissue, or vein, whereas megaphylls, found in other plants with leaves, have multiple veins, usually branching one or more times within the leaf.
- The only lineage that has survived is the horsetails, which are herbaceous and share characters with their extinct progenitors such as articulate stems with microphylls arranged in whorls.
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