1-6 Isoëtaceae, quillwort family
These aquatic or amphibious plants are cosmopolitan, numbering about 150 species. Leaves are linear, pointed and straight or recurved, arising from a corm–like rhizome. Sporangia are produced in the hollow bases of the leaves, with outer leaves bearing megaspores and inner leaves bearing microspores. It is difficult to separate the species. A microscope is required to measure the spores and determine the adornments. Habitat and velum structure will aid in the determination. Photo use provided by Roger Lloyd.
Pteridophyte, native ferns, quillwort family, aquatic plants, fern allies
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