Isoetales
plant order
Learn about this topic in these articles:
annotated classification
- In lycophyte: Annotated classification
Order Isoetales (quillworts) Living and extinct plants with secondary growth; heterosporous, with endosporic gametophytes; Isoetites is an extinct genus; for many years the species of Isoetes were difficult to distinguish, but, since the discovery that frequent hybridization was obscuring
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