Plantae > Tracheophyta > Lycopodiopsida > Isoetales

Isoetales (Quillwort)

Wikipedia Abstract

Isoetales, formerly also written Isoëtales, is an order of plants in the class Isoetopsida. There are about 140-150 living species, all classified in the genus Isoetes (quillworts), with a cosmopolitan distribution but often scarce to rare. Living species are mostly aquatic or semi-aquatic in clear ponds and slow-moving streams. Each leaf is slender and broadens downward to a swollen base up to 5 mm wide where the leaves attach in clusters to a bulb-like, underground corm characteristic of most quillwort species. This swollen base also contains male and female sporangia, protected by a thin, transparent covering (velum), which is used diagnostically to help identify quillwort species. Quillwort species are very difficult to distinguish by general appearance. The best way to identify them i
View Wikipedia Record: Isoetales

Family

Chaloneriaceae (1)
Isoetaceae (Quillwort) (230)   (19)
Nathorstianaceae (1)
Pleuromeiaceae (9)

Genus

Isoetodendron (1)
Lepacyclotes (3)
Minerisporites (6)
Porostrobus (1)
Tomiodendron (2)
Wexfordia (1)

(...) = Species count
(...) = Endangered count
(...) = Invasive count

External References

Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0