Isoetes Linnaeus 1753
Creators: name: Liu, Chenlai
name: Yu, Xiaolei
name: Song, Xiaoli
name: Shao, Jingjing
name: Chen, Yuchu
name: Liu, Xing
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Lycopodiopsida
Isoetales
Isoetaceae
Isoetes

description: Key to the species of the genus Isoetes in China
1. Corm 3-lobed .....................................................................................................................................................................................2
-. Corm 2-lobed .................................................................................................................................................................. I. longpingii
2. velum present......................................................................................................................................................................................3
-. velum absent.......................................................................................................................................................................................6
3. Megaspores 207–340 μm ...................................................................................................................................................................4
-. Megaspores 340–450 μm ...................................................................................................................................................................5
4. Megaspores 207–280 μm ......................................................................................................................................... I. shangrilaensis
-. Megaspores 280–340 μm............................................................................................................................................... I. taiwanensis
5. Megaspore ornamentation reticulate; microspore ornamentation tuberculate-echinate.................................................... I. orientalis
-. Megaspore ornamentation cristate-reticulate; microspore ornamentation levigate-granulate ..................................... I. yunguiensis
6. Leaves 2–9 cm long; growth in high elevation ............................................................................................................... I. hypsophila
-. Leaves longer than 9 cm; distuibuted in lowland sites.......................................................................................................................7
7. Megaspore ornamentation echinate or critstate or echinate-critstate .................................................................................................8
-. Megaspore ornamentation tuberculate or rugulate ............................................................................................................................9
8. Megaspore ornamentation echinate or critstate................................................................................................................................10
-. Megaspore ornamentation echinate-critstate................................................................................................................... I. baodongii
9. Megaspore ornamentation tuberculate ......................................................................................................................... I. changleensis
-. Megaspore ornamentation rugulate ............................................................................................................................... I. yuhangensis
10. Megaspore ornamentation echinate..................................................................................................................................... I. sinensis
-. Megaspore ornamentation critstate...................................................................................................................................... I. xiangfei
description: Published as part of Liu, Chenlai, Yu, Xiaolei, Song, Xiaoli, Shao, Jingjing, Chen, Yuchu & Liu, Xing, 2024, Two new diploid species of Isoetes (Isoetaceae: Lycopodiopsida) from Southeastern China based on morphological and molecular evidence, pp. 37-49 in Phytotaxa 642 (1) on page 44, DOI: 10.11646/phytotaxa.642.1.3, http://zenodo.org/record/13214145