Isoetes histrix

Isoetes histrix, the land quillwort,^[1] is an aquatic pteridophyte native to the Mediterranean region, northwestern Africa, and the coasts of western Europe northwest to Cornwall. It occurs mainly in temporarily wet habitats, otherwise called vernal pools.

Isoetes histrix
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Lycophytes
Class:	Lycopodiopsida
Order:	Isoetales
Family:	Isoetaceae
Genus:	Isoetes
Species:	I. histrix
Binomial name
Isoetes histrix Bory

The leaves are 3–8 cm long, and summer-deciduous. It differs from Isoetes durieui by its large black scales between the leaves, though these are not always present, and a surface of megaspores with tubercles, whereas I. durieui has a network of ridges.