[Aquatic Plants of the Cascade Mountains of Oregon and Washington]

The Quillwort Family in the Cascade Mountains of Oregon and Washington

The Genus Isoetaceae

Habitat of Western Quillwort: Isoetes occidentalis (Synonyms: Isoetes flettii, Isoetes lacustris, Isoetes lacustris var. paupercula, Isoetes paupercula, Isoetes piperi)

Western quillwort: Isoetes occidentalis

Unidentified Quillworts - Can you help verify the identity of these quillworts?

Bolander's Quillwort: Isoetes bolanderi (Synonyms: Isoetes bolanderi var. bolanderi, Isoetes bolanderi var. parryi, Isoetes bolanderi var. pygmaea, Isoetes californica, Isoetes pygmaea) - Washington State Review 1 status.

Howell's Quillwort: Isoetes howellii (Synonyms: Isoetes melanopoda, Isoetes melanopoda var. californica, Isoetes nuda, Isoetes underwoodii) - Washington State Review 1 status.

Midget Quillwort: Isoetes minima (Synonym: Isoetes howellii var. minima) - Washington State Review 1 status. Plants of seasonally wet swales or depressions.

Nuttall's Quillwort: Isoetes nuttallii (Synonyms: (Isoetes nuttallii var. nuttallii, Isoetes opaca, Isoetes suksdorfii) - Washington State Sensitive status. Also rare in British Columbia. Plants of seasonally wet ground, seepages, temporary streams and mud near vernal pools.

Western Quillwort: Isoetes occidentalis (Synonyms: Isoetes flettii, Isoetes lacustris, Isoetes lacustris var. paupercula, Isoetes paupercula, Isoetes piperi)

Bristle-like Quillwort, Spiny-spored Quillwort: Isoetes tenella (Synonyms: Isoetes braunii, Isoetes echinospora, Isoetes echinospora var. braunii, Isoetes echinospora var. muricata, Isoetes muricata, Isoetes setacea)


Paul Slichter