E-Flora BC: Electronic Atlas of the Flora of British Columbia

Isoetes tenella Léman
spiny-spore quillwort (bristle-like quillwort)
Isoetaceae (Quillwort family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #14105)

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Distribution of Isoetes tenella
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Species Information

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Perennial aquatic plants from a short 2-lobed rootstock.
Deciduous, flaccid, 5-25 cm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Lakes in the lowland to subalpine zones; infrequent throughout BC; circumpolar, N to AK, YT and NT, E to NF and S to NJ, MI, WI, MT, UT and CA; Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Isoetes tenella

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 0 0 0
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 6 6
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CWH(15)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Isoetes braunii Durieu
Isoetes echinospora Dur.
Isoetes echinospora subsp. asiatica (Makino) A. L÷ve
Isoetes echinospora subsp. muricata (Durieu) A. L÷ve & D. L÷ve
Isoetes echinospora var. asiatica Makino
Isoetes echinospora var. braunii (Durieu) Engelm.
Isoetes echinospora var. hesperia (C.F. Reed) A. L÷ve
Isoetes echinospora var. muricata (Durieu) Engelm.
Isoetes echinospora var. robusta Engelm.
Isoetes echinospora var. savilei B. Boivin
Isoetes muricata Durieu
Isoetes muricata var. braunii (Durieu) C.F. Reed
Isoetes muricata var. hesperia C.F. Reed
Isoetes setacea Lam. p.p.
Isoetes setacea subsp. muricata (Durieu) Holub

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References