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

Callitriche marginata Torr.
winged water-starwort
Plantaginaceae (Mare's-tail family)
(Previously in Callitrichaceae)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #9400)

E-Flora BC Static Map
Distribution of Callitriche marginata
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Aquatic or semi-aquatic perennial rooting in mud; stems matted, very slender, 5-10 cm long, leaf-bases joined by a tiny, winged ridge.
All opposite; submerged leaves linear, single-nerved, very slightly notched terminally; emergent leaves wider, incompletely 3-nerved.
Inflorescence of tiny, inconspicuous flowers borne without bracts or with tiny, brown, linear bracts; female flowers with distinct stalks, much longer than the fruits; styles sharply reflexed.
Achene-like, 4, each 1-seeded, conspicuously wing-margined, oval, irregularly pitted in a fine network.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Vernal pools in the lowland zone; rare, known only from S Vancouver Island and Mittlenatch Island; S to CA and MX.

Source: The Illustrated Flora of British Columbia


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

Callitriche longipedunculata Morong

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References