Callitriche marginata


in War Department [U.S.], Pacif. Railr. Rep. 4(5): 135. 1857.

Common names: Winged water-starwort
Synonyms: Callitriche sepulta S. Watson
Treatment appears in FNA Volume 17. Treatment on page 52. Mentioned on page 50, 53.

Leaves connate at base, narrowly spatulate, 3.5–7.1(–7.2) × 0.7–1.4 mm, 1+-veined. Stem and leaf scales present. Inflorescences: bracts absent. Pedicels 1.2–3.3 mm in fruit. Flowers usually 1 pistillate and 1 staminate in each axil, sometimes 1 or 2 axils with 2 pistillate, rarely solitary; styles sharply deflexed; pollen yellow. Schizocarps 0.7–0.9 × 1.1–1.4 mm, shorter than wide; mericarps maroon or white, not swollen, winged throughout, wings straight, 0.1–0.2 mm wide. 2n = 20.

Phenology: Flowering Apr–Aug.
Habitat: Lakes, reservoirs, floodplain pools, streams, vernal pools.
Elevation: 0–1000 m.


B.C., Calif., Oreg., Mexico (Baja California).


Callitriche marginata is known throughout the California floristic province northward to southeastern British Columbia. There are no records from Washington State and British Columbia; occurrences may be remnants of a previously more widespread population (M. Miller 2001).

Lower Taxa

... more about "Callitriche marginata"
Richard V. Lansdown +
Torrey +
Winged water-starwort +
B.C. +, Calif. +, Oreg. +  and Mexico (Baja California). +
0–1000 m. +
Lakes, reservoirs, floodplain pools, streams, vernal pools. +
Flowering Apr–Aug. +
in War Department [U.S.], Pacif. Railr. Rep. +
miller2001c +
Callitriche sepulta +
Callitriche marginata +
Callitriche +
species +