Callitriche trochlearis |
Callitriche marginata |
|
---|---|---|
effluent water-starwort, water starwort, wheel fruit water-starwort |
wing water-starwort |
|
Stem | and leaf scales present. |
and leaf scales present. |
Leaves | connate at base, ± parallel-sided, 5.2–9.1 × 0.1–0.9 mm, 1+-veined. |
connate at base, narrowly spatulate, 3.5–7.1(–7.2) × 0.7–1.4 mm, 1+-veined. |
Inflorescences | bracts persistent. |
bracts absent. |
Pedicels | 0–0.5 mm in fruit. |
1.2–3.3 mm in fruit. |
Flowers | usually 1 staminate and 1 pistillate in each axil; styles spreading; pollen yellow. |
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 | 1–1.2 × 1.1–1.3 mm, ± as long as wide; mericarps black, not swollen, evenly winged throughout, wings straight, 0.05–0.1 mm wide. |
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 | = 40. |
= 20. |
Callitriche trochlearis |
Callitriche marginata |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Aug. |
Habitat | Vernal and perennial pools, ditches. | Lakes, reservoirs, floodplain pools, streams, vernal pools. |
Elevation | 0–2000 m. (0–6600 ft.) | 0–1000 m. (0–3300 ft.) |
Distribution |
CA; OR
|
CA; OR; BC; Mexico (Baja California)
|
Discussion | Callitriche trochlearis occurs in northwestern and central-western California plus western Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 54. | FNA vol. 17, p. 52. |
Parent taxa | Plantaginaceae > Callitriche | Plantaginaceae > Callitriche |
Sibling taxa | ||
Synonyms | C. sepulta | |
Name authority | Fassett: Rhodora 53: 194. (1951) | Torrey: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 135. (1857) |
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