Callitriche stagnalis |
Callitriche trochlearis |
|
---|---|---|
callitriche des eau× stagnantes, pond water-starwort |
effluent water-starwort, water starwort, wheel fruit water-starwort |
|
Stem | and leaf scales present. |
and leaf scales present. |
Leaves | connate at base, obovate-spatulate to ± round, 4–9 × 1–4 mm, 1+-veined. |
connate at base, ± parallel-sided, 5.2–9.1 × 0.1–0.9 mm, 1+-veined. |
Inflorescences | bracts persistent. |
bracts persistent. |
Pedicels | 0–0.2 mm in fruit. |
0–0.5 mm in fruit. |
Flowers | solitary; styles erect; pollen yellow. |
usually 1 staminate and 1 pistillate in each axil; styles spreading; pollen yellow. |
Schizocarps | 1.2–1.8 × 1–1.7 mm, ± as long as wide; mericarps pale grayish brown, not swollen, winged throughout, wings straight, 0.1–0.5 mm wide. |
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. |
2n | = 10. |
= 40. |
Callitriche stagnalis |
Callitriche trochlearis |
|
Phenology | Flowering May–Oct. | Flowering Apr–Jul. |
Habitat | Standing water, stream margins, backwaters, ponds, pools, ditches. | Vernal and perennial pools, ditches. |
Elevation | 0–1500 m. (0–4900 ft.) | 0–2000 m. (0–6600 ft.) |
Distribution |
AL; CA; CT; MA; MD; ME; MO; MT; NJ; NY; OR; PA; VA; WA; WI; BC; NF; QC; SPM; Europe [Introduced in North America; introduced also in Australia]
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CA; OR
|
Discussion | Callitriche trochlearis occurs in northwestern and central-western California plus western Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 17, p. 54. | FNA vol. 17, p. 54. |
Parent taxa | Plantaginaceae > Callitriche | Plantaginaceae > Callitriche |
Sibling taxa | ||
Name authority | Scopoli: Fl. Carniol. ed. 2, 2: 251. (1772) | Fassett: Rhodora 53: 194. (1951) |
Web links |
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