Callitriche palustris |
Callitriche longipedunculata |
|
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callitriche des marais, spring water-starwort, vernal water-starwort |
longstock water-starwort |
|
Stem | and leaf scales present. |
and leaf scales present. |
Leaves | connate at base, ± linear, tapering strongly from near base or spatulate, 2.5–9 × 0.3–5 mm, 1+-veined. |
connate at base, spatulate, 2.8–5 × 1.8–3.3 mm, 1+-veined. |
Inflorescences | bracts caducous, sometimes persistent. |
bracts caducous. |
Pedicels | 0–0.2 mm in fruit. |
0–25 mm in fruit. |
Flowers | usually 1 staminate and 1 pistillate in 1 axil opposed by 1 pistillate; styles erect or spreading; pollen yellow. |
usually 1 staminate and 1 pistillate in 1 axil opposed by 1(+) pistillate; styles erect and spreading to recurved; pollen yellow. |
Schizocarps | obovoid, usually widest distal to middle, 0.8–1.4 × 0.6–1.4 mm, longer than wide, sometimes as long as wide; mericarps black, not swollen, not winged, winged only at apex, or winged throughout but widest at apex, wings straight, 0.03–0.1 mm wide. |
0.9–1.4 × 0.8–1.2 mm, as long as or longer than wide; mericarps black, not swollen, evenly winged throughout, wings straight, 0.03–0.1 mm wide. |
2n | = 20. |
|
Callitriche palustris |
Callitriche longipedunculata |
|
Phenology | Flowering May–Oct. | Flowering Mar–May. |
Habitat | Fast-flowing rivers and streams, backwaters, ditches, swamps, Sphagnum bogs, lakes, ponds, springs, seepages. | Vernal pools. |
Elevation | 0–3600 m. (0–11800 ft.) | 0–700 m. (0–2300 ft.) |
Distribution |
AK; AZ; CA; CO; CT; DE; IA; ID; IL; MA; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NV; NY; OR; PA; RI; SD; TX; UT; VT; WA; WI; WY; AB; BC; MB; NB; NF; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; Mexico (Chihuahua, San Luis Potosí); Eurasia [Introduced in Australia]
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CA |
Discussion | Callitriche palustris has been included on the Composite List of Weeds maintained by the Weed Science Society of America (http://wssa.net/wssa/weed/composite-list-of-weeds/); its inclusion seems unwarranted. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Callitriche longipedunculata is known from most of California, including the Inner North Coast Ranges, Cascade Range Foothills, Great Central Valley, San Francisco Bay Area, and western Pensisular Ranges (R. V. Lansdown and R. E. Preston, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=16691). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 53. | FNA vol. 17, p. 52. |
Parent taxa | Plantaginaceae > Callitriche | Plantaginaceae > Callitriche |
Sibling taxa | ||
Synonyms | C. palustris var. stenocarpa, C. palustris var. verna, C. stenocarpa, C. verna | C. marginata var. longipedunculata |
Name authority | Linnaeus: Sp. Pl. 2: 969. (1753) | Morong: Bull. Torrey Bot. Club 18: 236. (1891) |
Web links |
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