Callitriche palustris |
Callitriche brutia |
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callitriche des marais, spring water-starwort, vernal water-starwort |
narrow-leaf water-starwort |
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Stem | and leaf scales present. |
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Leaves | connate at base, ± linear, tapering strongly from near base or spatulate, 2.5–9 × 0.3–5 mm, 1+-veined. |
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Inflorescences | bracts caducous, sometimes persistent. |
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Pedicels | 0–0.2 mm in fruit. |
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Flowers | usually 1 staminate and 1 pistillate in 1 axil opposed by 1 pistillate; styles erect or spreading; pollen yellow. |
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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. |
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2n | = 20. |
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Callitriche palustris |
Callitriche brutia |
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Phenology | Flowering May–Oct. | |
Habitat | Fast-flowing rivers and streams, backwaters, ditches, swamps, Sphagnum bogs, lakes, ponds, springs, seepages. | |
Elevation | 0–3600 m. (0–11800 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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OR; WA; BC; Europe; Africa [Introduced to Australia] |
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.) |
Varieties 2 (1 in the flora). Variety brutia is known from Europe and Africa plus is introduced to Australia; it differs from var. hamulata in chromosome number (2n = 28) and pedicellate fruit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 53. | FNA vol. 17, p. 50. |
Parent taxa | Plantaginaceae > Callitriche | Plantaginaceae > Callitriche |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | C. palustris var. stenocarpa, C. palustris var. verna, C. stenocarpa, C. verna | |
Name authority | Linnaeus: Sp. Pl. 2: 969. (1753) | Petagna: Inst. Bot. 2: 10. (1787) |
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