Elatine triandra

Schkuhr

Bot. Handb. 1: 345, plate 109b, fig. 2. 1789–1791.

Common names: Three-stamened waterwort
IntroducedIllustrated
Synonyms: Elatine callitrichoides (Nylander) Kauffmann E. triandra var. callitrichoides Nylander
Treatment appears in FNA Volume 12. Treatment on page 351. Mentioned on page 350, 352.

Herbs, submersed, 2–10 cm. Stems prostrate, highly branched. Leaves light green to green; stipules triangular or ovate-lanceolate, 0.7–1 mm, margins dentate, apex acute or obtuse; petiole 0–3 mm; blade linear, lanceolate, or narrowly oblong, 3–10 × 1.5–3.5 mm, base attenuate, apex acute or obtuse. Pedicels 0.3–0.4 mm, erect. Flowers: sepals (2–)3(–4), usually 1 reduced, ovate, 0.5(–0.7) × 0.2–0.4 mm; petals 3, white or reddish, widely ovate or elliptic, 0.6–1.2 × 0.5 mm; stamens 3; styles 3. Capsules compressed-globose, 3-locular, 1.2–1.7[–2] mm diam. Seeds 10–25 per locule, oblong, straight or slightly curved, 0.4–0.5 × 0.1–0.2 mm; pits angular-hexagonal, length 2–3 times width, in 6–8 rows, 16–25 per row. 2n = ca. 40.


Phenology: Flowering summer–early fall.
Habitat: Shores, pools.
Elevation: 0–1100(–2500) m.

Distribution

V12 610-distribution-map.jpg

Introduced; Alta., N.W.T., Ont., Sask., Ala., Ariz., Calif., Colo., Conn., Ga., La., Maine, Mass., Minn., Nebr., Nev., N.J., N.Y., N.C., N.Dak., Okla., Pa., S.C., Tex., Utah, Va., Wis., e, se Asia, also introduced in South America (Brazil), Europe, Africa, Australia.

Discussion

Elatine triandra is a popular aquarium plant. Reports of E. triandra from Yukon were based on misidentification of Callitriche hermaphroditica (B. Bennett et al. 2010). Elatine triandra is a common weed in rice fields of south and southeast Asia (K. Moody 1989), thus rice farming or aquarium trade may have been responsible for its introduction.

Selected References

None.

Lower Taxa

None.
... more about "Elatine triandra"
Hamid Razifard +, Gordon C. Tucker +  and Donald H. Les +
Schkuhr +
Three-stamened waterwort +
Alta. +, N.W.T. +, Ont. +, Sask. +, Ala. +, Ariz. +, Calif. +, Colo. +, Conn. +, Ga. +, La. +, Maine +, Mass. +, Minn. +, Nebr. +, Nev. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Okla. +, Pa. +, S.C. +, Tex. +, Utah +, Va. +, Wis. +, e +, se Asia +, also introduced in South America (Brazil) +, Europe +, Africa +  and Australia. +
0–1100(–2500) m. +
Shores, pools. +
Flowering summer–early fall. +
Bot. Handb. +
Introduced +  and Illustrated +
Elatine callitrichoides +  and E. triandra var. callitrichoides +
Elatine triandra +
species +