Alisma lanceolatum

Herbs, to 70 cm. Leaves emersed, petiolate; blade lanceolate, 6–23 × 1–4.5 cm. Inflorescences to 70 cm. Flowers chasmogamous; sepals 1.6–3 mm; petals purplish pink, 4.4–6.5 mm, margins ± erose, apex acuminate; anthers ellipsoid, 0.6–1.1 mm; style ± curved, 0.4–0.6 mm, equaling ovary length. Fruiting heads 4–8 mm diam; achenes obovoid, 2–2.9 mm, with 1–2 abaxial grooves, beak erect. 2n = 26, 28 (Eurasian material).

Phenology: Flowering and fruiting summer–fall.
Habitat: Streams and marshes
Elevation: 0–500 m

Distribution

• Generated Map
• Legacy Map

Introduced; Calif., Oreg.

Discussion

Selected References

Baldwin, J. T. and B. M. Speese. 1955. Chromosomes of taxa of the Alismataceae in the range of Gray’s Manual. Amer. J. Bot. 42: 406--411.

Brown, W. V. 1946. Cytological studies in the Alismaceae. Bot. Gaz. 108: 262--267. should that be Alismataceae??---ed.

Heiser, C. B. and T. W. Whitaker. 1948. Chromosome number, polyploidy and growth habit in California weeds. Amer. J. Bot. 35: 179--186.

Löve, Á. and D. Löve. 1981. In: IOPB chromosome number reports LXXII. Taxon 30: 694--708.

Lower Taxa

None.