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

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• Legacy Map

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.