Alisma lanceolatum

Withering
An Arrangement of British Plants (ed. 3) 2: 362. 1796.
Introduced
Treatment appears in FNA Volume 22.

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

V22 35-distribution-map.jpg

Introduced; Calif., Oreg.

Discussion

Lower Taxa

None.

... more about "Alisma lanceolatum"
Robert R. Haynes +  and C. Barre Hellquist +
Withering +
Calif. +  and Oreg. +
0–500 m +
Streams and marshes +
Flowering and fruiting summer–fall. +
An Arrangement of British Plants (ed. 3) +
baldwin1955a +, brown1946a +, heiser1948a +  and l1981a +
Introduced +
Alisma lanceolatum +
species +