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"
ellipsoid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Robert R. Haynes +  and C. Barre Hellquist +
Withering +
attenuate;rounded +
6 cm60 mm <br />0.06 m <br /> (23 cm230 mm <br />0.23 m <br />) +
lanceolate +
1cm +  and 4.5cm +
lanceolate +
Calif. +  and Oreg. +
0–500 m +
u--shaped +
subsessile +  and long-pedicellate +
hypogynous +
compressed +
Streams and marshes +
decumbent +  and floating +
0 cm0 mm <br />0 m <br /> (70 cm700 mm <br />0.7 m <br />) +
submersed +  and emersed +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent +  and floating +
deciduous +
0.44 cm4.4 mm <br />0.0044 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
triangular +
Flowering and fruiting summer–fall. +
not radiating +
An Arrangement of British Plants (ed. 3) +
decumbent +  and floating +
baldwin1955a +, brown1946a +, heiser1948a +  and l1981a +
not septate +
persistent +
not sculptured +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Introduced +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Alisma lanceolatum +
species +
emersed +  and submersed +
bracteolate +  and branching +