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Alisma lanceolatum With.
Family Alismataceae
Alisma lanceolatum With. APNI*

Description: Erect emergent aquatic perennial to c. 1 m high.

Petioles to c. 80 cm long, flattened on one side and with small wings at the base; lamina lanceolate, acute, tapering gradually into the petiole, to 20 cm long and 4 cm wide, with up to 7 prominent parallel veins connected by numerous transverse veins.

Inflorescence to 60 cm long and 40 cm wide. Flowers c. 10 mm diam. Sepals to 2 mm long. Petals c. 4 mm long, white or pink. Carpels c. 20, free; style curved in lower part.

Nutlets 2–2.5 mm long, falling singly.

Flowering: summer.

Distribution and occurrence: Spreading and becoming a serious weed of rice crops; south from Coleambally irrigation area. Native of Eur., Afr. & Asia.
NSW subdivisions: *SWP
Other Australian states: *Vic. *S.A.
AVH map***

Text by S. W. L. Jacobs
Taxon concept: Flora of NSW 4 (1993)

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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