Citation: L., Sp. Pl. 127 (1753).

Synonymy: Coleogeton pectinatus, Stuckenia pectinata

Common name: Fennel pondweed, sago pondweed.

Description:
Perennial, with stems to 3 m long; leaves all submerged, green or brownish, translucent, entire, narrowly linear, 1.5-15 cm long; stipular sheath adnate to the base of the leaf (the basal part forming a leaf sheath, the distal part forming a ligule).

Spike (in fruit) 1.5-4 (rarely to 6) cm long.

Fruiting carpel 2.4-4 mm long, with a very short beak, smooth but usually with 3 obscure dorsal keels.

Published illustration: Sainty & Jacobs (1981) Waterplants of New South Wales, pp. 374, 375.

Distribution:  S.Aust.: LE, EA, EP, NL, MU, SL, KI, SE.   All States except the N.T.   Cosmopolitan, occurring in fresh to saline still or flowing water to 3 m deep. Conservation status: native Flowering time: have been recorded from Sept. — May.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: Distinguishable from Ruppia maritima by the stipules.

Author: Not yet available