Spirodela polyrhiza
Linnaea 13: 392 (1839)
Taxonomic status
Accepted
Occurrence status
Extinct
Origin
Native
Degree of establishment
Native
Roots (5–)10–13(–18). Thallus elliptic to obovate, (3–)5–10 mm long, 5–10 mm wide (length to width ratio 1–1.5), with 7–16 veins; dorsal surface yellow-green; ventral surface usually purplish.
Also NT, Qld, NSW. Alsmost cosmopolitan distribution in temperate to tropical regions. Very rare in Victoria, only known from 2 historical records from lagoons on the Upper Murray River near Towong and Biggara.
Created by: Andre
Messina,
11 Aug. 2014
Updated by: Val
Stajsic,
28 Mar. 2018
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