Electronic Flora of South Australia Genus Fact Sheet

Genus HETEROZOSTERA (Setchell) den Hartog 1970: 114. "Garweed", "Eelgrass".

Phylum Magnoliophyta – Subphylum Seagrasses – Class Liliopsida – Subclass Alismatidae – Order Potamogetonales – Family Zosteraceae

Monoecious; perennials with extensively branched rhizomes. Vegetative shoots erect, unbranched; internodes of both rhizomes and erect stems in transverse section showing 4–12 vascular bundles in the outer cortex in addition to the central vascular bundle. Leaves alternate, distichous; sheath open, ligulate, auriculate; blade linear, deciduous, leaving a senescent sheath at the node. Squamules in pairs. Fertile shoots sympodially branched, forming cymose inflorescences; spathe stalked, inflated, enclosing the stalked spadix. Male and female flowers arranged alternately in 2 longitudinal rows on the spadix; retinacules present.

Type and only species: H. tasmanica (Martens ex Ascherson) den Hartog.


DEN HARTOG, C. (1970). The seagrasses of the World. Verh. k. ned. Akad. Wet. Afd. Natuurk., ser. 2, 59(1), 1–275 (-1–31 Plates).

The Marine Benthic Flora of Southern Australia Part I complete list of references.

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (31 May, 1984)
The Marine Benthic Flora of Southern Australia
Part I
©Board of the Botanic Gardens and State Herbarium, Government of South Australia

Disclaimer Copyright Disclaimer Email Contact:
State Herbarium of South Australia
Government of South Australia Government of South Australia Department for Environment and Water