Electronic Flora of South Australia Family Fact Sheet

FAMILY POSIDONIACEAE Lotsy, nom. cons.

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

Robust perennial marine herbs with stout rhizomes. RhLotnes irregularly monopodially branched, rooting at the nodes. Roots simple or branched. Leaves alternate with distinct blade and sheathing base. Tannin cells numerous. Inflorescence racemose, of several spike-like units. Flowers actinomorphic, bisexual, or sometimes male only; perianth absent; stamens 3 (rarely 4), sessile; pollen filiform; pollination hydrophilous; carpel one, 1-ovuled with a sessile ornate stigma. Fruit a drupe.

Taxonomic notes: Only one genus, Posidonia.

References: The Marine Benthic Flora of Southern Australia Part I

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (31 May, 1984)
The Marine Benthic Flora of Southern Australia
Part I
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