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Electronic Flora of South Australia Family Fact Sheet
Phylum Chlorophyta – Order Ulvales
Thallus tubular, membranous, or of biseriate filaments, attached or free floating. Cells with parietal, laminate or cup-shaped chloroplasts with 1–4 pyrenoids.
Life history diplohaplontic and isomorphic, but some taxa asexual.
References: The Marine Benthic Flora of Southern Australia Part I
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
KEY TO GENERA OF ULVACEAE
1. Thallus of uniseriate or usually biseriate filaments, loose-lying as entangled masses | PERCURSARIA |
1. Thallus tubular or membranous, usually basally attached | 2 |
2. Thallus membranous, monostromatic or distromatic | 3 |
2. Thallus tubular and hollow, at least near the base and margins | 4 |
3. Thallus monostromatic throughout | ULVARIA |
3. Thallus distromatic throughout, often with rhizoids between the cell layers near the thallus base | ULVA |
4. Thallus with a basal, cellular attachment disc, without rhizoids, cells of thallus less than 10 µm across in surface view, chloroplast stellate with a single central pyrenoid | BLIDINGIA |
4. Thallus basally attached by rhizoids from the lower cells, thallus cells usually | ENTEROMORPHA |
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