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Hypoglossum caloglossoides M.J.Wynne & Kraft

Reference
Brit.Phycol.J. 20:9-13, 15, Figs 1-19 (1985)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus decumbent, spreading to 2–3 cm in extent, with regularly constricted blades attached at each constriction by isolated or aggregated rhizoids or pad-like holdfasts; each constriction also the origin of 1–several indeterminate blades, each capable of elongation and reattachment. Blades lanceolate to oblanceolate, 6–12 mm long, 50–100 µm wide. Structure with all cells of second-order rows bearing third-order rows.

Reproduction. Reproductive structures on erect non-constricted blades that remain unattached. Spermatangia and tetrasporangial in sori. Tetrasporangia developing from cells of the medullary layer and from cortical cells.

Distribution. Known from Lord Howe Island, northern Australia, Samoa, the Marshall Islands, Fiji, the Hawaiian Islands and Bermuda. Probably widespread in tropical seas.

[After J.M. Huisman & S.-M. Lin in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 466 (2018)]