Electronic Flora of South Australia Genus Fact Sheet

Genus HETEROCLADIA Decaisne 1842: 359 Description as for the tribe Heterocladieae.

Phylum Rhodophyta – Family Rhodomelaceae – Tribe Heterocladieae

Type species: Heterocladia australis Decaisne 1842: 359.

Taxonomic notes: Heterocladia has been recently monographed by Phillips, Choi, Saunders & Kraft (2000), who have shown that Trigenia Sonder (1845, p. 54) is not generically distinct and Heterocladia then contains 3 species.

References:

DECAISNE, J. (1842). Essais sur une classification des Algues et des Polypiers calcifères de Lamouroux. Ann. Sci. Nat., 2 Sér. Bot., 17, 297–380, Plates 14–17.

SONDER, O.G. (1845). Nova Algarum genera et species, quas in itinere ad oras occidentales Novae Hollandiae, collegit L. Preiss, Ph.Dr. Bot. Zeit. 3, 49–57.

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

Publication: Womersley, H.B.S. (24 February, 2003)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIID. Ceramiales – Delesseriaceae, Sarcomeniaceae, Rhodomelaceae
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIID 2003, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.

KEY TO SPECIES OF HETEROCLADIA

1. Axes terete to compressed, laterals irregular, much branched; lower part compressed, upper branches terete	I . H. australis
1. Axes terete, bearing short and dense or more-or-less clustered and umbellate laterals	2
2. Determinate laterals dense and irregular on axes, terete, usually 5–15 mm long and 300–500 µm in diameter	H. caudata
2. Laterals irregularly to umbellately arranged on axes, terete to slightly compressed, usually 2–8 cm long and 600–900 µm in diameter	H. umbellifera

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