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Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Class Florideophyceae – Order Rhodymeniales – Family Champiaceae
Thallus erect, much branched, branches terete, with regular hollow segments throughout with transverse monostromatic diaphragms, slightly constricted at diaphragms; holdfast discoid, with or without a perennial base to the axes. Structure multiaxial, with peripheral and often central longitudinal filaments bearing secretory cells, developing outwardly in young parts a single layered cortex which becomes multilayered in older branches, and inwardly the monostromatic diaphragms.
Reproduction: Gametangial thalli dioecious; procarpic. Carpogonial branches on cortical (supporting) cells, 4-celled, with two 2-celled auxiliary cell branches; carposporophytes with a basal fusion cell bearing large, wedge-shaped carposporangia directly. Basal nutritive tissue absent or slight. Cystocarps external, pericarp a few cells thick, inner cells stellate and separating, non-ostiolate. Spermatangia in superficial sori, cut off from outer cortical cells via initials.
Tetrasporangia large, scattered, transformed from primary cortical cells, tetrahedrally divided.
Life history triphasic, with isomorphic gametophytes and tetrasporophytes.
Type species: C. kaliformis (Goodenough & Woodward) Greville [= C. verticillata (Lightfoot) Bliding 1928: 69] .
Taxonomic notes: A genus of about 10 species, with one species on southern Australian coasts.
References:
BLIDING, C. (1928). Studien über die Florideenordnung Rhodyméniales. Acta Univ. lund. N.F. Avd. 2, 24(3), 1–73.
HOOKER, W.J. (1833). "The British Flora". Edn 4, Vol. 2. (Longman et al.: London.)
The Marine Benthic Flora of Southern Australia Part IIIB complete list of references.
Publication:
Womersley, H.B.S. (28 June, 1996)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIB. Gracilarialse, Rhodymeniales, Corallinales and Bonnemaisoniales
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIIB 1996, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.
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