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Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Order Ceramiales – Family Ceramiaceae – Tribe Dasyphileae
Thallus erect, 5–20 cm high, consistently alternately distichously branched, axes and branches terete, densely corticated below by rhizoids from basal cells of whorl-branchlets. Apical cells of axes dividing transversely or slightly obliquely, subapical cells developing whorls of 6 whorl-branchlets in largely alternating sequence, whorl-branchlets basally usually trichotomous and laterally branched above; gland cells absent. Cells uninucleate.
Reproduction: Gametophytes dioecious. Procarps borne on the basal (=supporting) cell of young whorl-branchlets, with a 4-celled carpogonial branch; the auxiliary cell divides to form a lower cell pit-connected to the axial cell and an upper gonimoblast cell which develops successive groups of carposporangia, each with a long stalk cell and surrounded by whorl-branchlets from below but not a special involucre. Spermatangia are borne on short branches on outer cells of whorl-branchlets.
Tetrasporangia occur on outer cells of whorl-branchlets, terminal on short pedicels, tetrahedrally divided.
Type species: D. preissii Sonder 1845: 53.
Taxonomic notes: A genus of some 3 species, the type, D. cryptocarpa (Holmes) Schmitz (1896, p. 8) from South Africa, and D. plumarioides Yendo (1920, p. 7) from the western tropical Pacific (see Wollaston 1977, p. 447 and Kraft & Wilson 1997, p. 138).
References:
KRAFT, G.T. & WILSON, S.M. (1997). The taxonomy of Dasyphila plumarioides (Ceramiaceae, Rhodophyta). Phycologia 36, 138–149.
SCHMITZ, F. (1896). Kleinere beitrage zur kenntniss der Florideen. Nuova Notarisia, Padova 7, 1–22.
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.
YENDO, K. (1920). Novae Algae Japoniae. I–III. Bot. mag. Tokyo 34, 1–12.
The Marine Benthic Flora of Southern Australia Part IIIC complete list of references.
Publication:
Womersley, H.B.S. (24 December, 1998)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIC. Ceramiales – Ceramiaceae, Dasyaceae
©State Herbarium of South Australia, Government of South Australia
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