573 Non-marine algae of Australia: 1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria) Stephen Skinner and Timothy J. Entwisle Abstract Skinner, S. and Entwisle, T.J. (Royal Botanic Gardens Sydney, Mrs Macquaries Road, Sydney NSW 2000, Australia. e-mail:
[email protected]) 2001. Non-marine algae of Australia: 1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria). Telopea 9(3): 573–599. Non-planktonic freshwater and terrestrial blue-green algae (Cyanobacteria) large enough to be noticeable even to casual observers, are frequently encountered in Australia, but appear only occasionally in the literature. Sixteen species of gelatinous colonial blue-green algae (Cyanobacteria) from Australia, are documented here. Two species — Nostoc borzioides and Rivularia concentrica — are new to science, and nine (Aphanothece caldariorum Richter, A. pallida (Kützing) Rabenhorst; Nostochopsis lobatus H.C. Wood ex Bornet & Flahault; Rivularia aquatica de Wilde; Gloeotrichia pilgeri Schmidle; Dichothrix gypsophila (Kützing) Bornet & Flahault; Nostoc flagelliforme Berkley & Curtis; Nostoc pruniforme (L.) C. Agardh ex Bornet & Flahault; Nostoc gelatinosum Schousboe in Bornet) are newly recorded from Australia. The others are Rivularia beccariana; Cylindrospermum licheniforme; Cylindrospermum stagnale; Nostoc commune and Nostoc verrucosum. Keys to the genera and species occurring in Australia are provided. Introduction This is the first of an occasional series of papers documenting new algal records and new taxa from non-marine habitats in Australia. The information is floristic rather than monographic, responding to an urgent need for information about the diversity of algae in freshwater and terrestrial habitats in Australia. The descriptions and illustrations are from Australian material, while protologues or authoratitive oversees descriptions have been consulted.