Nostoc commune Vaucher ex Bornet & Flahault (1888: 203)

Mcgregor, Glenn B., 2018, Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales, Phytotaxa 359 (1), pp. 448-450 : 448-450

Nostoc commune Vaucher ex Bornet & Flahault (1888: 203) Fig. 48 A–D.

Colonies macroscopic, gelatinous, irregularly spherical when immature, later irregularly flattened or wavy, up to 15 cm in diameter, olive-green to yellow-green or brown in colour with firm periderm. Filaments flexuous, densely entangled, sheaths yellow-brown, sometimes lamellated. Vegetative cells shortly barrel-shaped to spherical, isodiametric or longer or shorter than wide, 3.0–5.5 (–7) μm long × 4.0–4.3 (–6) μm wide. Heterocytes subspherical, sometimes in series, both terminal and intercalary, 5.5–8.4 μm long × 5.0–8.0 μm wide. Akinetes 4–7 μm long × 5–6 μm wide with smooth colourless cell wall.

Specimens examined:—Atkinson Dam, Mary R. at Gympie.

Other records:— Queensland: Marlong Ck at Marlong Caves, Mt Moffat, A.B. Cribb, 1986 (BRI 0701396), Surveyors Gully, Lake Broadwater, A.B. Cribb, 1986 (BRI 0701397), Sundown Natl Park, A.B. Cribb, 1985 (BRI 0701398), Big Bend area of Burdekin R., A.B. Cribb, 1981 (BRI 0701400), Darluca near Landsborough, A.B. Cribb, 1975 (BRI 0701405), Mt Cordeaux, A.B. Cribb, 1951 (BRI 0701412), Scawfell Is., A.B. Cribb, 1994 (BRI 0715673), Cribb (1971), Cribb (1984), SE Queensland, McLeod (1975); Victoria: Darling (1982), Watts (1887); New South Wales: cemetery, corner of Sydney Rd and Great Western Hwy, St Marys, S. Skinner, 2015 (NSW 848499), The Toll House, South Ck, Windsor, S. Skinner, 2015 (NSW 848501), White Gum Lookout, Coonamble, T.J. Entwisle, 2000 (NSW 627469), May (1970). South Australia: Mt Lofty, J.B. Cleland, 1922 (AD 54527). Western Australia: Northern end of Lake Coogee, Beeliar Regional Park, C. Prideaux, 2013 (PERTH 8560862), Warren Beach, Northcliffe, B. Muir, 1972 (PERTH 7051980).

Observations:—Subaerophytic species, commonly found growing on edge of streams and wetlands on wet loamy substrates.