Nostoc sphaericum Vaucher ex Bornet & Flahault (1886: 208)

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

publication ID

https://doi.org/ 10.11646/phytotaxa.359.1.1

DOI

https://doi.org/10.5281/zenodo.13704320

persistent identifier

https://treatment.plazi.org/id/6B6487B2-183E-2623-EB9A-5144D420AB16

treatment provided by

Felipe

scientific name

Nostoc sphaericum Vaucher ex Bornet & Flahault (1886: 208)
status

 

Nostoc sphaericum Vaucher ex Bornet & Flahault (1886: 208) View in CoL Fig. 50 C–D View FIGURE 50 .

Colonies ± spherical, with a firm, smooth periderm, olive-green to yellow-brown in colour, up to 3.5 cm in diameter, free-living or amongst other algae and aquatic vegetation. Individual sheaths usually only visible in mature colonies, where filaments may be surrounded by a distinct, often yellowed and slightly lamellated sheath. Vegetative cells ± barrel-shaped, isodiametric or slightly longer than broad, 3.5–5.5 μm long × 4.1–4.8 μm wide. Heterocytes spherical to oval, 5.5–7.9 μm long × 4–6 μm wide. Akinetes oval, 4.4–6.5 μm long × 4.4–6.6 μm wide, up to 5 in series.

Specimens examined:—Eurong Beach stream #1, Great Sandy Natl Park, Fraser Is. Section.

Observations:—Growing amongst filamentous algae in a shallow, coastal stream draining dune wetlands.

Other records:— Queensland: May (1978), McLeod (1975), Sonder (1880, 1881).

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