Pediastrum ovatum (Ehrenberg) A. Braun 1855


Division     Chlorophyta
Class     Chlorophyceae
Order     Sphaeropleales
Family    Hydrodictyaceae
Basionym     Asterodictyon ovatum Ehrenberg
SynonymPediastrum simplex f. ovatum (Ehrenberg) Raciborski; Pediastrum simplex var. ovatum (Ehrenberg) Tiffany

    Colonies usually 4-8-16- (rarely 32-) celled, with the cells arranged in a ring round a central space or with one or more interior cells and a number of marginal cells, perforate or almost imperforate, the perforations being small. Cells plumper with the outer sides of peripheral and often central cells convex. Cell wall smooth or ornamented. Colonies 60-100 µm in diameter. Cells 8-20µm broad, 15-38µm long.


Ecology

Free floating colony and prefers mesotrophic to eutrophic water bodies.