Skip to main content

Rivularia

Rivularia

The tapering filaments are up to 12um in diameter and are much branched, with heterocysts at the bases of the branches. These filaments are united to gorm tough hemispherical colonies several mm in diameter, especially conspicuous on stones in stones in mountain streams, but also occurring on reeds and other stems in pools. 109a, colonies on a stone, natural size: 109b. part of a branched filament; 109c. filaments more highly magnified. 

Calothrix has filaments like Rivularia, but is much less branched, and the filaments occur singly or in tufts rather than colonies.












RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41

Comments

Post a Comment

Popular posts from this blog

Anabaena

Anabaena Planktonic filamentous algae recognisable by their beaded appearance, often curly, and sometimes having thick walled clearer 'heterocysts' (specialised cells) and sausage shaped dense spores at intervals. Cells up to 10um across.Common in the plankton of lakes and ponds, but sometimes occurring in bogs. The figures show parts of two filaments at different magnifications. RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41
Post a Comment
Read more

Stigonema

Stigonema The filaments branch irregularly, and usually from dark furry masses on damp rocks. The cells are rounded, and lie several abreast in the older parts, as shown. Heterocysts scattered, but are not regularly at the bases of branches. The cells vary from 3 to 30um in diameter, but of course the older parts of the plant are very much wider than this. 110a, part of whole plant x20; 110b, tip of a plant showing irregular rows of cells surrounded by mucilage... RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41
Post a Comment
Read more

Chaetophora

Chaetophora Branched filaments growing into wooly tufts or balls from which project long colourless hairs.Cells up to 20 micron across.Common as epiphyte of water plants or sticks or stones.sometimes encrusted with crystals of calcium carbonate. RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41
Post a Comment
Read more