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Diagnostic features

Long branching xanthophycean filaments. Filaments are siphonous (lacking cross-walls, and containing numerous nuclei and small yellow-green chloroplasts).  The siphons often break during examination, releasing clouds of chloroplasts.  Forms dark green felt-like mats.

Typical habitats

Slow-flowing waters or in damp marginal habitats, including low light locations


Kingdom Chromista
Phylum Ochrophyta
Class Xanthophyceae
Order Vaucheriales
Family Vaucheriaceae
Common name Yellow-green algae