Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
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Tolypothrix<br />
Classification: Cy<strong>an</strong>obacteria (Family<br />
Microchaetaceae)<br />
General habit: a falsely br<strong>an</strong>ched cy<strong>an</strong>obacterium<br />
that forms fluffy tufts <strong>an</strong>d exp<strong>an</strong>ded masses due to<br />
intertwined filaments, bluish-green to brown in<br />
color, usually epilithic, c<strong>an</strong> be several cm in length<br />
Species in Hawai‘i: T. distorta, T. nodosa, T. tenuis<br />
Isl<strong>an</strong>d distribution: O‘ahu, Hawai‘i<br />
Distinguishing features: false br<strong>an</strong>ches occur<br />
singly, arising at a heterocyst (pale colored cell,<br />
larger th<strong>an</strong> vegetative cells), filaments surrounded<br />
by a sheath that is usually thin <strong>an</strong>d sometimes<br />
layered<br />
Compare with: Scytonema<br />
23<br />
A. An epilithic mat formed by Tolypothrix. Scale<br />
bar = 1mm. B. Compound microscope view <strong>of</strong><br />
intertwined Tolypothrix filaments. Scale bar =<br />
100µm. C. A single filament illustrating single<br />
false br<strong>an</strong>ching at a heterocyst. Scale bar = 30µm.
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