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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Stigonema<br />
Classification: Cy<strong>an</strong>obacteria (Family<br />
Stigonemataceae)<br />
General habit: filaments multiseriate (several cells<br />
thick on the main axis), forming small clumps amid<br />
other filaments <strong>of</strong> algae, sometimes present as a<br />
mat, specimens in Hawai‘i usually highly pigmented<br />
a yellowish-brown color, epilithic or epiphytic<br />
Species in Hawai‘i: S. mamillosum, S. minutum<br />
Isl<strong>an</strong>d distribution: L<strong>an</strong>a‘i, Maui, Hawai‘i<br />
Distinguishing features: this is the only common<br />
multiseriate cy<strong>an</strong>obacterium in the <strong>Hawaii</strong><strong>an</strong><br />
stream algal flora, filaments br<strong>an</strong>ched with a firm<br />
mucilaginous sheath, c<strong>an</strong> be highly pigmented,<br />
heterocysts present<br />
Compare with: Scytonema<br />
22<br />
A. A piece <strong>of</strong> a mat formed by Stigonema filaments<br />
, viewed with a dissecting microscope.<br />
Scale bar = 5mm. B. Multiseriate filaments <strong>of</strong><br />
Stigonema viewed under a compound microscope.<br />
Scale bar = 50µm.
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