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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Oedogonium<br />
Classification: Chlorophyta (Family Oedogoniaceae)<br />
General habit: unbr<strong>an</strong>ched filaments <strong>of</strong> cylindrical<br />
cells, c<strong>an</strong> form dense mats <strong>of</strong> coiled filaments,<br />
yellowish-green in color, epilithic or epiphytic on<br />
submerged surfaces in streams<br />
Species in Hawai‘i: O. crispum, O. globosum, O.<br />
undulatum, Oedogonium sp.<br />
Isl<strong>an</strong>d distribution: Kaua‘i, O‘ahu, Maui, Hawai‘i<br />
Distinguishing features: filaments unbr<strong>an</strong>ched,<br />
chloroplast a reticulate network (Fig. E),<br />
characteristic “rings” present at one end <strong>of</strong> m<strong>an</strong>y <strong>of</strong><br />
the cells (Fig. E, F) due to unequal cell divisions<br />
Compare with: Cladophora, Rhizoclonium<br />
31<br />
A. Large growth <strong>of</strong> Oedogonium attached to a<br />
submerged br<strong>an</strong>ch in a stream. Scale bar = 5cm.<br />
B. Oedogonium filaments viewed under a dissecting<br />
microscope. Scale bar = 1mm C. Unbr<strong>an</strong>ched<br />
filaments. Scale bar = 40µm. D. Variation in cell<br />
shape in Oedogonium. Scale bar = 25µm. E. High<br />
magnification view <strong>of</strong> Oedogonium cells illustrating<br />
the reticulate chloroplast. Scale bar = 30µm.<br />
F. View <strong>of</strong> rings formed at the ends <strong>of</strong> cells in<br />
Oedogonium due to unequal cell division processes.<br />
Scale bar = 30µm.
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