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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Stigeoclonium<br />
Classification: Chlorophyta (Family<br />
Chaetophoraceae)<br />
General habit: br<strong>an</strong>ched filaments forming feathery<br />
tufts or exp<strong>an</strong>ses, yellow-green to grass-green in<br />
color, not enclosed in mucilage, attached to<br />
submerged rock or vegetation in streams<br />
Species in Hawai‘i: S. amoenum, S. falkl<strong>an</strong>dicum, S.<br />
fasciculare, S. flagelliferum, S. lubricum, S.<br />
nudiusculum, S. pachydermum, S. segarare, S.<br />
setigerum, S. stagnatile, S. subsecundem, S. tenue,<br />
S. variabile, Stigeoclonium sp.<br />
Isl<strong>an</strong>d distribution: Kaua‘i, O‘ahu, Maui, Hawai‘i<br />
Distinguishing features: br<strong>an</strong>ched filaments,<br />
br<strong>an</strong>ches c<strong>an</strong> be arr<strong>an</strong>ged opposite, alternate, or<br />
sometimes dichotomously, filaments tapering to a<br />
blunt point or a long hair, chloroplast plate-like <strong>an</strong>d<br />
encircling the cell (especially visible along the main<br />
axis), not as much distinction in the diameter <strong>of</strong> the<br />
main axis versus the br<strong>an</strong>ches (compared with<br />
Cloniophora)<br />
Compare with: Chaetophora, Cloniophora<br />
35<br />
A. An epilithic tuft <strong>of</strong> Stigeoclonium as viewed<br />
under a dissecting microscope. Scale bar = 0.5cm.<br />
B. Br<strong>an</strong>ched filaments viewed under a compound<br />
microscope. Scale bar = 50µm. C. Main axis <strong>of</strong> a<br />
pl<strong>an</strong>t showing the plate-like chloroplasts. Scale<br />
bar = 30µm. D, E. Br<strong>an</strong>ching patterns <strong>of</strong> some<br />
Stigeoclonium viewed under a compound microscope.<br />
Scale bar = 50µm (D), 80µm (E).