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Name derivation:
From the Greek hapalos, soft, tender, and siphon, a tube
Classification:
Hapalosiphon Nägeli ex Bornet and Flahault 1886; 15 of 77 species descriptions are currently accepted taxonomically (Guiry and Guiry 2013). Order Nostocales; Family Hapalosiphonaceae
Morphology:
Uniseriate trichomes within colorless sheaths arranged in coiled clusters that initially grow attached to substrates and later are found floating among other vegetation.
Similar genera:
Habitat:
In the littoral zones of lakes and swamps.
References:
Bornet, É. and C. Flahault 1886 '1887'. Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France. Annales des Sciences Naturelles, Botanique, Septième série 5: 51-129. Graham, L. and L. Wilcox 2000. Algae. Prentice-Hall Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 28 February 2013.