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Name derivation:

After Henry Grinnell, American botanist from New York.


Grinnellia  Harvey  2853;  2 of 3 species descriptions are currently accepted taxonomically (Guiry and Guiry 2016).

Subclass Florideophyceae; Order Ceramiales; Family Delesseriaceae



Large monostromatic membranous thallus with short stipes attached with discoid holdfasts.  Obviouis midribs near the bas, inconspicuous above (Dawes and Mathieson 2008).

Similar genera:

Basonym of G. americana: Delesseria americana. C. Agardh 1822.



Temperate to subtropical coasts, uncommon (Ibid.).




Dawes, C.J. and A.C. Mathieson 2008. Seaweeds of Florida. University Press of Florida (592 pp).

Guiry, M.D. and G.M. Guiry  2014.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 30 May  2014.

Harvey, W.H.  1853.  Nereis boreali-americana; or, contributions towards a history of the marine algae of the atlantic and pacific coasts of North America. Part II. Rhodospermeae.  Smithsonian Contributions to Knowledge 5(5): [i-ii], [1]-258, pls XIII-XXXVI.