The green Algae of North America [with first and second supplement and with Working key.

"Published by the Charles Hyde Olmstead Fund."--T.p.Includes bibliographies.[v.1] The green algae of North America, pp. 79-480 and plates 1-18 -- [v.2] The green algae of North America, supplementary paper by Frank S. Collins, Dydymosporangium repens, new genus and species of Chaetophoraceae, by F. D. Lambert -- [v.3] The green algae of North America, second supplement, by Frank S. Collins -- [v.4] A working key to the genera of North American algae, by Frank Shipley Collins.Mode of access: Internet