SCUTELLOSPORA HAWAIIENSIS - A NEW SPECIES OF ARBUSCULAR MYCORRHIZAL FUNGUS FROM HAWAII

Scutellospora hawaiiensis, a species common in coastal sand dunes of Hawaii, is described. The pale orange-brown to red-brown spores have six walls; an outermost unit wall (1.2-2.0 mu m thick) appressed to a laminated wall (0.8-2.2 mu m), a coriaceous wall (2.8-4.8 mu m), a new type of wall (the ''notching wall'') (0.5-1.6 mu m), whose broken edges consist of a series of rectangular and V-shaped notches, resembling a torn linen cloth, a coriaceous wall (2.0-3.3 mu m) and a thick amorphous wall (3.0-4.0 mu m, expanding up to 88 mu m when crushed in acidic mountants).