Doassansiopsis intermedia (Setch.) Vánky 1981

Doassansia intermedia Setch. Bot. Gaz. 19 : 185. 1894
Doassansia affinis Ellis & Dearness, Bull. Torrey Club 22 : 364. 1895. (Type from Canada, on Sagittaria variabilis.)
Sori in leaves, forming light-yellow to brownish subcircular spots, 5-12 mm. in diameter, with spore-balls showing as minute hypophyllous pustules ; spore-balls situated in the spongy parenchyma, consisting of a cortex surrounding several layers of spores and a central mass of parenchymatous cells, ellipsoidal to spherical, 200-300 //in length; cortical cells with dark-brown moderately thick walls, chiefly subspherical, cubical, or polyhedral, occasionally more elongate, of medium size, 9-14 /i in length; parenchymatous cells thinwalled, empty, about the size of the spores or slightly larger ; spores adhering rather firmly, ellipsoidal to chiefly spherical, chiefly 8-11 y, in length.
On Alismaceae :
Sagittaria latifolia {S. variabilis'), Iowa, Minnesota, New Hampshire, Wisconsin ; Canada. Type locality: Shelburne, New Hampshire, on Sagittaria variabilis (S. latifolia). Distribution : New Hampshire to Minnesota and Iowa ; Canada.