Burrillia pustulata Setch. 1891

Burrillia pustulata Setch. Proc. Am. Acad. 26 : 18. 1891
Doassansiopsis pustulata Dietel, in B. & PNat. Pfl. 1^** : 22. 1897.
Sori in leaves, forming small hypophyllons blisters irregnlarly clnstered or scattered over the surface and eventually rupturing, showing above as small more or less distmct Yellowish or reddish-brown areas ; spore-balls situated in the spongy parenchyma, consisting of several irregular layers of fertile cells within which is a central mass of parenchymatous cells with oily contents, ellipsoidal, large, 200-350^ in length ; spores rather firmly adhering, subspherical or polyhedral, rarely more irregular, chiefly 8-12// m diameter.
^"^ S^^"''/^^^^^^^ (^^o.riahilis^, Illinois, Nebraska, Wisconsin Type focALiTY : Dixon, Illinois, on Sagittarta vart-ahths iS. latt/oha). Distribution : Illinois, Wisconsin, and Nebraska.