Uredinopsis struthiopteridis Störmer, 1895
Spermogonia at the underside of the current year needles, subepidermal, colourless. There also in two rows the aecia, up to 0.2 mm wide and 1 mm high, white, fragile.
Abies alba, balsamea, sachalinensis var. mayriana.
uredinia hypophyllous, mostly sub-epidermal. The urediniospores are extruded as a thread; they are short-stalked elliptic, distally tapering into a sharp beak. A second type of uredionospores is long-stalked and pyriform. The more or less globular, usually 4-celled teliospores are formed below the epidermis, scattered in the leaf mesophyll.
Brandenburger (1985a: 7, 16), Gäumann (1959a), Klenke & Scholler (2015a), Poelt (1986a), Termorshuizen & Swertz (2011a).