Dichotomous table for gallers on Conioselinum vaginatum
by Hans Roskam
1a Distinctly protruding smaller or up to about 20 mm long, ± distorted coalesced bulging swellings, bearing blackish, 3-celled, loosely long-spined telia. Nyssopsora echinata
1b Similar, usually less protruding bulges on leaf midrib, bearing, however, spermogonia and aecia. Puccinia altensis