Dichotomous table for gallers on Lens
by Hans Roskam
1a On parts above ground => 3
1b On roots => 2
2a Rotund- to oblong-oval nodules, about 3 mm long laterally attached on main- and side-roots. L. culinaris, nigricans: Rhizobium leguminosarum
2b Outside of roots hardly disfigured, inside containing giant cells; bearing temporarily white to dark, about poppy seed- sized egg capsules (cysts). L. culinaris, nigricans: Heterodera schachtii
3a Leaflets of many terminal leaves rolled inwards and upwards, ± bent. L. culinaris, nigricans: Aceria trifolii
3b Flower bud swollen, unopened. L. culinaris: Contarinia sp.
= Early records of Dasineura viciae and Asphondylia ervi on “lentils’” need confirmation.
c Flower bud swollen, unopened. L. culinaris: Contarinia lentis