Dichotomous table for gallers on Lobularia maritima
by Hans Roskam
1a On parts above ground => 2
1b Conspicuous, spindle-shaped to cylindrical, fleshy swellings on roots.
2a Upperside of the leaf with purple, ultimately brown spots. Underside with a greyish-white fungal down consisting of erect conidiophores; towards the tip these are several times branching at right angles. Conidia egg-shaped. Hyaloperonospora lobulariae
2b Usually all flowers of a single or several inflorescences greened. Aceria drabae