C. Stace, New flora of the British Isles, ed. 3. 2010R. D. Meikle, Flora of Cyprus 1. 1977
but modified and names used differing
1Inflorescences usually short, mostly leaf-opposed
1'Inflorescences usually elongate, terminal racemes or panicles
2Not scented; petals longer than sepals; pedicels shorter than fruit; fruit 2-3.5 mm long with protruding style
2'Strong smelling when crushed; petals shorter than sepals; pedicels longer than fruit; fruit 1.2-1.7 mm long with very short included style
3Fruit not or scarcely dehiscent; inflorescence a more or less corymbose panicle
3'Fruit readily dehiscent; inflorescence a raceme or a racemose to pyramidal panicle
4Silicle cordate, inflated, its base distinctly emarginate; leaves often rather grey-pubescent
4'Silicle ovate, elliptical or sub-deltoid, much compressed, its base narrowed or truncate; leaves glabrous to thinly pubescent
5Flowers yellowish; leaves conspicuously dimorphic, the lower pinnatipartite, the upper simple, entire, ovate-amplexicaul
5'Flowers white or tinged mauve; leaves more or less uniform, entire, irregularly lobed or pinnatipartite
6Fruiting racemes terminating in a sharp spine
6'Fruiting racemes without spine
7Silicle 4-6 x 3-4 mm, usually longer than pedicel
7'Silicle 1.5-4 x 1.5-3 mm, usually shorter than pedicel
8Perennial with thick, branched root; silicle not winged
8'Annual with slender taproot; silicle winged