This new key is based on the cited floras. It needs further testing as regards Cypriot material. Various details have been supplemented.
| 1 | Plant stinking of rotting fish when fresh, usually procumbent to ascending, strongly farinose; leaf-margin sometimes angled at the widest point but otherwise entire |
| 1' | Plant not stinking when fresh, usually ascending to erect, farinose or not; leaf-margin usually toothed or lobed, if entire, then leaf-blades very narrow |
| 2 | Edge of seed distinctly keeled; pericarp firmly adherent to seed; tepals with a conspicuous keel near apex; leaf-margin distinctly serrate |
| 2' | Edge of seed convex or indistinctly keeled; pericarp free or adherent to seed; tepals with a rounded back or keeled along most of their length; leaf-margin entire to dentate or serrate |
| 3 | Inflorescences not or very sparsely farinose |
| 3' | Inflorescences farinose, especially when young |
| 4 | All flowers with 5 tepals; horizontal seeds with black testa; inflorescence with strictly erect branches |
| 4' | Terminal flowers with 5, lateral flowers with 3 tepals; horizontal seeds with brown or redbrown testa; inflorescence not with strictly erect branches |
| 5 | Leaf-blades about as long as wide, distinctly 3-lobed |
| 5' | Leaf-blades clearly longer than wide, entire to slightly 3-lobed, if wider than long then plant with purple vesicular hairs |
| 6 | Seeds broadly ovate, 1-1.2 mm diam.; blades of lower leaves often narrowly oblong to elliptic, i.e. with parallel sides or trullate, with entire to regularly dentate margin |
| 6' | Seeds suborbicular, (1-)1.2-1.5 mm diam.; blades of lower leaves various but not oblong to elliptic; margin entire to irregularly serrate, teeth sometimes lobe-like |
| 7 | Leaf-blades up to 2.5(-3.5) cm long, more than twice as long as wide; those of lower leaves trullate, fairly acute; plant more or less as high as wide, with long, procument, basal branches, typical tumbleweed habit |
| 7' | Leaf-blades usually at least 3 cm long, about twice as long as wide, elliptic to oblong, obtuse; plant usually higher than wide, with pyramidal growth |
| 8 | Usually (10-)30-70(-150) cm high; plant without purple vesicular hairs; leaf-blades up to 8 x 3.5 cm |
| 8' | Often up to 200 cm high; young parts of the plant usually covered with purple vesicular hairs or plant at least tinged with red |
| 9 | Always with at least some leaves longer than 6 cm, often leaves up to 14 cm long, not coriaceous; shoots extensively reddish-purple; basal leaves irregularly toothed but scarcely lobed |
| 9' | Leaves usually less than 6 cm long, sometimes leaves up to 14 cm long, somewhat coriaceous; plant tinged with red; lower leaves with distinct basal lobe on each side |
