3. Arabidopsis cebennensis (de Candolle) O’Kane & Al-Shehbaz, Novon 7: 325. 1997; Arabis cebennensis de Candolle, Syst. Nat. 2: 234. 1821; Cardaminopsis cebennensis (de Candolle) Burdet in Greuter & Raus, Willdenowia 13: 86. 1983. TYPE: France, “in locis asperis subumbrosis montium Cebennorum in horto Dei et Bramabiou” (holotype, G-DC).
Herbs, perennial. Stems (25–)40–80 cm, erect, simple at base, branched above, pilose with simple trichomes mixed with stalked forked ones. Basal leaves rosulate; petiole (1–)1.5–4 cm; leaf blade ovate to ovate-lanceolate, 2–7 x 1.5–4.5 cm, sparsely to densely pubescent with stalked, forked or 3-rayed trichomes, base cuneate, margin coarsely and irregularly few toothed, apex acute; cauline leaves 7–15, similar to basal leaves, becoming smaller, short petiolate, and basally attenuate upward. Fruiting pedicels divaricate, slender, 6–12(–15) mm. Sepals oblong, 2.5–3.5 mm, lateral pair saccate; petals deep purple, lavender, or very rarely white, obovate, 7–10 x 2.5–4 mm, slightly spreading; claw entire; filaments usually lavender, 3–4.5 mm; ovules 30–44 per ovary. Fruit linear, (2–)2.5–4.5(–5) cm x 1–1.5 mm, strongly compressed, torulose; valves with a distinct midvein; gynophore to 1 mm; styles slender, 0.8–1.2 mm. Seeds reddish brown, compressed, 1.2–1.6 mm, narrowly winged distally; cotyledons accumbent.
Habitats: slopes, forest margins.
Elevation: 600-2300 m.
Distribution: SE France.