8. Arabidopsis pedemontana (Boissier) O’Kane & Al-Shehbaz, Novon 7: 326. 1997; Arabis pedemontana Boissier, Diagn. Pl. Orient. 1: 69. 1843; Arabis cebennensis de Candolle subsp. pedemontana (Boissier) P. Fournier, Quatre Fl. France 421. 1936; Cardaminopsis pedemontana (Boissier) Burdet in Greuter & Raus, Willdenowia 13: 86. 1983. TYPE: [Switzerland], “In regione alpina montium Pedemontii, legi Aug. supra limitem arborum in collo inter Crissolo et Luzerna sitio” (holotype, G-BOIS).
Herb, perennial. Stems 10–30 cm, erect, simple or branched above, glabrous or subglabrous. Basal leaves rosulate; petiole (1.5–)2.5–6(–7) cm; leaf blade orbicular to broadly ovate-cordate, (1.5–)2–5 x (2–)2.5–5.5 cm, glabrous or very rarely sparsely pubescent with simple and stalked forked trichomes, base truncate to cordate, margin coarsely and irregularly few toothed or entire, apex obtuse to subacute; cauline leaves 3–6, smaller than basal ones, petiolate, broadly ovate or uppermost subsessile and lanceolate, gradually reduced in size upward, base cuneate, margin coarsely dentate, apex acute. Fruiting pedicels divaricate to ascending, 7–12(–15) mm. Sepals oblong, 2.5–3.5 mm, lateral pair saccate; petals white, obovate, 6–7 x 2–3.5 mm; claw not toothed; filaments white, 2.5–4 mm; ovules 20-30 per ovary. Fruit linear, 1.5–3 cm x 1–1.5 mm, strongly compressed, slightly torulose; valves with a distinct midvein; gynophore to 0.5 mm; styles slender, to mm. Seeds reddish brown, compressed, 0.9–1.4 mm, broadly winged at least distally; cotyledons accumbent.
Habitats: mountain slopes, forest margins.
Distribution: NW Italy, presumably extinct in adjacent SW Switzerland.