基隆南芥 ji long nan jie

Arabis alpina Linnaeus var. japonica A. Gray; A. fauriei H. Léveillé (1910), not H. Boissieu (1899); A. japonica (A. Gray) A. Gray (1858), not Regel (1863); A. kelunginsularis Hayata; A. lithophila Hayata; A. stelleri de Candolle subsp. japonica (A. Gray) Voroschilov; A. stelleri var. japonica (A. Gray) F. Schmidt; A. yokoscensis Franchet & Savatier.

Herbs perennial, (10-)20-35(-45) cm tall, sparsely to densely pilose, with a mixture of simple and stalked, forked or 3- or 4-rayed stellate trichomes. Stems erect or ascending, simple or branched at base, basally with primarily simple trichomes. Basal leaves rosulate; petiole 1-2 cm, winged; leaf blade spatulate or oblanceolate, obovate, or oblong, (1-)2-5.5(-7) × (0.5-)1-2(-2.8) cm, base attenuate, margin entire or occasionally denticulate, apex rounded or obtuse. Middle cauline leaves sessile, oblong or ovate, (1.2-)2-5(-7) × (0.4-)0.7-1.5(-2) cm, pilose with predominantly stellate and forked trichomes, base auriculate, cordate, or rarely amplexicaul, margin dentate or entire, apex obtuse or rounded. Racemes ebracteate. Fruiting pedicels erect or rarely ascending, often subappressed to rachis, 0.7-1.5(-2) cm, slender, straight. Sepals oblong, 4-5 × 1.5-2 mm, glabrous, lateral pair saccate. Petals white, spatulate, 7-10 × 3-4 mm, apex shallowly emarginate. Filaments 3.5-6 mm; anthers oblong, 1-1.5 mm. Ovules 34-60 per ovary. Fruit (2.5-)3-5(-6) cm × 1.5-2 mm, erect, appressed to rachis; valves with a prominent midvein extending full length, torulose, glabrous; style (0.1-)0.5-1(-1.5) mm. Seeds brown, suborbicular or ovate-oblong, 0.9-1.4 × 0.8-1 mm, uniseriate, narrowly winged distally; wing to 0.1 mm wide. Fl. Apr-Jun, fr. May-Aug. 2n = 32.

Sandy coasts, roadsides, streamsides, forest margins; near sea level to 600 m. Taiwan [Japan, Korea, Russia].