Stem simple, erect, 20-40 cm. Basal leaves alternate; leaf blade elliptic-obovate, ca. 8.5 × 3 cm, base attenuate, margin entire, apex acute. Stem leaves alternate; leaf blade linear, ca. 2 × 0.2 cm, base attenuate, margin irregularly undulate and obtusely dentate, apex acute. Cyme flat topped, very dense, ca. 7 × 10 cm. Sepals oblong-lanceolate, 2-2.5 × ca. 0.7 mm. Petals erect and spreading, purple, obovate-oblong, ca. 5 × 1.5 mm. Stamens ca. 5 mm; anthers yellow. Nectar scales spatulate-rectangular, longer than wide, base subcuneate, apex rounded. Carpels erect, free, ovoid, ca. 5 mm; stipe ca. 1 mm. Styles ca. 1 mm. Seeds brown, linear, ca. 1 mm. Fr. Oct.
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