台湾青葙 tai wan qing xiang

Herbs erect. Stem tinged white, glabrous. Petiole ca. 2.5 cm; leaf blade lanceolate or linear-lanceolate, ca. 19 × 1.7 cm, both surfaces glabrous, base attenuate, margin undulate, apex acuminate. Flowers very dense. Spikes terminal or axillary, ovate or ovate-cylindric, ca. 4 × 1.5 cm, apex acuminate; very shortly stalked. Bracts and bracteoles ovate, ca. 4 mm, apex acuminate, with an awn abaxially. Tepals blue, oblong-ovate, ca. 5 mm, transparent, apex acuminate or acute. Filaments transparent, compressed; anthers narrowly oblong. Ovary obconic, ca. 1 mm; style ca. 3 mm. Seeds unknown.

* Taiwan (Taidong).