24. Dracocephalum imbricatum C. Y. Wu & W. T. Wang, Fl. Yunnan. 1: 588. 1977.
覆苞毛建草 fu bao mao jian cao
Rhizomes ca. 5 mm in diam. Stems unbranched, ascending, 12-18 cm, densely retrorse scaly puberulent, sparsely villous along angles. Basal leaves ca. 5; petiole slightly shorter to longer than blade; leaf blade broadly triangular-ovate to narrowly ovate, (0.5-)1.5-3.5 × 2-2.5 cm, adaxially subglabrous, slightly scabrid, abaxially sparsely white floccose-villous, densely puberulent along veins, base cordate, margin crenate, apex rounded. Verticillasters in terminal spikes 4-5.5 cm; bracts dark purple-blue, overlapping, subcircular, margin subentire, apex rounded but some-times mucronate, subglabrous, margin densely white ciliate, inconspicuously veined. Calyx ca. 1.6 cm, densely villous, ciliate, 2-lipped to ca. 1/2 its length; upper lip middle tooth oblate, to 8 mm wide, apex subtruncate, mucronate, lateral lobes lanceolate, apex acuminate; lower lip teeth similar to lateral teeth of upper lip. Corolla dark purple, ca. 2.5 cm, densely pubescent; lower lip ca. 1 cm, 3-lobed, middle lobe narrowly obovate, to 6 mm, apex emarginate; lateral lobes obliquely triangular, ca. 5 mm, apex somewhat rounded. Fl. Sep.
* Alpine slopes; ca. 4000 m. Yunnan (Zhongdian Xian)
Related to Dracocephalum wallichii, but differs in the subcircular overlapping bracts.