Common Self-heal Prunella Vulgaris Seeds Xia Ku Cao
夏枯草 xia ku cao
Stems 20-30 cm, ascending, base much branched, purple-red, sparsely strigose or subglabrous. Petiole 0.7-2.5 cm, upper ones shorter; leaf blade lanceolate to ovate, 1.5-6 × 0.6-2.5 cm, glabrous to sparsely villous, base truncate to broadly cuneate-decurrent, margin undulate to entire, apex obtuse to rounded. Spikes 2-4 cm, sessile; floral leaves similar to cauline leaves, sessile or short petiolate, subovate; bracts purplish, broadly cordate, ca. 7 × 11 mm, cuspidate, veins sparsely hispid. Calyx campanulate, ca. 1 cm, sparsely hispid, tube ca. 4 mm; upper lip suboblate, subtruncate; lower lip narrower, teeth acuminate. Corolla purplish or white, ca. 1.3 cm, slightly exserted, glabrous; tube ca. 7 mm, base ca. 1.5 mm wide, gradually dilated to ca. 4 mm wide at throat; upper lip subcircular, ca. 5.5 mm in diam., ± galeate, emarginate; lower lip ca. 1/2 as long as upper lip, middle lobe subobcordate, fringed; lateral lobes oblong, spreading, minute. Anterior stamens very long. Nutlets oblong-ovoid, ca. 1.8 × 0.9 mm, slightly 1-furrowed. Fl. Apr-Jun, fr. Jul-Oct.
Open slopes, grasslands, wet streamsides, forest margins, thickets; 0-3200 m. Fujian, Gansu, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Bhutan, India, Japan, Kazakhstan, Korea, Kyrgyzstan, Nepal, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan; Africa, SW Asia, Europe, North America]
1 Leaves ovate-oblong to ovate, 1.5-6 × 0.7-2.5 cm, inconspicuously undulate to subentire; adaxially hirtellous or subglabrous; abaxially subglabrous 1a var. vulgaris
+ Leaves lanceolate to oblong-lanceolate, 1.5-4 × 0.6-1 cm, entire, glabrous or sparsely villous 1b var. lanceolata
Prunella vulgaris var. lanceolata (Barton) Fernald
Prunella vulgaris var. vulgaris
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