Herba Siegesbeckiae Perennial herb, high 60~150cm. Thick root. Stem stout, four prism, sulcate andstripes, distally densely star Sao tomentellate,lower sparsely stellate sparsely puberulent, branched. Proximal cauline leaves long petiolate 7~13cm; leaf blade cordate or broadly ovate, upper ovate, long 7~18cm, wide 6~15CM, apex acute acuminate or caudate acuminate, base cordate to rounded, the edge is the corpus callosum pointed in the dentate,candidates above sparsely stellate pubescent and simple hairs below densely stellate soft short hair; bracts egg dishes or ovate lanceolate over inflorescences many stems, long 0.5~5.5cm. Verticillaster inflorescence stems; bracts leaflike, linear lanceolate, usually long 4~13mm. Wide 1.5~5mm; calyx tubular,outside is gray stellate short tomentose. Calyx teeth 5 teeth; corolla white or yellow, limb 2~lipped, upper lip margin fimbriate, inner surface is barbate,lower lip 3 ~ lobed, smaller lateral fissure; stamens 4, strong inside silk coat, after the filaments at the top of the hair ring hook anti fold appendages;style apex ranging from 2 short crack. Small nuts glabrous.
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