知母是中药中的名药,这是一种百合科知母属的多年生草本植物,知母属植物仅此一种。知母有根状茎,肥大,外密生许多残叶叶茎;另生有许多根,根长而较粗;叶丛生,像禾草叶,细长,质地较硬。叶长可达70厘米,宽仅3～6厘米。夏天 Anemarrhena is a traditional Chinese medicine in the name of medicine, which is a liliaceae genus perennial herb, genus only this one. Anemarrhena has rhizomes, hypertrophy, many of the external leaves of the stalk leaves; the other students have many roots, root length and thick; leaf clusters, like grass leaves, slender, hard texture. Leaf length up to 70 cm wide and only 3 to 6 cm. summer