Isolation of isoorientin and orientin from bamboo leaf flavones using preparative high-performance liquid chromatography Comparison study on Total Flavonoid Content and Anti-free Redical Activity of the Leaves of Bamboo,phyllostachys nigra, and Ginkgo bilabo Study for anti-tumor and neuroprotection of extract from bamboo leaf Comparative anatomy of leave of genus Drepanostachyum and Ampelocalamus