The glandular hair spreads in this genus widely.
腺毛在所观察的植物中普遍存在。
There are 1 or 2 secretory cells in a capitate glandular hair but 8 secretory cells in a peltate glandular hair.
头状腺毛的头部只有1个或2个分泌细胞，盾状腺毛由8个分泌细胞构成头部。
The leaf powder movie-making, may observe the glandular hair, the non-glandular hair(2~6 cells)and the spiral vessel;
地黄叶粉末制片，可观察到腺毛、非腺毛（2～6个细胞不等）及螺纹导管；
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