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苦草(Vallisneria spiralis)为水鳘科多年生沉水植物。叶丛生于白色的匍匐茎上,叶片带形细长,自然生长,长可达1—2米,宽5—10毫米。它营养繁殖力强,易于培养,将一段带有叶丛的匍匐茎放于水槽中,如在室内过冬,一年四季均可生长,取材方便。实验时,取一段长2—3毫米的苦草叶片,置于已滴有水的载玻片上,加上盖玻片后即可观察。在显微
Vallisneria spiralis is a perennial submerged macrophyte. Leaves clumped to white stolons, leaf blade slender, naturally growing, up to 1-2 meters long, 5-10 mm wide. It is highly vegetative and easy to grow, placing a stolon with leaves and clumps in the sink, as winter indoors, growing throughout the year and easy access. Experiment, take a length of 2-3 millimeters of bitter grass leaves, has been placed on the slides of water slides, with coverslips can be observed. In microscopic