关键词: 莲, 幼苗, 初生维管系统

Abstract: Nelumbo nudfera Gaertn. has a no - radicle seedling. The lower part of the cotyledon lamina fuses into a tube - shaped object, and comes into an integrity with the cotyledon node zone (CNZ) and the part below it. The lower part of CNZ has a χ - shape haplostele. The middle part has a haplostele with the xylem enclosed by the phloem. The six vascular bundles of the cotyledon trace extend into the cotyledon ra-diantly and evenly. The haplostele of the middle part of CNZ is separated into 4 ~ 6 big vascular bundles which were in the central part of the atacto - stele in the upper part of CNZ. Part of the small vascular bun-dles of the atacto - stele originals from the division of the cotyledon trace, and the other comes from rediffer-entiation of the surrounding parenchyma cells.

Key words: Nelumbo nucifera