关键词: 石蒜属, 花粉形态, 超微结构

Abstract: Pollen grains of 11 species of Lycoris from China were examined under light microscope and scanning electron microscope and those of 6 species of Lycoris were examined under transmis-sion electron microscope. Pollen grains of Lycoris of China are navicular or reniformis, ( 25- 37.5) x (67.5-100) ^m in size, monocolpate. The exine is 2-layered, 1.3-2.5 /wi thick. The character of pollen grains of 11 species differs from each other in ornamentation, formation and width of muri, size of lumins, ratio of length of baculum and caput of pilum etc. The exine reticulate ornamentation under LM and SEM. The ektexine consists of semitectate, columellae and foot-layer under TEM. The ecdexine is very thin.The systematic positions of Lycoris were discussed based on characteristics of pollen grains and other organs.

Key words: Lycoris