| The dissertation studies on some key processes of reproductiveness in order to provide atheoretical basis for resources silviculture of Cyclocarya paliurus and their new product development, including morphological differentiation of flower bud, anatomy structure of gametophyte development, morpha of stigma and pollen, viability and storability of pollen,characteristics of fruit development, and the results showed as follows.1.The growth habit of Cyclocarya paliurus was observed in phenological phase. The stigmas were mature and pollinated in late April, The male flowers were mature and shed pollen in mid-May, pollen-shedding would last for a week or so. The dichogamy between male flower and female flower was obvious within a plant.2.Male flower development can be divided into four periods. It consisted of formation of stamens, development of anthers, formation of microspore, formation of male gametes. Female flower development can be divided into six periods. It included flower bud differentiation prophase, formation of inflorescence primordia,formation of sepal primordial and involucre primordial, development of pistil, development of ovule, development of megaspore and female gametes. And the corresponding relationship between male gametophyte and tapetum cells, the external morphology and anatomical structure of flower development.3.2-lobed stigmas of C. paliurus were plumose and dry.4.Morphology of pollen looked like oblate spheroid, from equator side like oval, and pole side pentagon. The mature pollen grains with surface ornamentation of granule contained 4-5 apertures around the equator. The extine of pollen was composed of tectum, columellae, cushion layer and the intine was unnoticable.5.The optimum culture medium was 10 mg/L boric acid with 10% sucrose. The combination of a moisture content of 7.3% and storage temperature of–80°C was the best storage condition, which could retain pollen viability to about 50% after a 4-month storage.
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