Seed Morphology of Impatiens L. (Balsaminaceae) and Its Taxonomic Significance

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Seed Morphology of Impatiens L. (Balsaminaceae) and Its Taxonomic Significance

Lu Ying-Qing, Chen Yi-Ling

Received:1900-01-01 Revised:1900-01-01 Online:1991-05-10 Published:1991-05-10
Contact: Lu Ying-Qing

Abstract

Abstract:

The seed surface of 12 species of Impatiens L. from Mt. Omei was observed under

SEM for the first time. The important characters used in the paper include cell specialization

on seed surface, arrangement pattern of the cells, the degree of the cell elevation, chalazal

zone morphology and appendix at the tail of the seed. According to these characters, the seed

surface morphology of 12 species can be divided into two types: 1. the seed without conspicu-

ous differentiation of surface cells, laevigate on the surface, represented by I. wilsoni; the

seeds of species indicated by 3-colpate pollen grains are expected to belong to the type. 2. the

seed with the large cell elevation at different levels, surface scabrous, represented by the other

11 species; most species with 4-colpate pollen have this kind of seeds. The results verify that

the seed morphology of the genus can supply characters significant to taxonomy of the genus

at species level. The evolution of seed surface of Impatiens has close correlation with that of

the flower and pollen morphology.

Key words: Impatiens, Seed Surface, Taxonomy

Lu Ying-Qing, Chen Yi-Ling. Seed Morphology of Impatiens L. (Balsaminaceae) and Its Taxonomic Significance[J]. .

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Seed Morphology of Impatiens L. (Balsaminaceae) and Its Taxonomic Significance

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