Subjects: Biology >> Botany >> Applied botany submitted time 2022-03-30 Cooperative journals: 《广西植物》
Abstract： Two new tetraploids quillworts species, Iso雝es longpingii and I. xiangfei, from China are described and illustrated. I. longpingii is a fully submerged plant found in a small pond of Hunan Province. It is morphologically similar to I. sinensis, but differs in its small and tuberculate-cristate megaspores and soft slender leaves that grow up to 60 cm. It is also similar to hexaploid I. orientalis, but differs in its 44 chromosomes and tuberculate-cristate megaspores. I. xiangfei is most similar to diploid I. yunguiensis in megaspore ornamentation, but differs in its microspore ornamentation, oblong sporangium, and 44 chromosomes. There are a few individuals of I. longpingii found in Ningxiang County of Hunan Province, and I. xiangfei is distributed in the wetlands of Tongdao and Huitong counties of Hunan Province. Because of their limited geographic range, small populations, fewer individuals and disturbed habitats, I. longpingii and I. xiangfei are ecaluated as critically endangered (CR) and vulnerable (VU) category, respectively, according to the IUCN Red List criteria. A key to all the current known Chinese quillworts is also provided for further taxonomic identification and conservation of these rare and endangered plants in China.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-03-30 Cooperative journals: 《广西植物》
Abstract： Plant taxonomy is an ancient science and its development has also been profoundly affected by social changes. The development history of plant taxonomy in China is briefly reviewed and summarized here. According to the people’s understanding of plant taxonomy and major historical events, the development history of plant taxonomy in China can be roughly divided into the primitive stage, the ancient stage, the modern stage, and the contemporary stage. Each stage ais briefly described. Plant specimens are the most basic and important voucher material for plant taxonomy. Therefore, the collection of plant specimens has witnessed the blood, sweat, tears, and even the lives of plant collectors, during the development of plant taxonomic research in China. At present, the protection of plant resources and the collection and preservation of germplasm resources are increasingly becoming the main task of the ecological civilization construction in China. Under the circumstance of biodiversity conservation in this new era, plant taxonomy and taxonomists will play a much important role and provide strong support for biodiversity conservation in China.
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