Morphological study on the leaf structures of Potentilla in Northeastern China and its taxonomic value (Rosaceae)

doi:10.11686/cyxb20140308

Abstract

Abstract: The leaf structures of 23 species of Potentilla in Northeastern China were studied by the GMA method for the first time. The stipules varied in shape, including lanceolate, lanceolate-ovate, oval and lobate. The petioles in transverse section were usually heart-shaped, but could also be U-shaped, triangular or nearly round, and they usually had 3 vascular bundles. Glandular or nonglandular hairs were present on the epidermis of leaves. Stomata of the anomocytic type mainly occured on the lower epidermis. The phloem fibres were widely present in the taxa studied. The two woody species (Potentilla fruticosa and P. glabra) share many features with herbaceous plants, e.g. trichome type, number and structure of vascular bundles. Our study supports the placement of the two woody species in the genus Potentilla and provides morphological evidence for further taxonomic study of the genus and also provides morphological data for further study of Potentilla in China and in the Rosaceae.

CLC Number:

Q944

SUN Tian-hang,LIU Mei,SUN Xue-qin,CHENG Xin-yu,RU Jian. Morphological study on the leaf structures of Potentilla in Northeastern China and its taxonomic value (Rosaceae)[J]. Acta Prataculturae Sinica, 2014, 23(3): 75-84.

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