2014•Xi'nan nongye xuebaoRequires access

Seed Micromorphology of 9 Species of Cynanchum( Asclepiadaceae)

Hong Wen-ju

Abstract

Seed morphology characters of 9 species of Cynanchum Linn. were observed under stereoscope and environmental scanning electron microscope( ESEM). The results showed that the seeds of Cynanchum had some differences in shape,size and epidermal ornamentation among species. Seeds of Cynanchum Sect. Vincetoxicum were relative consistency in appearance,size and epidermal ornamentation. Seed ornamentation characteristics in Cynanchum Sect. Endotropis were significantly different. The seed surface of C. auriculatum presents immersed rumination,irregular mesh and that of C. giraldii immersed reticulation with more regular mesh. These results supported the treatment of C. Sect. Vincetoxicum in Flora reipublicae Popularis sinicae( Vol. 63).

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Key concepts: Botany, Biology, Environmental scanning electron microscope, Scanning electron microscope, Materials science, Composite material