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Brittonia

, Volume 33, Issue 4, pp 498–507 | Cite as

Systematic studies in sedum section ternata (Crassulaceae)

  • Patrick J. Calie
Article

Abstract

An investigation of flavonoid compounds, pollen grains, and seed coats of the four taxa of the genusSedum sectionTernata, S. nevii, S. glaucophyllum, S. pulchellum, andS. ternatum, was undertaken to resolve the taxonomic status ofS. glaucophyllum. Flavonoid compounds were tentatively identified utilizing UV spectroscopy and shift reagents. Both flavones and fla vonols, as apigenin, luteolin, quercetin, and kaempferol aglycones and glycosides, were detected. Pollen grains and seed coats were viewed and photographed with the aid of a scanning electron microscope. Pollen grains of all four taxa were uniformly tricolporate; interspecific variation was negligible. Seed coats of all four taxa differed significantly with respect to ornamentation. Phytochemical and morphological data both support the recognition ofS. glaucophyllum as a species distinct from S.nevii.

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Copyright information

© New York Botanical Garden 1981

Authors and Affiliations

  • Patrick J. Calie
    • 1
  1. 1.Department of BotanyUniversity of TennesseeTN

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