PJB-2024-1515
Palynological investigations of some selected taxa of the tribe Coreopsideae (Asteraceae) from Pakistan and Kashmir and their taxonomic implications
Taba Rauf and Anjum Perveen
Abstract
Palynological characteristics of 9 species belonging to Bidens L., Coreopsis L., and Cosmos Cav., from Pakistan and Kashmir were examined using Light Microscope (LM) and Scanning Electron Microscope (SEM). Pollen grains were usually radially symmetrical, isopolar, Prolate-spheroidal to oblate-spheroidal, rarely sub-prolate in shape, generally tricolporate rarely tetracolporate (Bidens pilosa). Pollen showed a wide range of variation in size and shape. Exine ornamentation was echinate, but variation was found in the ornamentation in between spines such as punctate, rugulate and rarely granulate with microperforated tectum. Spines were long, sharp with pointed tips, perforated, mostly conical in shape with broad or narrow base. Based on the pollen size two pollen types’ viz., Bidens pilosa and Coreopsis tinctoria types are recognized
To Cite this article:
Rauf, T. and A. Perveen. 2024. Palynological investigations of some selected taxa of the tribe Coreopsideae (Asteraceae) from Pakistan and Kashmir and their taxonomic implications. Pak. J. Bot., 56(2): DOI: http://dx.doi.org/10.30848/PJB2024-2(15)
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