PJB-2004-75
POLLEN FLORA OF PAKISTAN -XLII. BRASSICACEAE
ANJUM PERVEEN, M. QAISER AND REHANA KHAN*
Abstract
Pollen morphology of 77 species belonging to 36 genera of the family Brassicaceae from Pakistan has been examined by light and scanning electron microscope. Pollen grains are usually radially symmetrical, isopolar sub-prolate to prolate, or prolate-spheroidal rarely oblate-spheroidal, tricolpate rarely 4-8 colpate. Sexine thinner or thicker than nexine. Tectum fine to coarsely reticulate with more or less regular pattern of muri or reticulate - rugulate. On the basis of tectal surface four distinct pollen types are recognized viz., Arabis bijuga-type, Farsetia ramosissima-type, Draba lanceolata -type and Erysimum melicentae - type.
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