Abstract
ABSTRACT A comprehensive, microscopic description of feverfew was developed for the accurate botanical identification of the plant (Tanacetum parthenium (L.) Schultz Bip.)- Floral morphologies of the cultivated varieties 'Double-flowered', 'White Stars' and 'White Pompom' were compared with the variety 'aureum' and a wild-type. Cytological observations of root tip squashes of all varieties confirmed the chromosome number as 2n = 18. The wild-type feverfew contained two distinct trichome types, a multicellular, uniseriate non-glandular trichome, with a long, flat and strap-like apical cell and a 10-celled, biseriate glandular trichome observed in large numbers on both the abaxial and adaxial leaf epidermis, in cuticular depressions on the abaxial surface of ray florets, and in vallecular grooves of seeds.
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