Flowering of certain fynbos geophytes has long been noted to have an obligate dependence upon fire. One of these species, Cyrtanthus ventricosus (Jacq.) Willd., is shown here to be stimulated to flower by smoke. Ethylene, a gaseous component of smoke, did not stimulate flowering in this species. Dit is lank reeds bekend dat blomvorming by sekere fynbosgeofiete ’n verpligte afhanklikheid van vuur het. Daar word hier aangetoon dat een van hierdie spesies, Cyrtanthus ventricosus (Jacq.) Willd., deur rook gestimuleer word om te blom. Etileen, ’n gaskomponent van rook, het nie blomvorming by hierdie spesie gestimuleer nie.
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Jon E. Keeley (1993) studied this question.
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