The use of scented traps for prey attraction has been reported from a few genera of carnivorous plants: most prominently in the pitcher plant genera, where a sweet honey- or fruit-like scent is detectable to the human nose from the pitchers of some populations of Sarracenia flava, S. alata, S. rubra, S. oreophila, S. leucophylla, and S. minor (Miles et al. 1975; Slack 1979; Juniper et al. 1989; Jürgens et al. 2009; pers. obs.), certain species of Heliamphora (a sweet, honey-like scent is produced from the nectar-spoons of H. tatei, H. neblinae, and H. chimantensis, while the pitchers of H. sarracenioides produce a notable chocolate-like odor when growing under natural or favorable conditions; Fleischmann & McPherson 2010), and the pitchers of some species of Nepenthes (e.g. N. rafflesiana; Moran 1996; Di Giusto et al. 2008). Interestingly, the Venus Flytrap Dionaea also has been discovered to attract prey to its traps not only by the vivid coloration, but also by producing scented volatiles (Kreuzwieser et al. 2014).
Keywords: trap scent, prey attraction, prey analysis, Lepidoptera, ecology, Drosera fragrans, Drosera finlaysoniana, Drosera slackii
Andreas Fleischmann. 2016. Olfactory prey attraction in Drosera?. Carniv. Pl. Newslett. 45(1):19-25.
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