TerraForums Venus Flytrap, Nepenthes, Drosera and more talk
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The length of the spur varies enormously between the different mexican Ping species, some like P. laueana and P. hemiepiphytica, for example, have very long spurs. Presumably, the long-spurred Pings are pollinated by long-tongued insects such as certain moths, or by hummingbirds (the red colour of P. laueana also suggests hummingbird pollination).
P. hemiepiphytica
One reason that spur length is so variable, along with flower colour and pattern, is that it probably prevents these species from sharing pollinators between each other, a fact born out by the rarity of natural hybrids, particularly as most species readily hybridise with each other, when performed manually in cultivation.
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