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Spur (botany)
A spur in botany is a spike, usually part of a flower.
In certain plants, part of a sepal or petal develops into an elongated hollow spike extending behind the flower, containing nectar which is sucked by long-tongued animals (insects, birds or bats). Plants with such structures include ''Delphinium'', ''Aquilegia'', ''Piperia'', and some orchids, such as ''Gymnadenia''. Spurs may be useful in species identification – for example Yadon's piperia cannot be easily distinguished from other ''Piperia'' save for the unusually short length of its spur.〔Morgan & Ackerman, Lindleyana 5:205–211 (1990)〕
In tropical pitcher plants of the genus ''Nepenthes'', the spur is a small appendage at the base of the pitcher lid.〔Clarke, C.M. 1997. ''Nepenthes of Borneo''. Natural History Publications (Borneo), Kota Kinabalu.〕
== References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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