1At a taxonomic level below that of species, e.g. subspecies, variety, cultivar, or form. In botany, Latin names at this level usually require the addition of a term denoting the rank.

1. 1.1 Occurring within a species.
   发生在种内的
   infraspecific variation

   同物种中产生的变异，种内变异。

   Example sentencesExamples

   • At the time of the last revision of the genus, Apios americana Medikus was the only described North American species and none of its six infraspecific taxa had been described.
   • Perhaps Furlow lacked the quantity of data needed to resolve the infraspecific variation that exists.
   • Phylogeny, cytology, ethnobotany, conservation biology, and infraspecific taxa are all reasons why a revision of the North American species of Apios was needed.
   • Thus we considered the number of lateral costae (five or six per shell flank) in S.7 spiriferformis to be within the infraspecific variation of Sinostricklandiella robusta.
   • Several infraspecific taxa have been recognized but the current classification should be regarded as tentative and further studies based on molecular data are needed.
   • Therefore, any conclusions about infraspecific length and repeat variability, possibly also detected in a heteroplasmic state in one individual, have to await further infraspecific studies.