> as lemmas

1863 Trans. Bot. Soc. Edinb. 7 550 It..remains to be seen, whether or not the microscope can reveal any change in the minute structure of the genitalia of such absolutely self-impotent individuals, in a comparative examination with others of the same species perfectly self-fertile.

1917 Genetics 2 509 E. Bernet, of Antibes, a man having a wide experience in crossing species of Cistus, found that their hybrids when fertile..were completely self-impotent.

1993 Age (Melbourne) (Nexis) 11 Aug. 5 About half of the flowering plants are self-impotent. The stigma and male organs, which are called anthers and carry pollen, often are close enough together to breed, but they never do.