Formally, the issue is that
interfertile "able to interbreed" is not a transitive relation – if A can breed with B, and B can breed with
Kaynak: Ring speciesBoth the wild pears are
interfertile with domesticated pears. It is sometimes difficult to distinguish Pyrus pyraster from a common pear.
Kaynak: Pyrus pyrasterThe two species are
interfertile, and hybrids are common along a line from Dallas to San Antonio . Texas Red Oak usually is 30 to 50 feet
Kaynak: Quercus buckleyiB or D. Grasses sharing the same genome will be more-or-less
interfertile, and might be treated by botanists as one species.
Kaynak: Taxonomy of wheatMars might have a native intelligent race was unlikely, and the possibility that Martians and humans would be
interfertile was even more so. "
Kaynak: Half-Breed (short story)Although it is fully
interfertile with its sister species, Mimulus cardinalis, the two do not interbreed in the wild, a difference
Kaynak: Mimulus lewisiiThe genus Euphrasia is taxonomically complicated due to many species being
interfertile and prone to hybridisation . Despite there having
Kaynak: Euphrasiaaviculture for such birds, and some breed them exclusively; they are of course perfectly
interfertile with individuals of the normal morph however.
Kaynak: Maroon-bellied ParakeetP. caucasica), which are
interfertile with domesticated pears. Archeological evidence shows that pears "were collected from the wild long
Kaynak: European PearReith reads his own fate in Borel's, knowing Terrans and Krishnans are not
interfertile – the latter, while near human in appearance, are
Kaynak: The Hostage of ZirAmerican varieties Aquilegia species are very
interfertile, and will self-sow Some varieties are short-lived so are better treated as biennials .
Kaynak: AquilegiaThe wild antecedent of foxtail millet has been securely identified as Setaria viridis , which is
interfertile with foxtail millet; wild
Kaynak: Foxtail milletMost petunias are diploid with 14 chromosome s and are
interfertile with other petunia species. The tubular flowers are favoured by some
Kaynak: PetuniaHowever, this classification may also be revised since three of the four Macrocystis species are
interfertile(M. laevis ' interfertility
Kaynak: Macrocystissimilar genetically, and are fully
interfertile, but only have very limited ability to form hybrids with other species in the genus Cynara.
Kaynak: Cardooncalled A. blazei and A. brasiliensis were genetically similar to, and
interfertile with, North American populations of Agaricus subrufescens.
Kaynak: Agaricus subrufescens