Breeding systems and relationships among species ofBoykiniaand related genera (Saxifragaceae)

摘要

Self- and cross-pollinations were made within and between selected species belonging toBoykinia,Peltoboykinia,Bolandra,Suksdorfia,Sullivantia, andJepsonia(Saxifragaceae). Self-incompatibility is reported for the first time inBoykinia. No intergeneric hybrids were produced, supporting the separate integrities of the genera involved, particularly the segregation ofPeltoboykinia. Intrageneric hybrids were made inBoykiniaandPeltoboykinia. In the case ofBoykinia, this supports the retention within it of the often segregatedTelesonix. Crosses between the two North AmericanSuksdorfiaspecies failed, but for various reasons, this was taken to reflect the existence of two "biological species" rather than two separate genera.