Hybrids between Allium fistulosum (2n = 16), the Japanese bunching onion, and A. roylei (2n = 16), a wild species from the Himalayas, were vigorous and intermediate to the parents in leaf diameter, flower form, flower color, and time of flowering. Only one germinative seed was obtained from pollinating about 11,500 F1 flowers, and less than 30% of the pollen grains stained normally in acetocarmine. Although chromosome pairing in the hybrid PMCs commonly reached the maximum of 8 II, meiotic irregularities were moderately frequent.