Gladiolus communis subsp. byzantinus
Gladiolus byzantinus, Mill. Fls. more and larger, plant more robust than in No. 10, segms. more spreading at maturity, although the 3 upper ones are contiguous, dark purple, the 3 lower ones with a prominent white median line: seeds winged. Medit. region. B.M. 874.— Hardy; little known in gardens.