Subgenus Xiphium is one subgenus of Iris, Large smooth-bulbed bulbous irises. Formerly genus 'Xiphion'. The Latin specific epithet Xiphium refers to the Greek word for sword Xiphos. Most bulbs in the subgenus come from south-west Europe (Southern Spain, Portugal and Southern France) and Northern Africa. Mainly known for the hybrids of Dutch Iris, Spanish Iris and English Iris. They generally flower between early to mid-summer and eash stem produces between 1 - 3 flowers.Most bulbs should be planted in late autumn, 10cm deep and between 5-10cm apart. Section Xiphium