The same mode of increase occurs in the gladiolus and crocus, but their bulb-like permanent parts are called corms, not bulbs.
The members of this order are generally perennial herbs growing from a corm as in Crocus and Gladiolus, or a rhizome as in Iris; more rarely, as in the Spanish iris, from a bulb.
The most important genera are Crocus (q.v.), with about 70 species, Iris (q.v.), with about ioo, and Gladiolus (q.v.), with 150.
Foetidissima (stinking iris), Gladiolus communis, a rare plant found in the New Forest and the Isle of Wight, and Romulea Columnae, a small plant with narrow recurved leaves a few inches long and a short scape bearing one or more small regular funnel-shaped flowers, which occurs at Dawlish in Devonshire.
Few bulbs come into the summer flower gardens, but amongst those which should always be well represented are the Gladiolus, the Lilium, the Tigridia and the Montbretia.
Gladiolus byzantinus, Mill.