DownComment IconEmail IconFacebook IconGoogle Plus IconGrid IconInstagram IconLinkedin IconList IconMenu IconMinus IconPinterest IconPlus IconRss IconSave IconSearch IconShare IconShopping Cart IconSpeech BubbleSnapchat IconTumblr IconTwitter IconWhatsapp IconYoutube Icon

Rhizome

This kind of bulb does not always grow entirely below the ground

A rhizome is actually a thickened stem growing partially or entirely below ground. Roots grow directly from its underside. The primary growing point is at one end of the rhizome; additional growing points form along its sides. Bearded iris is probably the best-known rhizomatous plant; others are calla lily (Zantedeschia) and canna.

New plants are produced from the growing points, so a planting that starts with a single rhizome can spread horizontally into the surrounding soil.