Arundo donax English: Giant cane It is a plant similar to bamboo, which is Spanish: Caña común different because each node leaves a single leaf that sheathes the stem. It reaches 3-6 m height, has a thick and hollow stem. They are abundant in the Mediterranean region and middle east Asia. Flowers It flowers in late summer and autumn, but are usually seedless or with seeds that are rarely fertile. It mostly reproduces vegetatively by tough, fibrous underground rhizomes that form knotty, spreading mats which penetrate deep into the soil, up to 1 metre deep. The flowers are in a large panicle of violet or yellow spikes of 3-6 dm in length. Each spikelet have one or two flowers. Leaves The grey-green leaves are alternate, 30 to 60 centimetres long and 2 to 6 centimetres wide with a tapered tip, and have a hairy tuft at the base.