This genus contains over 200 succulent perennial and monocarpic plants from desert and mountainous regions. Flowering can take up to 10 years for smaller species (30 cm) and between 20-40 years for taller species (5 m). Flower spikes form from the centre, bearing funnel shaped bright flowers on leafless stems in clusters. Getting the conditions right for flowering when grown as a houseplant can be tricky, and rosettes only flower once before dying. Their leaves are distinctly rigid, sword shaped and toothed on the edges with sharp spikes which enlarge as the plant grows.
North, Central, and South America