Air plants (Tillandsia spp.) are epiphytes, which means they grow on other plants, usually tree branches, in nature. Air plants come in hundreds of different species and varieties. They typically have strap-shaped or slender triangle-shaped leaves that form a rosette pattern with new growth emerging from the centre. Those with silver foliage are the most drought-tolerant; those with green foliage dry out faster. There are also colourful species, such as Tillandsia maxima, which has coral leaves. Most species also have lovely tubular or funnel-shaped flowers.