Shrubby mullein is found only among the ruins of the ancient city of Termessus in Antalya, southern Turkey.
The stunning blue vanda is responsible for the dramatic blues and purples seen in many cultivated vanda orchids.
Vallea stipularis is a beautiful, evergreen, South American shrub with masses of pinkish-red or crimson, bell-shaped flowers.
Weldenia candida grows naturally on volcanic slopes and craters, and was first introduced to cultivation in 1893.
Yellowhorn is a very attractive bush, or small tree, bearing sprays of elegant white flowers on bare branches in May or June.
Bulbophyllum macranthum is an epiphytic orchid from southeast Asia, with long, creeping rhizomes and large, sweetly-scented, fly-pollinated flowers.
A shrub or tree, with mulberry-like leaves, paper mulberry is important as a source of fibre for cloth and paper.
Paper birch is a North American tree with waterproof bark used in earlier times to make canoes and tepee covers; its wood is now used commercially for toothpicks and ice lolly sticks.
Kew's Herbarium contains a wreath of folded olive leaves which was found in the sarcophagus of King Tutankhamun and is over 3,300 years old.
Blushing bride is a common houseplant, admired for its contrasting violet flower spikes and red inner leaves.