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.
The striking arum lily has been known to European horticulture since at least the 1660s and is one of the world's most iconic and widely known plants.
Sunflower is a beautiful and nutritious plant widely cultivated for its edible seeds and oil.
A vine from the morning glory family (Convolvulaceae), sweet potato is widely cultivated for its edible root tubers.
White ash is a rapidly growing timber tree native to eastern North America. Its shock-resistant timber is used for tool handles and baseball bats.
Red oak is a North American tree with spectacular reddish brown leaves in autumn.
Santa Cruz waterlily has strikingly beautiful lily pads up to two metres wide, with prickly undersides and wide, upturned rims.
The titan arum is a giant among plants, with a massive flowering structure that rises some three metres above the ground. Its flowering is rare and unpredictable, and always grabs the headlines.
Lilyturf is a clump-forming perennial native to Japan, a dark-leaved cultivar of which is popular as an ornamental.