PHOTO CREDITS

ALAMY: 112 top (Universal Images Group North America LLC/DeAgostini), 119 top (National Geographic Creative), 180 bottom (Florapix), 195 top (Alan Gregg), 197 bottom (Alan Gregg)

ALTMAN PLANTS: 92–93, 139 bottom, 174 top

BOB REIDMULLER: 102, 104 top, 106 bottom, 120, 126, 132, 134, 138 top, 144 both, 148, 162 bottom, 168 top, 191 bottom, 198 both

C. T. JOHANSSON/WIKIMEDIA: 116 bottom

DAKE~COMMONSWIKI/WIKIMEDIA: 179 bottom

SHUTTERSTOCK: 1, 23 top, 27, 48 bottom right, 101, 170 bottom, 172 top, 192 top row and bottom right, 196 bottom, 202