Jeff Foott / Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, Wyoming

Jack Dykinga / Hairy bird's foot morning glory (Ipomoea leptotoma) flower over Prickly pair (Opuntia sp) Catalina State Park, near Tucson, Arizona, USA, August.

Shattil & Rozinski / Morning glory {Ipomoea sp} inside flower close-up, USA

Albert Lleal / Common Morning Glory (Ipomoea purpurea) SEM close-up view of pollen at 210x magnification

Jack Dykinga / Morning Glory pool with Lodgepole pines {Pinus contorta} in background, Yellowstone NP, Wyoming, USA

Sue Flood / Morning Glory Pool, Yellowstone National Park, Wyoming, USA

Pete Cairns / Morning glory pool, Old Faithful geyser, Yellowstone NP, Wyoming, USA

Patricio Robles Gil / Cardon (Pachycereus pringlei) cactus and flowering Common Morning Glory (Ipomoea purpurea) vines in the Miquihuana Desert, northeast Mexico

Jim Brandenburg / Morning Glory pool in Upper Geyser Basin, Yellowstone National Park, Wyoming

Nigel Cattlin / Convolvulus hawk moth (Agrius convolvuli) female resting with wings partly open, on damaged leaf. Berkshire, England, UK. October.

Nigel Cattlin / Convolvulus hawk moth (Agrius convolvuli) female resting on damaged leaf. Berkshire, England, UK. October.

Nigel Cattlin / Beach morning glory (Ipomoea pes-caprae) flowers amongst creeping plants. Thailand.