Tim Fitzharris / Rhododendron (Rhododendron sp) flowers and Coast Redwood (Sequoia sempervirens) trees in fog, Redwood National Park, California

Jeff Foott / Pacific Rhododendron (Rhododendron macrophyllum) flowering in old growth Coast Redwood (Sequoia sempervirens) forest, Redwood National Park, California

Radomir Jakubowski / Alpine / Trailing Azalea (Kalmia procumbens) growing on a scree slope. Rondane National Park, Norway, September. Winner, Fritz Polking Junior Award portfolio, GDT 2011 Competition.

Aflo / N-15002 Woodland landscape with Birch trees + Azaleas in flower, Nagano, Japan.

Aflo / N-13704 Waterfall in woodland with Azalea trees in flower, Tochigi, Japan.

Aflo / N-13603 River flowing through woodland with Azalea trees in flower, Tochigi, Japan.

Stephen Dalton / Swarm of Green longhorn moths (Adela reaumurella) feeding on on Wood Azalea flowers. UK

Nigel Cattlin / Bud blast (Pycnostyzanus azaleae) disease on Rhododendron (Rhododendron sp) bud. In cultivation, Berkshire, England, UK. June.

Kevin Schafer / Kamchatka Rhododendron (Rhododendron camtschaticum) flowers, Adak Island, Aleutian Islands, Alaska

Nick Garbutt / Alpine rose (Rhododendron ferrugineum) flowering beside mountain stream. North Tyrol, Austria. June.

Nick Garbutt / Alpine rose (Rhododendron ferrugineum) near stream in mountain valley. Fiss, Landeck, North Tyrol, Austria. June 2017.

Heather Angel / Rhododendron (Rhododendron souliei) and Leopard plant (Ligularia sp) on bank of river flowing through forest. South of Kangding, Sichuan Province, China. June.