Claudio Contreras / Firewheel (Gaillardia pulchella) flowers at twilight, Laredo Borderlands, Texas, USA. April

Alex Hyde / Porcelain fungus (Oudemansiella mucida) gills. Peak District National Park, Derbyshire, UK. October.

Sven Zacek / Hepatica (Hepatica nobilis) white morph and normal blue morph, Southern Estonia, April.

Juergen Freund / Gorgonian fan coral (Gorgonaceae) in the shallow mangroves, split level. North Raja Ampat, West Papua, Indonesia. Second Place in the Portfolio Award of the Terre Sauvage Nature Images Awards Competit...

Juergen Freund / Split level view of coral reef, Komodo National Park, Flores, Lesser Sunda Islands, Indonesia. Second Place in the Portfolio Award of the Terre Sauvage Nature Images Awards Competition 2015.

Kirkendall-Spring / Oak trees (Quercus) in the fog, Figueroa Mountain, Los Padres National Forest, California, USA.

Staffan Widstrand / Moss covered fallen trees in old mixed conifer and broadleaf forest, Punia Forest Reserve, Lithuania, May.

Chris Mattison / Lichen (Nephroma antarctica) Rio Serrano, Chile. Focus stacked image.

Gabriel Rojo / Close up of Passionflower (Passiflora caerulea) La Pampa, Argentina.

Enrique Lopez-Tapia / Giant lobelia (Lobelia rhynchopetalum) plants in mist, Sanetti Plateau, Bale Mountains National Park. Ethiopia, November 2014

Enrique Lopez-Tapia / Giant lobelia (Lobelia rhynchopetalum), . Sanetti Plateau, Bale Mountains National Park. Ethiopia, November 2014

Georgette Douwma / Stove-pipe sponge (Aplysina archeri) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.