Jack Dykinga / Velet-pod mimosa (Mimosa dysocarpa) flowering amongst Blue oak trees (Quercus oblongifolia) Atascosa Mountains, Coronado National Forest, Arizona, USA

Jack Dykinga / Velet-pod mimosa (Mimosa dysocarpa) flowering amongst Blue oak trees (Quercus oblongifolia) Atascosa Mountains, Coronado National Forest, Arizona, USA

Jack Dykinga / Velvet-pod mimosa (Mimosa dysocarpa) flanked by Blue oaks (Quercus oblongifolia) in the grassy foothills of the Atascosa Mountains, Coronado National Forest, Arizona

Adrian Davies / Sensitive plant {Mimosa pudica} with leaves untouched. sequence 1/2

Nigel Cattlin / Sensitivity plant (Mimosa pudica) shown before and after touching the sensitive leaves.

Angelo Gandolfi / Waterfall in the Cerrado. Estancia Mimosa, Bonito, Mato Grosso do Sul, Brazil.

Nick Upton / Sweet acacia / Needle bush (Vachellia farnesiana / Acacia farnesiana) a Central American species invasive in many parts of the world on dry saline soils, growing by the coast, near Nafplio, Argolis, P...

Paul Harcourt Davies / Mimosa tree (Mimosa sp) Umbria, Italy, February.

Loic Poidevin / Von Der Deckeni hornbill (Tockus deckeni) in acacia bush, Samburu National Park, Kenya, September

Loic Poidevin / Red billed hornbill (Tockus erythrorhynchus) Samburu National Park, Kenya, October

Hanne & Jens Eriksen / Gum arabic tree (Acacia nilotica) close-up of flowers created with Helicon Focus, Oman, September

Nick Turner / Milky way and Acacia tree over De Hoop Nature Reserve, Western Cape, Overberg, South Africa. June 2013.