Jack Dykinga / Quiver trees (Aloe dichotoma) at sunset, Namib Desert, Namibia.

Wim van den Heever / Quiver tree (Aloe dichotoma) with the Milky Way at night, and light pollution from town in the distance, Keetmanshoop, Namibia. Colours accentuated digitally.

Hougaard Malan / Aloes below the snow-capped peaks of the Swartberg. Near Calitzdorp, Western Cape, South Africa. June 2009.

Hougaard Malan / Quiver tree with sociable weaver (Philetairus socius) nest in morning light. Quiver Tree Forest, Keetmanshoop, Namibia. March 2011.

Hougaard Malan / Flowering aloes with cathedral rock beyond. Pondoland, Eastern Cape, South Africa. June 2012.

Andrew Parkinson / Quiver tree {Aloe dichotoma} view up through canopy Namib-Naukluft NP, Namibia 2004

Andrew Parkinson / Quiver tree {Aloe dichotoma} at dawn with sun rising Naukluft NP, Namibia

Rhonda Klevansky / Spiral aloe, (Aloe polyphilla), Lesotho. August.

Rhonda Klevansky / Spiral aloe, (Aloe polyphilla), Lesotho. August.

Rhonda Klevansky / Spiral aloe, (Aloe polyphilla), Lesotho. August.

Tony Phelps / Bitter aloes (Aloe ferox) Little karoo, Western Cape, South Africa, July.

Tony Phelps / Bitter aloes (Aloe ferox) flowering, Little Karoo, Western Cape, South Africa, July.