Aloe pillansii is a synonym

Synonym

Synonyms are different words with almost identical or similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn and onoma . The words car and automobile are synonyms...

 of Aloe dichotoma

Aloe dichotoma

Aloe dichotoma, also known as Quiver tree or Kokerboom, is a species of aloe indigenous to Southern Africa, specifically in the Northern Cape region, and Namibia....

subsp. pillansii, also called Giant Quiver Tree or Bastard Quiver Tree. It is regarded as critically endangered

Critically endangered

Version 2010.3 of the IUCN Red List of Threatened Species identified 3744 Critically Endangered species, subspecies and varieties, stocks and subpopulations.Critically Endangered by kingdom:*1993 Animalia*2 Fungi*1745 Plantae*4 Protista-References:...

.

This aloe grows up to 15 meters in height and is found around the border between Namibia

Namibia

Namibia, officially the Republic of Namibia , is a country in southern Africa whose western border is the Atlantic Ocean. It shares land borders with Angola and Zambia to the north, Botswana to the east and South Africa to the south and east. It gained independence from South Africa on 21 March...

 and South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

, where its natural habitat

Habitat

* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

 is dry subtropical or tropical shrubland

Shrubland

Shrubland, scrubland, scrub or brush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity...

. It is severely threatened by habitat loss.

See the Aloe dichotoma

Aloe dichotoma

Aloe dichotoma, also known as Quiver tree or Kokerboom, is a species of aloe indigenous to Southern Africa, specifically in the Northern Cape region, and Namibia....

article for further information, including the distinction between A. dichotoma var. pillansii and the other subspecies.