Armatocereus matucanensis is a species of Armatocereus from Ecuador and Peru.
Description
Armatocereus matucanensis grows like a tree, branches out from the base in particular and reaches heights of growth of up to 6 metres. A strong trunk is usually formed. The upright, often lump-forming, grey-green, bluish-tinted shoots are divided into 30 to 50 centimeter long segments with a diameter of 7 to 13 centimeters. There are five to eight ribs separated by shallow furrows. The primrose, angular, flattened and slightly twisted brown spines later turn gray and have a darker tip. The one to four central spines have a length of three to seven centimeters. The 8 to 14 spread radial spines are 5 to 15 millimeters long.
The narrow, funnel-shaped, white flowers stand out horizontally or are erect. They are up to 10 centimeters long and have a diameter of 6 centimeters. The ovoid fruits are green. They are 8 to 13 centimeters long.
Distribution
Armatocereus matucanensis is found in Ecuador in the province of Loja and the Peruvian region of Lima.
Taxonomy
The first description was in 1938 by Arthur William Hill. A nomenclature synonym is Lemaireocereus matucanensis (Backeb. ex A.W.Hill) W.T.Marshall (1941).