Sansevieria powellii N.E. Brown

Protologue: Bulletin of Miscellaneous Information Kew 5: 198 (1915).
Subgenus: Paniculatus
Group: Sansevieria powellii
Etymology: This species is named for Mr. Henry Powell, a British agriculturist who was Chief of the Economic Plant Division of Kenya in the early 20th century.
Distribution: This species occurs in eastern Kenya extending into southern Somalia.
Brief Description: This caulescent species spreads by rhizomes, forming dense stands. The stem is erect to a height of greater than 120 cm and a diameter of about 2.5 cm. The leaves are distichous to revolute with the opposing leaves becoming twisted around the stem. The slightly rough leaves are spreading, semicylindrical, 30-69 cm long by about 2.5 cm in diameter and about 1.2 cm thick at the base. The leaves are stiff, have a sharp tip, and are faintly glaucous medium-green becoming dark bluish-green with edge and having a red-brown margin with a white edge. The inflorescence is unbranched and about 46 cm tall with 4 - 6 flowers per cluster.
Similar Species: Sansevieria powellii has similarities to Sansevieria arborescens and S. ascendens, but it is readily distinguished by its more-or-less distichous arrangement of leaves and their darker green color. It has been suggested, but not confirmed, that this is a natural hybrid between Sansevieria arborescens and S. robusta. Sansevieria disticha resembles some forms of S. powellii but with shorter leaves.
 
 


Sansevieria powellii near the intersection of Mackinnon Road and the Mombassa Highway in Kenya. This site is near the type locality, which no longer has undisturbed vegetation.
 


Sansevieria powellii (WY 1065) in cultivation, propagated from material originally collected near Mwembeni Station, Kenya.
 


Sansevieria powellii, a form attributed to the late Horst Pfennig with no collection data.