The leaves are arranged alternately .
Are flat , not succulent , 17 -- 70 millimetres ( 0.7 -- 3 in ) long and 3.5 -- 13 millimetres ( 0.1 -- 0.5 in ) wide .
The leaves are arranged alternately and are flat , not succulent , 17 -- 70 millimetres ( 0.7 -- 3 in ) long and 3.5 -- 13 millimetres ( 0.1 -- 0.5 in ) wide .