The Boophone disticha blue-green leaves may also remain fairly straight, radiating up in its wavy or flat fan over the bulb.
This very variable species may present curved, undulating and straight leaves, that also vary in width and length. Considered as one unitary species across its widespread and diverse geographical challenges, the plant has mastered them all in slightly different ways in different regions.
The species may well be subdivided taxonomically one day by future generations of botanists if the plant's diversifying trends continue. Speciation is an inexorable process where species spread into differing sets of survival challenges.
The truncated leaf-tips in picture are not an evolutionary modification, merely the result of recent fire that also blackened the outside of the bulb (Duncan, et al, 2016; Vlok and Schutte-Vlok, 2015; Pooley, 1998).