Othonna quinquedentata may reach maturity as proven by a tall inflorescence also when branching as little as the plant in picture.
The young fynbos veld is still short here after a fairly recent fire. The O. quinquedentata suffrutex is in command of a developed root system for quick growth compared to seedlings starting off from first life after fire. It does wonders for this competitor in the race for height. About like an undetected false start in a short distance footrace. Many may think the species is too obsessed with height, given the demands of its environment. Its height will count for something when the veld doesn't burn and all get tall.
Not that the wispy O. quinquedentata body begrudges its neighbours access to sunlight. Unlike Diogenes who wanted from Alexander only to remove his shadow so the philosopher could continue sunning himself, the neighbours will not complain about a shadow here, especially when the wind blows.
The ancient Greeks never told us what they used as sunblock. Maybe the hole in the ozone layer created the demand for such a product only when life received the plethora of solutions for problems created by earlier solutions.