Here are a few images of Xanthorrhoea, the plant featured in the ASBS logo -
(Xanthorrhoea is a genus of monocots in the family Xanthorrhoeaceae. Xanthorrhoea is endemic to Australia and contains about 30 species.)
Xanthorrhoea australis subsp. australis - flowers.
Xanthorrhoea resinosa - habit.
Xanthorrhoea johnsonii - habit.
Xanthorrhoea australis - habit.