fleshy leaves nature plant pointed sharp spiny succulent garden green halophyte natural rosette spotted stone wall xerophyte xerophytic autumn background Castanea England english fall fruits Great Britain leaf spikey spiky spiney Sussex sweet chestnut tree abstract Australian black boy brown bush bushland descending dried dry fronds grass tree hanging layered layers lines outback remainder slow-growing spiny leaves strands texture unusual vegetation Xanthorrhoea arching evergreen flowering fragrant resin spike stout trunk Xanthorrhoea preissii case chestnut edible fruit nut Prickly seed shell spines appearance light standing straight sunlight upright wallpaper