sentences:  The composite flower heads, known as inflorescences, grow from the ends of stems and give off an onion-like smell.Each has 70 to 95 individual small flowers, arranged in a shape reminiscent of a shaving brush.Robert Brown described the species "Dryandra nervosa" in Robert Sweet's 1827 work "Flora Australasica", from a plant grown from seed by nurseryman John Bain Mackay at his premises in Clapton.