Astri (Aster)
Aster spp., genus of flowering plants in the Asteraceae family. A fascinating piece of trivia about this flower is that the number of petals is a Fibonacci Number, i.e. 0, 1, 1, 2, 3, 5, 8, 13, 21... (Fn = Fn-1 + Fn-2, where F0 = 0 & F1 = 1), a series revealed (although apparently known by Indian mathematicians as far back as 200 BCE) by Leonardo of Pisa, aka Fibonacci (= son [filius] of Bonaccio), in his Liber Abaci (1202) to calculate a theoretical growth in rabbit numbers. The book was also one of the prime movers introducing Arabic numerals, algebra, and the ‘number’ 0 (using it became illegal in 13-14th-C Florence) to Europe. Mathmatophobes, you now have a name to play darts with. See also Kreegi.