Notes For Reference:-　

Species, Varieties, or Forms in the Genus Heracleum :

Heracleum nipponicum / Hanaudo
　

Heracleum nipponicum / Hanaudo　ハナウド

Heracleum nipponicum is a perennial herb occurring in damp places on riversides; stems are thick, hollow, hairy, erect, and branch at the upper parts. Leaves are of a ternate compound or mono-pinnate compound leaf; leaflets are cleft, shallow, or intermediate, with margins coarsely serrated. Petioles swell at bases as if enclosed in sheaths. Stem or branch tips create prominently large compound umbels that grow 20cm in diameter. Flowers, 5-petaled, are white; the petals in the peripheral part of the flowers are different in shape from those in the central portion - one of the outer petals is significantly large and cleft in two. Bloom time: May-June.