Biennalis
/by-en-AH-lis/🏷️ Taxonomy●● Intermediate
Also known as: biennale
A growth habit epithet indicating the plant requires two years — growing vegetatively in the first year, flowering and dying in the second. Appears as biennalis (both genders).
Etymology
From Latin biennalis, meaning "lasting two years," from bi- (two) + annus (year).
Example
“Verbascum thapsus (great mullein) and Dipsacus fullonum (teasel) are classic biennials — first-year rosettes followed by towering second-year flower spikes.”