Taproot a persistent primary root that grows vertically downward. Swollen taproots used for food storage are common in many biennialplants, such as carrot (Daucus carota).
垂直向下生长的宿存主根。两年生的植物常具有可以储存养料的肥大直根,如:胡萝卜。
2
Biennial to perennial, single or occasionally offsetting rosette plants.
两年生植物,通常独生,有时生侧芽。
3
His is a biennial, and one of the most useful pasture plants we have.