obovate

形容词 obovate:

1. of a leaf shape; egg-shaped with the narrower end at the base

ob.o.vate

adj.Botany （形容词）【植物学】
Egg-shaped and flat, with the narrow end attached to the stalk:
倒卵形的：卵形的、扁平、狭窄的尾部与茎相连：
例句：
an obovate leaf.
倒卵球形的叶