papilionaceous

詳細解釋：

pa.pil.i.o.na.ceous

adj.（形容詞）
Having a bilaterally symmetrical corolla somewhat resembling a butterfly, characteristic of most plants of the pea family.
有蝶形花冠的，蝶形的：有蝴蝶似的左右對稱花冠的，是大部分豆科植物所具有的特點

來源：
Latin p3piliô p3piliôn- [butterfly] * see pavilion
拉丁語 p3piliô p3piliôn- [蝴蝶] *參見 pavilion
-aceous
-aceous