caudex

名词 caudex:

1. persistent thickened stem of a herbaceous perennial plant
   同义词：stock
2. woody stem of palms and tree ferns

cau.dex

n.（名词）
【复数】 cau.di.ces[-d-sôz.] 或 cau.dex.es
The thickened, usually underground base of the stem of many perennial herbaceous plants, from which new leaves and flowering stems arise.
茎基：多年生草本植物的，通常在地下的粗大茎基，从中生出新叶和花茎
The trunk of a palm or tree fern.
棕榈树或树蕨的树干

来源：
Latin caudex [tree trunk]
拉丁语 caudex [树干]