- phellogen
[phellogen 词源字典]
- "The layer of meristematic cells from which phellem is formed; the cork cambium", Late 19th cent.; earliest use found in Alfred Bennett (1833–1902), botanist and publisher. From German Phellogen from phello- (in Phelloderma) + -gen.[phellogen etymology, phellogen origin, 英语词源]