A very characteristic feature of the Male Fern is its stout and sometimes very upright stem or caudex.
Where the stem of the Fern is upright it is properly termed a caudex, whilst in its horizontal form it is spoken of as a rhizome.
Kydia continues; a fine Palm, caudex 8-10-pedali; it probably belongs to the genus Wallichia?
caudex arhorescens cicatricibus basibusve foliorum exasperatus?
The name of a book, caudex, codex, was first given to these tabellae when they were strung together to form a square book.
The striking resemblance of Kingia, in caudex and leaves, to Xanthorrhoea, cannot fail to suggest its affinity to that genus also.
A caudex is the old name for such a peculiar trunk as a Palm-stem; it is also used for an upright and thick rootstock.
caudex arborescens erectus simplicissimus cylindraceus, 6-18-pedes altus, crassitie femoris.