Does anyone know how long the terms "caulescent" and "acaulescent"
have been in use, and if their is a reference I can point to where
they were first used? They refer to whether or not a plant has a
visible stem. For example, trees are considered caulescent because of
their prominent trunks, whereas some (but not all ) shrubs are
acaulescent, with their stems being underground.

Thanks,
Hos