The New Student's Reference Work/Columella
Columel′la (in plants), an axis of sterile tissue which passes through the center of the spore-case of mosses. See Musci.
See also Columella (botany) on Wikipedia, and the disclaimer.
Columel′la (in plants), an axis of sterile tissue which passes through the center of the spore-case of mosses. See Musci.