from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic order within the class Jungermanniopsida — the leafy liverworts.
from the GNU version of the Collaborative International Dictionary of English
- proper n. A large order of chiefly tropical liverworts.
from The Century Dictionary and Cyclopedia
- An order of cryptogamic plants of the class Hepaticæ, coextensive with the family Jungermanniaceæ, and therefore including both the anacrogynous and the acrogynous scalemosses.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. large order of chiefly tropical liverworts
The lower members of the Jungermanniales are also thalloid, but the thallus never has the complicated structure characteristic of the Marchantiales, and progress is in the direction of the differentiation of the plant into stem and leaf.
The Marchantiales form an obviously natural evolutionary group, and the same is probably true of the Jungermanniales, although in neither case can the partial lines of progression within the main groups be said to be quite clear.