( J. planifolia.) 
BRITISH JUNGERMANNLE. 
The remarkable insertion and direction of the leaves so well distinguish the present from every 
known British species of Jungermannia, that it would be superfluous to say any thing more upon 
the subject, were it not for the great similarity which it bears at first sight to J. nemorosa. My 
acute friend. Dr. Taylor, first pointed out to me the real structure of the leaves, and ascertained 
them to be totally different from those of the species that belong to the section of the genus, “ foliis 
inaqualiter bilobis," the apparent lobe and lobule being in reality distinct leaves, as well in regard 
to their insertion, as to their figure ; and in both respects bearing no inconsiderable resemblance to 
the Hookeria quadrifaria of Dr. Smith. 
Mr. Donn first discovered this species, intermixed with J. Donniana. 
REFERENCES TO THE PLATE. 
FIG. 
1. J ■ planifolia, natural size. 
2. Portion of the same, magnified 
3. Posterior view of a portion of the stem and leaves 
4. Anterior view of a portion of the stem and leaves 
5. Portion of the leaf 
