(J. Danniana.) 
BRITISH JUNGERMANNIyE. 
falcato-secund (f. 2). The texture of the leaf is rather firm, brittle when dry: the 
cellules are very compact, extremely small, ovate or oblong, and may often be ob- 
served to be arranged in longitudinal series ; many of the cellules are opaque, whilst 
others are semi-pellucid, as is represented at f. 6. Their color is rather a deep, pur- 
plish-brown ; at the base of the plant, of a dirty hue. 
Mr. George Donn, of Forfar, communicated specimens of this plant, which he gathered 
in 1795, both in the Clova and the Breadalbane mountains, to Dr. Smith, a few years since,' 
marked « J. adunca of Dickson (the J. juniperina of Swartz and this work). On its being 
ascertained to be a new species, my kind friend, Mr. Lyell, applied to Mr. Donn for other 
specimens, which he had been so fortunate as to gather on another of the Scotch mountains, 
in 1802, and be has subsequently informed me of two new stations for this plant, detected in 
September, 1813. It is a species the most distinct of any I am acquainted with, and, among 
the British Jungermanniae, is perfectly “ sui generis;” though, in mode of growth, and in the 
disposition of the leaves, some kind of affinity may be observed with J. juniperina. In the 
shape of the leaves, as well as in their direction, it bears a nearer approach to a large, and, 
I believe, undescribed species found at St. Helena ; but, besides the much smaller size of 
the former, the color of the two are totally different. Of our present plant, unfortunately, 
no fructification has yet been met with. It appears to be confined to a few of the loftiest of 
the highland mountains, and, even in these situations, has only been seen by its discoverer, 
whose name it bears, and wlio has contributed so much by his indefatigable industry to the 
Flora of the British Isles. 
