394 



by the large, flattened, tliree-leaved perichaetium, by the caulme leaves 

 mcreasing in size as they approach the perichsetium, by the skin be- 

 ing less flexuose, by the leaves being more distant, and by the paler 

 colour of the whole plant. 



Dr. Taylor refers to Hooker's * British Jungermannise,' tab. lii. fig. 

 3, as being " a just representation of the stem, leaves, and stipules of 

 J. ulicina ; " and observes, 



" It is remarkable that on the same stems of furze in the above locality, grew every 

 one of the minute tribe to which the present species is allied, viz., J. minutissima, J. 

 hamatifolia, J. calyptrifolia, andJ. serpyllifolia." — p. 116. 



2. Jungermannia Lyoni, (Taylor). Stem ascending, somewhat branched : leaves 

 distichous, alternate, somewhat quadrate, concave, recurved, trifid ; anterior lacinia 

 rounded in front, posterior one reflexed, all acute or terminated by a single large tooth ; 

 stipules none : fruit at length lateral ; calyces oblong, obtuse, inflated, rather naked at 

 the base, mouth fringed and plaited. 



" So great is the force of individual vegetation, that within the calyx, and along- 

 side the pistilla, a bud may sometimes be seen to arise, and at length to emerge out 

 of the calyx, clothed with leaves. Perhaps this viviparous condition of the calyx has 

 not yet been observed in any other species. The plant nearest in natural affinity is 

 probably J. orcadensis, Hook., equally destitute of stipules, having a similar erect, 

 scarcely-branched stem, growing up among tufts of mosses, but differing, 1st, by the 

 leaves being simply emarginated, 2nd, by their margins being recurved, and so assum- 

 ing, when moist, a convex and tumid appearance in front." — p. 117. 



Resembling J. barbata, Schreh. and J. incisa, Schrad., but differing 

 from the former in the presence of stipules, in its more oblong calyx, 

 and in its less concave, subsquarrose leaves, which are also less im- 

 bricated ; and from the latter, in its larger size and ascending stems, 

 in the leaves being anteriorly rounded and entire, with their lower la- 

 cinia reflexed and their cells smaller, in the more tumid and less pli- 

 cate calyx, in its squarrose perichsetial leaves, in the leaves being 

 more distant and paler in colour. 



This species is described at considerable length, and illustrated by 

 figures. 



XVI. Extracts from the Minute-Book of the Botanical Society, from JVo- 

 vember, 1840, to July, 1841. 



1840, December 10. Read, Extracts from a letter addressed to the 

 Secretary, b}' the Rev. T. B. Bell, dated December 3, 1840, contain- 

 ing " Observations on the specific distinctions between Asplenium 

 Ruta-muraria, and A. alternifolium." 



Mr. Bell observes, — " I am aware some botanists have remarked, that attenuated 

 forms of Asplenium Ruta-muraria approach indefinitely near A. alternifolium. I be- 



