Mr. W. Mitten on the Mosses and Hepatica of Sussex. 365 



iato pulcherrime aurantiaco vel purpureo nitido." — C. Muller, 

 Synops. p. 253 [sub B. canariense']. 



B. Billardierii, Bryol. Europ. Bryum, t. 46. 



B. canariense, Schw. Suppt. t. 204. 



B. campylothecium, Tayl. Lond. Journ. Bot. 1846, p. 52. 



On Woolsonbury Hill near Hurstpierpoint : very rare and sterile. 



Stems in the specimens from the above locality abont half an inch 

 high, loosely csespitose ; leaves collected together at the tops of the 

 stems, bright green, erecto-patent, ovate and ovate-acuminate, with- 

 out a thickened margin, towards the apex dentate, the nerve excur- 

 rent, and above the apex of the leaf bent slightly backwards. 



After a comparison of the specimens from Woolsonbury Hill with 

 others from the Canaries, the Cape of Good Hope, New Zealand, 

 Australia, and the Falkland Islands, it appears that there is no essen- 

 tial difference between B. Billardierii, B. canariense, and B. campy- 

 lothecium. In the forms named B. Billardierii and B. campylothe- 

 cium, the leaves are wider above than in the form named J?, canariense ; 

 but the size and form of the cells, the reflexed lower margins, and 

 denticulate apices are precisely the same in both. Schwaegrichen has 

 figured and described the internal peristorne^ojf B. canariense with 

 short and imperfect cilia, which might arise from immature specimens 

 having been examined. 



The B. campylothecium of Taylor, collected by Mr. J. Drummond 

 at Swan River, differs from the usual forms of B. Billardierii only in 

 having more boat-shaped leaves, and in this respect is analogous to 

 similar forms of B. capillare. 



Very similar as many species of Bryum are in a barren state to the 

 unpractised eye, B. Billardierii however presents at once a character 

 by which it may be readily known, in the denticulate apices of the 

 leaves. 



No dependence ought to be placed on the relative width of the 

 margin as a distinctive character in species of this genus, for in some 

 species, as B. capillare, it may be observed to vary from one that is 

 almost imperceptible to one that almost equals that present in some 

 Mnia. 



133. B. Donianum, Greville, Transact, of the Linnsean Soc. 

 xv. ii. p. 345. t. 3. f. 6; "habitus B. capillaris ; folia caulina 

 oblongo-ovata lata acuminata viridissima, margine crasse et flavo 

 limbata remote denticulata, nervo crasso flavo excedente crasso- 

 mucronata ; perichsetialia interna multo angustiora minora mar- 

 gine valde revoluta ; theca in pedunculo longiusculo purpuras- 

 cente apice arcuata elongato-cylindrica ore coarctata fusca, oper- 

 culo conico acuto concolori nitido." — C. Muller, Synops. p. 282. 

 sub nom. B. platylomatis, Schw. 



B. platyloma, B. et S. Bryol. Europ. Bryum, t. 26. 

 B. Mulleri, Spruce in Muse. Pyren. No. 138. 



Frequent on hedge-banks in sandy soils. The fruit was first gathered 



