PLATE 



COLOURED ILLUSTRATIONS 



I. Old Man's Beard, Usnea barbata, (L.) Fr Frontispiece 



FACING PAGE 



II. Yellow Wall-lichen, Thelochistes parietimts,(L.} Norm. 4 



III. Hypnum uncinatum Hedw. . 24 

 Golden Cord Moss ... ... 24 



Georgia pellucida, Rabenh. . .... 24 



Neckera pennata, Hedw. . .... 24 



Sphagnum cymbifolium, Ehrh. . . . . 24 



IV. Ceratodon purpureum, Brid 42 



Caiharinea angustata, Brid 42 



Climadum dendroides, Web. & Mohr .... 42 



Pogonatum brevicaule, Beauv . . 42 



V. Parmelia eonspersa, (Ehrh.) Ach. 58 



VI. A Forest Boulder ... 70 

 VII. Iceland Moss, Cetraria Islandica, (L.) Ach. 



Sticta pulmonaria, Ach 



Sticta amplissima, (Scop.) Mass. . 



The Dog Peltigera, Peltigera canina, (L.) HofYm. 



VIII. Reindeer Lichen and variety 



Reindeer Lichen, variety Alpestris 



10 

 10 

 10 

 10 



3 

 30 

 Reindeer Lichen, Cladonia rangiferina, (L.) Hoffm. . 130 



Physcia leucomela, (L.) Michx 130 



IX. Wood Path . . 152 



X. Hairy-cap Moss, Polytrichum commune, L. . . .162 



XI. Umbilicaria vellea, (L.) Nyl. 174 



Rock Tripe, Umbilicaria Muhlenbergii, (Ach.) 

 Tuckerm 174 



XII. Scarlet-crested Cladonia, Cladonia cristatella, Tuckerm. 1 84 

 Brown-fruited Cup Cladonia, Cladonia pyxidata, 



(L.) Fr. 184 



XIII. A Thalloid Hepatic, Marcbantia polymorpba, L. . 204 



XV 



