Rev. T. Salwey on the Cryptogamic Flora of Guernsey. 23 



meagre specimeus of Sticta pulmonaria are also without apo- 

 thecia. The abundance of their orchards led me to expect that 

 I should discover here the Parmelia chrysophihalma which is 

 found in the south of England; but my researches failed in dis- 

 covering more than a single specimen of this plant in an orchard 

 in Sark. ]\Iy friend IMr. Lukis some years ago once found also 

 a single specimen of the same plant in the northern part of 

 Guernsey. This island however possesses much to interest the 

 lichenist from more northern regions. He will find here abun- 

 dance of the RocceUa tinctoria, and will also meet with Lecanora 

 milvina, Lecidea Salveii, Parmelia leucomelas, Sticta aurata, and 

 Porina pustulata of Ach., — a plant hitherto a stranger to our 

 British flora. 



In the minute epiphyllous fungi the island is more prolific 

 than I have found any locality of the same extent in England — ■ 

 some few species are in extreme abundance and very fine, as the 

 Puccinia Cotyledonis and JEcidium Bunii — the Dothidea rubra 

 also is much more highly developed than I ever found it in En- 

 gland, thus showing the influence of a southern climate on this 

 class of plants. There was one circumstance however with re- 

 spect to this tribe of plants which much struck me. In Shrop- 

 shire and Herefordshire, as well as in Wales, it is perhaps not 

 possible to find a sycamore-tree of which the leaves are not 

 blackened with numerous specimens of the Rhytisma acerinum'; 

 whilst in Guernsey I could not even detect a single specimen, 

 although I examined every tree I met with after my attention 

 was attracted by this circumstance. The leaves of every sycamore- 

 tree in the island are as perfectly free from this discolouring epi- 

 phyte as those of the plane-tree. One or two of the Uredines 

 which I have sent to Mr. Berkeley he thinks may prove to be 

 new species. Amongst this tribe of plants he has already named 

 as new the Depazea Caricce on the leaves of the common fig-tree, 

 and the Ustilago Salveii on young plants of Dactylon glomeratus. 



The richest part of the cryptogamic flora of Guernsey will 

 doubtless be found in the marine Algre. Were any one well ac- 

 quainted with this department of botany to be long resident here, 

 I feel little doubt that some interesting discoveries might be 

 made. The few opportunities I have had of studying them from 

 short and occasional visits to the sea -coast, and this in only one 

 or two localities, have given me little opportunity of becoming- 

 much acquainted with this branch of botany; whilst during 

 the time of my residence in this island, the state of ray health 

 confined me so much to the house, that my botanical researches 

 in every branch were greatly interrupted. The list therefore 

 which I have sent you is only to be considered as " contribu- 

 tions '' towards the cryptogamic flora of Guernsey, of which it is 



