A HISTORY OF DEVONSHIRE 



cirrochroum, and P. xantholytum are amongst the rarer southern species. 

 At Bolt Head, Physcia leucomela and P. speciosa occur. The Graphidiei 

 are well represented in the county by rare species. Opegrapha involuta, 

 not recorded for any other English county, occurs, as well as Graphis 

 Ruiziana and 0. lentiginosa, at Ivybridge, and at Lynton O. grumulosa and 

 Chiodectonsarniense are met with. Lithographa dendrographa has been found 

 in several localities, being commoner in the county than has been hitherto 

 supposed ; it is usually found on elm trees in the same situations where the 

 rare Lecidea carneo-lutea also occurs. Synalissa symphorea, which was first 

 recorded from St. Vincent's rocks in Gloucestershire, has not recently been 

 found there, and Torquay, and Portland in Dorset are now the only two 

 British localities known for it. The Collemei are well represented in 

 the limestone districts of Plymouth, Torquay, and Newton Abbot, but the 

 Caliciei and the genus Phlyctis, which are more abundant on trees in drier 

 counties, are of comparatively rare occurrence in Devon. On the other 

 hand the species of the genus Pertusaria are more frequently found in 

 fruit in the Dartmoor ravines than in any other county, including such 

 species as P. globulifera, P. ve/ata, P. dealbata, and P. amara, the fruit of 

 the last, which occurred abundantly one year at Lydford, not having been 

 detected elsewhere in Great Britain. The nomenclature followed in this 

 list is that of Crombie, British Lichens (1894) as far as Urceolaria, and 

 Leighton's Lichen Flora of Great Britain (1879) for the remainder of the 

 list. The rarer species are indicated by an asterisk. 



LICHENES 



EPHEBACEI 



Ephebe pubescens, Nyl. 4, 6, 8 

 •Gonionema velntinum, Nyl. 6 



COLLEMACEI 



•Collema auriculatum, HofFm. 

 subsp. granosum, Nyl. 



— cheileum, Ach. 4, 7 



f. nudum, Nyl. 6, 7 

 * — concinnum, Flot. 7 



— crispum, Ach. 



subsp. ceranoides, Nyl. 



— cristatum, HofFm. 6 



— flaccidum, Ach. 1-7 

 • — furvum, Ach. 7 



var. tunaeforme, Nyl. 



— glaucescens, Hofim. 6 



— granuliferum, Nyl. 6, 7 



— melaenum, Ach. 



f. marginale, Ach. 6 



— microphyllum, Nyl. 4 



— nigrescens, Ach. 5-7 



— plicatile, Nyl. 6, 7 



— pulposum, Ach. 6, 7 



f. compactum, Nyl. 6 



— tenax, Ach. 7 



var. coronatum, Koerb. 



6 [Chudleigh] 



1,4,6 



COLLEMACEI {continued) 



*ColIemodium fluviatile, Nyl. 1 



* — fragile, Nyl. 6 



•— Schraderi, Nyl. 6, 7 



— turgidum, Nyl. 7 

 Dendriscocanlon bolacinum, Nyl. 6, 8 



*Leptogium Burgessii, Mont. 7, 8 



— lacerum, Gray. 6, 7 



f. fimbriatum, Nyl. 6, 8 

 subsp. pulvinatum, Nyl. 4, 6, 7 



— muscicolum, Fr. 6 

 * — palmatum, Mont. 8 



* — tenuissimum, Koerb. 6 

 * — tremelloides. Grey. 1, 6 

 • — polyphyllum, Nyl. 6 

 Lichina confinis, C. Ag. 6, 7 



— pygmaea, C. Ag. 6, 7 

 •Synalissa symphorea, Nyl. 6 



LICHENACEI 



Caliciei 



*Calicium curtum, Turn, and Borr. 6 

 * — hyperellum, Ach. 2 

 * — quercinum, Pers. 6 



f. chlorodes, Nyl. 6 



f. lenticulare, Nyl. 6 

 Sphinctrina turbinata, Leight. 4 



II! 



