68 YORKSHIRE NATURALISTS UNION. 



Knaresborough, and Lecidea geographica was noticed in a rather 

 unusual habitat on gritstone at Markington. 



Fungi were represented by Agaricus uDibellifenis, Uredo 

 Potentillarum, Rhytisma acerhium and Stegia ilicis. 



Among the few Algse collected was Lemania fluviatilis. 



Many other things would no doubt have been seen at this 

 ramble but for the very backward season. 



YORK, FOR ASKHAM BOG, JUNE 2ND, 1 879. 



This meeting was characterised by all the workers investi- 

 gating one place only, and consequently the number of species 

 observed was hardly as great as if the wider area usually ex- 

 amined had been gone over. The greater part of Askham Bog 

 consists of a swamp, for the most part covered with small trees ; 

 it occupies the surface of a peat bed, resting on a depression of 

 clay. The number of vascular plants observed was 182, includ- 

 ing many very local species, but had the season been more 

 advanced the number observed would have been considerably 

 larger. The rarest plant of the bog was Carex paradoxa, which 

 occurred in great profusion ; and among other unusual plants were 

 Ranunculus Lingua, Stellaria giauca, Vicia lathyroides (near 

 Acomb), Hottonia palustris, Hydrocharis morsus-rancB, Serratuia 

 tinctoria, Utricularia neglecta, Cladium Mariscus, Cai'ex 

 sfricta, C. liparia, C. Fseudo-cypertis, Nephrodiutn Thelypteris and 

 Osmunda regalis. 



Forty-one species of mosses were observed, none of which were 

 very rare. Hypnum cordifoliwn was extremely plentiful, also Tetraphis 

 pellucida and Amblystegiuin serpens at the bases of the trunks of 

 the trees, also Amblystegium heterodadium, new to Britain. 

 Aiilacomnium androgynum with pseudopodia was growing on a 

 fallen trunk intermingled with Ceratodon purpureus in fruit, the 

 striated capsules of the latter making the finder almost certain 

 that he had got the extremely rare fruit of Aulacomnium 

 androgynum. Climacium dendroides was also plentiful in the 

 bog, along with fine fruiting Hypnum cuspidatum. 



Several common lichens were noticed, and among the 



Trans. Y.N.U., 1879. Series E 



