268 



Yorkshire Naturalists at Pockliiigton. 



The distribution of most of those met with is pretty g-eneral ; 

 two — Puccinia calthce and Triphragmiiim ulmarice — are less 

 common ; the latter was found in quantity on Meadow-sweet in 

 one of the surface drains on Allerthorpe Common. The leaves 

 of a wild Rose bush by the wayside between Pocklington and 

 Millington were covered with the pustules of Phragmidium siih- 

 corticatiim. In a Pine-Poplar wood near the same place white 

 moulds appeared to be prevalent on several plants. 



An Oat field near Barmby-on-the-Moor was in a sorry plight. 

 The oat plants were thinl}^ strewn and short in the straw. In 

 some parts of the field the ' crop ' consisted almost solely of 

 badly-diseased Knot-grass. This is a very troublesome weed, 

 bad enough when healthy, much worse when diseased ; it was 

 almost white wHth the parasitic mould Erysiphe commiuiis, in 

 addition to being attacked with Uromyces polygoni. The few^ 

 oats there were appeared to be healthy in the grain, though the 

 surroundings were frightful for a grain-growing field. Whether 

 these conditions were owing to sheer neglect, miserably poor 

 farming, or natural poverty of the land — a loose sandy soil — 

 I am not prepared to say. 



The full list of species found is given below, the only value 

 of which is to help in working out a more complete distribution. 



P. = Pocklington ; A.C. = Allerthorpe Common ; M. = Mill- 

 ington ; B. = Barmby-on-the-Moor. 



Amanita riihesceiis. A.C. 



Collyhia dryophiliis. A.C. 



Mycena piillata. A.C. 



Entoloma juhatiLDi. A.C. 



I^iocyhe rimosa. M. 

 Hehelovia suhsaponaceiivi. 



HVMENOM YCETES, 



P. 



POLYPORACEJB. 



Boletus JlavTcs. 

 Polyporiis squamostis. 

 Polyporiis elegans. 

 Polystictiis versicolor. 



A.C. 

 P. 

 M. 

 P. 



HYDNACE/E, 



Hyd)i2ini Stevensoiii. ]M. 



UREDINACEjE. 



In Beech plantation. A.C. 

 Galera tenera. A.C. 

 Galera hypnoruvi. A.C. 

 Agaricus campestris. P., B., M. 

 Stropharia slercora rca. 



Melainpsora pinitorqiia Rostrup 



On Populiis tremida. A.C. 

 M el a mpso ra ep itea . 



On Sati.v z'i/ui/inlis. A.C. 



ColcosporiuDi seiiecioii is. 



= J/. frcDmlce. 



= stercoraria. P. 



Panceoliis rctiriigis. A.C. 



Copriiiiis niveus. A.C. 



Copri)ius piicatilis. P., A.C. 



Copiiiiiis 1)1 icdccoits. A.C. 



Paxil' lis i nvol iitits. A.C. 



Afarasii/iiis arcades. P., B., A.C. 



M a rasiii iiis peron at us. A. C . 



On Gera)iiui>> pratcnsc. P. 

 Puccinia calthce. 



On Polygoiiuui avicularc. B. 

 f ^roniyccs gcra u ii. 



On Soiecio Jacobcea. A.C. 



Uroiuyccs polygon i. 



0\\ Calfha palustris. M. 



Naturalist, 



