YORKSHIRE NATURALISTS' UNION. 



Papaver Argemone. 

 Corydalis claviculata. 

 Teesdalia nudicaulis. 

 Spergula arvensis. 

 Spergularia rubra. 

 Scleranthus annuus. 

 Radiola Millegrana. 

 Sarothamnus scoparius. 

 Trifolium arvense. 

 Ornithopus perpusillus. 

 Peplis Portula. 

 Montia fontana. 

 Chccrophyllum Anthriscus. 

 Centaurea Cyanus. 

 Chrysanthemum segetum. 

 Hieracium boreale. 

 Jasione montana. 

 Erica cinerea. 

 Digitalis purpurea. 



Galeopsis versicolor. 



Teucrium Scorodonia. 



Anagallis tenella. 



Plantago Coronopus. 



Rumex Acetosella. 



Salix repens. 



Juncus bufonius & squarrosus. 



Carex arenaria. 



Aira flexuosa and preecox. 



Holcus mollis. 



Weissia viridula. 



Dicranella heteroraalla. 



Polytrichum juniperinum. 



P. piliferum. 



Pogonatura aloides & nanum. 



Bartramia pomiformis. 



Brachythecium albicans. 



Squamaria saxicola. 



Ulva crispa. 



The larger Fungi abound especially on sandy soil. 



Some of the above which love moist situations are common 

 to sand and peat. 



4. Argillaceous. — Clayey soils are cold, wet and back- 

 ward; the flora is meagre as regards number of species as compared 

 with that of either limestone or sand, and is marked less by the 

 presence of particular plants than by the absence of those charac- 

 teristic respectively of limestone and sand. 



The following plants, though by no means confined to, are 

 nevertheless frequently found on a clay soil: — 



Ononis arvensis, 

 Trifolium medium. 

 Silaus pratensis. 

 Scabiosa succisa. 

 Achillea ptarmica. 



Tussilago Farfara. 

 Picris hieracioides. 

 Helminthia echioides. 

 Sonchus arvensis. 

 Lysimachia nummularia. 



Trans. Y.N.U., 1878. SeriesE 



