CH. V] 



ASSOCIATIONS OF ROCKS AND SCREES 



135 



occurring on the limestone cliffs of Derbyshire, the species 

 which do not occur on the sandstones or shales are preceded 

 by the letter " L." The list is by no means an exhaustive one, 

 as a full list would contain many of the plants of the ash 

 woods, related scrub, and calcareous pasture. However, certain 

 species are more partial to the cliffs than to any other kind of 

 habitat. The following are species of this character : 



Liverworts. 



Frullania Tamarisci 

 L. F. dilatata 

 L. Lejeunia calcarea 

 L. L. serpyllifolia 

 L. L. Rosettiana 

 L. Porella platyphylla 

 L. Scapania aequiloba 



S. aspera 



Pedinophyllum intermptum 



Jungermannia riparia 

 L. J. turbinata 



J. bantriensis 

 L. Metzgeria pubescens 



M. furcata 

 L. Reboulia hemisphaerica 



Riccia glauca 



Mosses. 



Ditrichum flexicaule 



"Swartzia montana" 

 L. Selegeria Doniana 

 L. S. pusilla L. 



L. S. acutifolia 



L. "S. tristicha" L. 



L. "S. calcarea" L. 



Fissidens spp. 



F. decipiens 



F. adantioides 

 Grimmia apocarpa 



G. pulvinata 

 Rhacomitrium canescens 

 R. lanuginosum 

 Tortula muralis 



T. subulata 



Barbula rubella 



B. tophacea L. 



L. Weissia calcarea 



W. rupestris 



Trichostomum crispulum 

 L. T. mutabile 



T. tortuosum L. 



Encalypta vulgaris 



E. streptocarpa 



Zygodon viridissimus 

 Orthotrichum anomalum 

 0. cupulatum 

 Funaria calcarea 

 F. hygrometrica 

 Bartramia Oederi 

 Webera cruda 

 Bryum spp. 

 B. capillare 

 Minum spp. 

 M. stellare 

 Neckera crispa 

 Anomodon viticulosus 

 Pleuropus sericeua 

 Campothecium lutescens 

 Eurynchium murale 

 E. tenellum 

 E. Teesdalei 

 E. pumilum 

 E. Swartzii 

 E. crassinervium 

 Amblystegium spp. 

 A. confervoides 

 Hypnum spp. 

 H. molluscum 



