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 Pedinophyllum interruptum 
L. F. dilatata Jungermannia riparia 
L. Lejeunia calcarea J. turbinata 
L. L. serpyllifolia J. bantriensis 
L. L. Rosettiana Metzgeria pubescens 
L. Porella platyphylla M. furcata 
L. Scapania aequiloba Reboulia hemisphaerica 
S. aspera Riccia glauca 
Mosses. 
Ditrichum flexicaule Zygodon viridissimus 
“Swartzia montana ” Orthotrichum anomalum 
L. Selegeria Doniana O. cupulatum 
L. S. pusilla Funaria calcarea 
L. S. acutifolia F. hygrometrica 
L. “S. tristicha” Bartramia Oederi 
L. “8S. calcarea” Webera cruda 
Fissidens spp. Bryum spp. 
F. decipiens B. capillare 
F. adantioides Minum spp. 
Grimmia apocarpa M. stellare 
G. pulvinata Neckera crispa 
Rhacomitrium canescens Anomodon viticulosus 
R. lanuginosum Pleuropus sericeus 
Tortula muralis Campothecium lutescens 
T. subulata Eurynchium murale 
Barbula rubella E. tenellum 
B. tophacea E. Teesdalei 
L. Weissia calcarea E. pumilum 
W. rupestris E. Swartzii 
Trichostomum crispulum E. crassinervium 
L. T. mutabile Amblystegium spp. 
T. tortuosum 
Encalypta vulgaris 
E. streptocarpa 
A. confervoides 
Hypnum spp. 
H. molluscum 
