INTRODUCTION, xl 
the journey only to see those hedgerows, the liberal homes of 
unmarketable beauty,” covered as they are with tangled masses 
of Traveller’s joy, and formed of white beam which a puff of 
wind whitens as you look, intermingled with the dark foliage of 
the true cherry, the glossy spinous-leaved holly, and “starred 
with pale pink dog-roses.” The Tertiary-covered commons are 
rich with a profusion of Blackberries in almost endless variety, 
over which hover such multitudes of Scarlet Admirals and 
Painted Ladies that the place seems full of sentient life. In 
other places these commons are covered with sweet short turf of 
brightest green in which hide the aromatic Chamomile, the 
smallest trefoil, and heath galium, or again glow as the 
golden furze takes possession and forms a prickly mass whose 
continuity is here and there broken by some small pond with 
its surface covered with the large white flowers of the water 
buttercup. In addition to the charm exerted by the great 
variety of flowers is the pleasure of seeing the scattered cottages 
with their kind and pleasant inhabitants, free from the squalor 
of too many of our villages, and enjoying rude health in this 
purest air. 
Plants occurring on the Lower Chalk from Mongewell to 
Princes Risboro, including the north side of the Chalk escarp- 
ment. 
Papaver hybridum, Fumaria densiflora, parviflora, § Vaillanti, 
Arabis hirsuta, Alyssum calycinum, Thlaspi arvense, Iberis 
amara, Riseda lutea, Helianthemum vulgare, Viola mentita, Poly- 
gala vulgaris, P. calcarea, P. oxyptera, Cerastium arvense, A lsine 
tenuifolia, Hypericum angustifolium, H. montanum, Genista 
tinctoria, Anthyllis, Hippocrepis, Onobrychis, Prunus Cerasus, 
Poterium muricatum, Spirea Filipendula, Rosa micrantha, asper- 
nata, foetida, subglobosa, mollissima, Sorbus Aria, S. Aucuparia, 
Pyrus communis, Sedum Telephium, Saxifraga granulata, Sam- 
bucus Ebulus, Galium Cruciata, G. erectum, Asperula cynanchica, 
Valerianella dentata, Centaurea decipiens, Anthemis arvensis, 
Filago spathulata, Cineraria campestris, Inula Conyza, Erigeron 
acre, Picris, Campanula glomerata, Specularia, Monotropa hypo- 
pithys, M. hirsuta, Gentiana germanica, G. Amarella, Atropa. 
Verbascum nigrum, Linaria repens, Veronica montana, Chlera 
perfoliata, Linaria vulgari-striata, Orobanche elatior, O. minor, 
