368 FLORA OF OXFORDSHIRE. 
In Topographical Botany, ed. i. vol. ii. pp. 665-710, is a comital census 
of British plants showing in a tabular form the comparative distribution 
of the British species. Adopting this as a standard we find that— 
Of the 239 species found in go to 110 counties and vice-counties of 
Britain, Oxford has 238, the missing species being Drosera, which has been 
extirpated during the present century. 
Of the 129 species found in 80 to 90 counties we have 126, Comarwm, 
Narthecium, and Scirpus cespitosus being absent. 
Of the 124 species found in 7o to 80 counties we have 117, the missing 
ones being Equisetum sylvaticum, Genista anglica, Eriophorum vaginatum, 
Osmunda, Plantago maritima. 
Of 113 species found in 60 to 70 counties we have 96, the inland species 
missing being Empetrum, Ranunculus Sardous, Carex curta, Dryopteris, 
Chrys. alternifolium. 
Of 107 species found in 50 to 60 counties we have 79, the inland 
desiderata being Vacc. Oxycoccus, V. Vitis Idea Orobanche major, Utric. 
minor, Viola lutea, Elodes, Thalic. minus, Trollius, Geran. sanguineum, 
Campan. latifolia, Potam. heteroph. Sagina subulata, Prunus Padus, 
Listera cordata, Pilularia, Rubus sawatilis, Myrioph. altern, Crepis palu- 
dosa, Lycopod. inundatum. 
Of the 104 species found in 40 to 50 counties we have 73, Mentha 
rotund., Dros. anglica, D. intermedia, Carex levig., Lycop. alp. Selaginella 
Dianthus deltoidea, Card. heterophyl., Carex distans, Allosurus, Hymenoph. 
Wilsoni, C. teretiuscula, Geran. sylvaticum, Wahlenbergia, Habenaria albida, 
Ran. Lenormandi, Sax. hypnoides, Thelypteris being absent. 
Of the 84 species found in 30 to 40 counties we have 43, the special 
absentees being Allium oleraceum, Potamogeton obtusifol, Equiset. hyemale, 
Diplotaxis tenuifol., Myosotis sylvatica, Calam. lanceolata, Carex stricta, 
Linum angustifolium, Hypocheris glabra, Pyrola media. 
Of the 109 species found in 20 to 30 counties we have 59, Gent. Pneu- 
nomanthe, Spargan. minimum, Impatiens Noli., Trigonella, Salix acuminat., 
Camp. patula, Lastrea emula, Scirpus uniglumis, Cardamine impatiens, Po- 
tam. plantag., Gastridium,Vicia Orobus, Arnoseris, being notable exceptions. 
Of the 11 plants recorded for 19 counties we have Fumaria Borei, 
Cineraria campestris, and Polypod. calcareum. 
Of the 10 plants recorded for 18 counties we have Polyg. vulgaris, 
Tilia parvifol., Orchis incarnata. 
Of the 16 plants found in 17 counties we have Fumaria confusa, Epilo- 
bium tetrag » Gal. erectum, G. elongatum. 
Of the 17 plants found in 16 counties we have Pulsatilla, Fumaria 
muralis, Cynoglos. sylvaticwm, Chen. ficifol. (2). 
Of the 10 species found in 15 counties we have Fumaria parviflora, 
Viola tricolor, Filago apiculata, F. spathulata. 
Of the 20 species found in 14 counties we have Orchis latifolia, Poly- 
gala ovyptera, Vicia gracilis, Polyg. maculatum, P. mite. 
