A HISTORY OF CUMBERLAND 
Additional plants gathered at Silloth by the late John Leitch, Esq., M.D., of that town, 
copied from the doctor’s MS. 
Natives of Britain, or mentioned in Babington’s Manual. 
Alyssum calycinum, L. Autens 
Erysimum cheiranthoides, L. 
Diplotaxis muralis, DC. Malcomia crenulata, Boiss 
Coronopus didymus, Sm. Lepidium perfoliatum, L. 
Silene noctiflora, L. — virginicum, L. 
Ornithopus perpusillus, L., introduced on Silloth Eruca vesicaria, Cav. 
Green, where it is extremely plentiful in the Brassica juncea, L. 
short turf Moricandia arvensis, DC. 
Viola Curtisii (Forster) now also abundant Chorispora syriaca, Boiss 
Carum Carui, L. Silene dichotoma, Ehrh. 
Anthemis tinctoria, L. Trigonella Fenum-grecum, L. 
Achillea tomentosa, L. — monspeliaca, L. 
Carduus crispus, L., v. polyanthemos (Koch) Medicago Soleriolii, Duby. 
— pycnocephalus, L. Trifolium parviflorum, Ehrh. 
Cnicus arvensis, L., v. setosus (Bess.) Potentilla collina, Wibel 
Crepis setosa, Hall. fil. CEnothera tenella, Cav. 
Solanum nigrum, L. Hypecoum grandiflorum, Benth. 
Calamintha arvensis, Lam. Hemizonia pungens, Torr €% Gray 
Lamium purpureum, L., v. decipiens (Sonder) — Kelloggii, Greene 
Dipsacus sylvestris, Huds. Phacelia ciliata, Benth. 
Chenopodium polyspermum, L. Gilia achilleefolia, Benth. 
Lolium temulentum, L. — intertexta, Steud. 
Avena strigosa, Schreb. Carthamus lanatus, L. 
Polypogon monspeliensis, Desf. Neslia paniculata, Desv. 
Setaria viridis, Beauv. Valerianella coronata, DC. 
Bromus squarrosus, L. Ambrosia artemisiifolia, L. 
— patulus, Reich. Madia racemosa, Torr €% Gray 
— arvensis, L. Sideritis montana, L. 
— commutatus, Schrad. Mentzelia albicaulis, Doug]. 
— diandrus, Curt. Grindelia (?) 
Caucalis nodosa, Scop. Lathyrus sphzricus, Retz. 
Mariana lactea, Hill | wan, 1900 Herniaria hirsuta, L. Miss E. J. Glaister, 
Nasturtium terrestre, R.Br. 1900 
COUNTY AREAS 
It is customary to distinguish the several areas into which the surface of a county may 
be mapped out for the purposes of a flora, by prefixing to each division the initial letter of 
some river of importance as representing a river basin or system. I found, in compiling my 
recently published Flora of the County of Cumberland, that this plan, which has many advan- 
tages to recommend it, would be impracticable here where we have so many leading streams 
with the same initial letter; e.g. Eden, Ellen, Esk (two), Eamont, Ehen; similarly Caldew, 
Calder, Cocker; Wampool, Waver, Wiza; Glenderamakin, Glenderaterra, Greta; and so 
on. ‘To prevent confusion in this way I mapped out the areas as follows :— 
District I 
This area includes the southern portion of the county, is triangular in outline, and has 
on the east the river Duddon and the main watershed of the Cumbrian group of mountains. 
The river Derwent constitutes the northern boundary for the greater part of its course, the 
exception being at the north-eastern corner of the triangle, where the Skiddaw and Helvellyn 
fells are included, though situated some miles to the northward of the sources of that river. 
This arrangement provides for the inclusion of Lake Ullswater, which would otherwise be 
segregated from the remainder of the lakes, which all lie within the limits prescribed. The 
western side of the triangle is bounded by the Irish Sea and the Solway Firth throughout its 
entire length. It will be noticed that this area is to a large extent covered by rugged and 
lofty hills, which consist principally of rocks of volcanic origin, mixed in places with masses 
of granitic or granitoid cliffs and scattered boulders. In some places, as at Honister Crag in 
Buttermere, the Skiddaw slate is quarried and dressed for roofing purposes; and near the 
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