In presenting an account of the rarer plants as full a list from each sub-district (as space permits) will be given, but many of the plants cited for one or other sub-district may also be found in one or more of the others.
The plants marked by an asterisk* before the name are probably extinct.
I. Tame.—This sub-district embraces all those portions of the Tame valley not drained by the Blythe or Anker, and includes Sutton, Middleton, Water Orton, Kingsbury, Shustoke, and Arley. The country is generally flat, but is slightly elevated on both right and left banks, near Arley, Middleton, Dosthill, and Shustoke. In this district about 750 flowering plants and ferns are recorded; among the more rare are—
Ranunculus fluitans, R. Lenormandi, R. Lingua; Nymphæa alba; Viola palustris; Moenchia erecta; Ornithopus perpusillus; Comarum palustre; Rubus Schlechtendalii, R. rosaceus; Rosa sphærica; Callitriche obtusangula; Parnassia palustris; Galium uliginosum; Valeriana dioica; Chrysosplenium alternifolium; Dipsacus pilosus; Carlina vulgaris; Carduus nutans; Leontodon hirtus; Jasione montana; Vaccinium Vitis-Idæa, V. Oxycoccos; Menyanthes trifoliata; Mentha rotundifolia; Calamintha Acinos; Scutellaria minor; Pinguicula vulgaris; Polygonum maculatum; Empetrum nigrum; Salix fusca; Juncus diffusus; Scirpus pauciflorus; Eriophorum vaginatum; Carex dioica, C. curta, C. Ehrhartiana, C. lævigata, C. fulva; Agrostis nigra; Botrychium Lunaria; Nephrodium Thelypteris; Chara opaca.
II. Blythe.—The Blythe, which rises on the borders of East Worcestershire near Earlswood, takes its course through Solihull, Knowle, Hampton-in-Arden, Packington, and Coleshill, to its confluence with the Tame, near Whitacre; with this is included the Cole, running through Marston Green and Coleshill. This sub-district is mostly flat, the soils are usually sand, marl, and clay. Heath lands occur near Earlswood and Coleshill; bogs and marshes near Coleshill and Barston. The recorded flora is about 820 flowering plants and ferns, the following being the more noteworthy:—
Thalictrum flavum; Aquilegia vulgaris; Drosera rotundifolia; Cerastium arvense; Sagina ciliata; *Elatine hexandra; Hypericum elodes; Geranium pyrenaicum; Genista tinctoria; Vicia tetrasperma; Rubus suberectus, R. adornatus; Rosa micrantha, R. surculosa, R. obtusifolia, R. Reuteri; Pyrus torminalis; Cotyledon Umbilicus; Œnanthe crocata; Chærophyllum Anthriscus; Sambucus Ebulus; Carduus pratensis; Anthemis arvensis; Bidens cernua, B. tripartita; Solidago virga-aurea; Lactuca muralis; Hieracium umbellatum; *Pyrola media; Linaria minor; Limosella aquatica; Veronica Buxbaumii; *Orobanche major; Mentha piperita; Stachys ambigua; Myosotis repens, M. sylvatica, M. collina, M. versicolor; Lysimachia vulgaris; Littorella lacustris; Populus canescens; Lemna gibba; Potomogeton rufescens; Orchis Morio; *Gymnadenia conopsea; Narthecium ossifragum; Rhynchospora alba; Scirpus multicaulis, S. cæspitosus; Carex elongata; Agrostis canina; Calamagrostis lanceolata.
III. Anker.—The Anker rises about 3 miles S.E. of Bedworth, drains the country about Bedworth, Nuneaton, Atherstone, Polesworth and Tamworth, and enters the Tame at Tamworth. The country it waters is usually flat, but on its left bank at Hartshill and Polesworth there is rising ground about 500 feet above sea level. In this sub-district the Warwickshire coalfields occur, and it is possibly due to the great prevalence of smoke that its flora is meagre and the plants often depauperated. The recorded flora is about 680 flowering plants and ferns, and among the more rare are:
*Myosurus minimus; Cardamine amara, C. impatiens; Viola Reichenbachiana; Stellaria aquatica; Tilia parvifolia; Rhamnus catharticus; Genista tinctoria; *Vicia sylvatica; Prunus insititia; Potentilla procumbens; Rubus calvatus, R. mucronulatus, R. Bloxamii, R. foliosus, R. Bellardi; Rosa andegavensis, R. bibracteata; Epilobium roseum; Œnanthe fluviatilis; Cornus sanguinea; Matricara Chamomilla; Wahlenbergia hederacea; Atropa Belladonna; Veronica polita; *Orobanche elatior; Rumex pratensis; Salix pentandra, S. rubra; Sparganium neglectum; Sagittaria sagittifolia; Butomus umbellatus; Potamogeton pusillus; Epipactis latifolia; Fritillaria Meleagris; Scirpus acicularis; Nardus stricta; Ceterach officinarum; Equisetum maximum; Chara Hedwigii.
IV. Avon.—This sub-district includes that portion of South Warwick within the area not drained by the Leam, Sow, Alne, and Arrow, including Milverton, Stoneleigh, Warwick, Stratford-on-Avon, Bidford and Salford Priors. This valley is beautifully undulating and well-wooded, watered by many minor streams, with very varied soils and usually highly cultivated. Its flora is peculiar from the absence of bog and heath plants, the records comprising about 970 flowering plants and ferns, of which the following are the rarer:—