_Leersia oryzoides_ (ditches of Hants., Sussex and Surrey). _Panicum sanguinale_ (S. England). _P. verticillatum_ (fields in S. and E.). _P. glaucum_ (rarely introduced). _Hierochloe borealis_ (Thurso only). _Phleum alpinum_ (Highlands only). _P. Bœhmeri_ (Eastern counties, rare). _P. asperum_ ” ” ” _Phalaris canariensis_ (rare weed). _Alopecurus alpinus_ (Highlands). _Mibora verna_ (Anglesea and Channel Islands). _Lagurus ovatus_ (Suffolk coasts). _Polypogon monspeliensis_ (rare, in S. England near sea). _P. littoralis_ (salt marshes S. England). _Agrostis setacea_ (dry heaths of S. Wales). _A. Spica-venti_ (sandy fields of E. counties). _Gastridium lendigerum_ (fields and waste places in S. Wales and Norfolk). _Calamagrostis Epigeios_ (moist glades &c. in Scotland). _C. lanceolata_ (moist shades, scattered in England). _C. stricta_ (bogs, &c., very rare). _Cynodon Dactylon_ (waste and cultivated lands near sea in Scotland). _Spartina stricta_ (salt marshes S. and E. coast). _Lepturus incurvatus_ (scattered on shores). _Bromus maximus_ (Jersey). _B. madritensis_ (roads and waste, Scotland and Tipperary). _B. inermis_ (introduced from Hungary). _Lolium italicum_ (introduced from Lombardy). _Festuca uniglumis_ (Irish and S.E. coast). _Poa procumbens_ (waste ground near sea). _P. loliacea_ (sandy sea-shores). _P. laxa_ (Ben Nevis, &c.). _P. alpina_ (Highlands and N.). _Catabrosa aquatica_ (shallow pools and ditches, scattered). Finally, a few words may be said on a subject still in its infancy--that of Indicator-plants. In many cases certain plants are found so confined to certain classes of soil, that foresters and agriculturists have claimed to be able to infer from their presence the presence or absence of certain chemical or other constituents of soils: on the contrary we find other plants so universally distributed without reference to the quality of the soil, that they are not indicative. The latter are often termed _ruderal_ or _vagabonds_ (see p. 29). Without attempting too rigid a classification of Grasses in this connection--which would be premature in this early state of our knowledge--the following remarks are at least generally true. A few grasses are Indicators of chalk and limestone--e.g. _Briza media_, _Kœleria cristata_, and the exotic species _Stipa pennata_ and _Melica ciliata_. The following are said to indicate a sufficiency of potassium salts, In moister soils. _Digraphis arundinacea._ _Phleum pratense._ _Avena pubescens._ _Arundo Phragmites._ _Molinia cærulea._ _Glyceria fluitans._ In drier soils. _Anthoxanthum odoratum._ _Alopecurus pratensis._ _Agrostis alba._ __Holcus lanatus.__ _Arrhenatherum._ _Kœleria cristata._ _Briza media._ _Dactylis glomerata._ _Cynosurus cristatus._ _Poa pratensis._ _P. trivialis._ _P. compressa._ _Festuca elatior._ _Lolium perenne._