120 THE JOURNAL OF BOTANY 



Mr. Upton, of the Bedford Office, tells me that when this area 

 was levelled many horses with tumbrils were seen standing upon 

 this site for comparatively long periods waiting for their loads, 

 and were observed scattering much rough forage about them. 

 This rough forage is frequently obtained by mowing rough river- 

 side and waste place herbage. When at the Norfolk Broads, Mr. 

 Upton saw men mowing rough herbage bordering upon the Broads, 

 and he observed Epilobium angustifolium amongst this herbage. 

 The plants found upon our building-sites, which I have included 

 in this group, mainly consist of such species as one would expect 

 to find amongst waste-place and waterside herbage, and it would 

 appear to be quite likely that these plants have originated from 

 such coarse forage. It would probably be mown before the grass- 

 seed ripens, hence the absence of grasses from most of the sites 

 visited, other than those one might expect to meet in London ; 

 Agrostis alba being the only meadow-grass which appears in most 

 of these lists. The presence of oats, wheat, and barley, and such 

 corn plants as Lychnis alba, would probably be due to the addi- 

 tion of tail corn, or the corn left after dressing operations, and 

 chaff to the forage. The list of plants found upon this site, 

 however, includes a mixture of meadow-grasses, but with the 

 above exception these do not appear in other lists, and this 

 would suggest the addition of meadow hay to the forage used 

 upon this site. Some of the seeds may of course have passed 

 through the digestive organs of the horses uninjured; further 

 reference to these plants will be made in the concluding remarks. 

 It will be noticed that, with the exception of the meadow-grasses 

 above alluded to, the constituents of all the lists of forage plants 

 suggest a similar origin. It appears likely that the nose-bags of 

 the horses used upon this site may have contained a mixture of 

 forage from different localities. 



Sisymbrium officinalis Scopoli. 



Polygonum Persicaria L. 1, 



Thlasjn arvense L. 



4. 



Silene latifolia comb. nov. 1. 



P. Convolvulus L. 1, 4, 5. 



Lychnis alba Miller. 



Phleum pratense L. 



Melilotus officinalis Lamarck. 



Agrostis alba L. 3, 4, 5. 



1. 



Avena sativa L. (cultivated 



M. alba Desrousseaux. 



form). 1, 3, 5. 



Trifoliimi repens L. 1, 5. 



Poa an7iua L. 1, 4, 5. 



Pastinaca sativa L. 



P. pratensis L. 



Matricaria inodora L. 1. 



Dactylis glomerata L. 



Plantago lanceolata L. 



Serrafalcus arvensis Godron. 



P. major L. 1, 3, 4, 5. 



Triticum vulgareYiW. (cultivated 



Chenopodium album L. 



form). 



Atriplex patula L. 1, 5. 



Lolium perenne L. 



Bumex obtusifoUus L. 4. 





Garden 



Escapes. 



The garden escapes upon the Bloomsbury site proved very 

 interesting. In addition to such plants as Ampelopsis quinque- 



