Botany 209 



HYLOCOMIUM squarrosum, B. and S. (HYPNUM). Damp grassy 

 places ; common ; 11. 



1. Chislehurst, Greenhithe, Abbey Wood, etc., '77. H 



H. triquetrum, B. and S. (HYPNUM). Shady woods, thickets and 

 hedges ; common ; 12. 



1. Greenhithe, etc., '77. H. 



Section II. HEPATIC/E (Liverworts). 



The present list of Liverworts is based on a paper of 

 E. M. Holmes, F.L.S., published in the Journal of Botany, 1878. 

 A considerable number of sp. are cultivated at the Winter Gardens 

 at Avery Hill (L.C.C.), and several common British forms have 

 been introduced by the L.C.C. into the ponds and ditches about 

 Eltliam. The Jungermanniales are not here divided into families, 

 because of the numerous cross-connections between the groups, 

 and the consequently unsatisfactory state at present of the- 

 classification. 



Class I. MARCHANTIALES. 



N.O. 1. RICCIACE& 



RICCIA glauca, L. In clover fields and on damp fallow ground ; 12. 

 1. Ide Hill, '78. H. 



R. crystallina, L. Very rare. 



a. In a ditch near Deptford Lock, 1724. 



R, fluitans, L. Aquatic. 



1. In little pond in wood near Well Hall, '07. A. 



Tynemouth. 



2. Pond, back of Pippin Hall Farm, Eltham (introduced),. 



'07. L.C.C. 



N.O. 2. MARCHANTIACEM. 



MARCHANTIA polymorpha, L. Damp shady banks ; frequent, 

 especially on flower-pots in greenhouses ; circular gemmae- 

 cups ; 7. 



1. Hirst Woods, Bexley, on banks of stream, '07. J.F.B. 



2. Flower pots, Aver/ Hill, abundant, '07. L.C.C. 

 a. Blackheath, 1836.' 



