THE FLORA OF WARWICKSHIRE. 
261 
great reservoir then covered but a very small area, so that large 
portions of its bed were dry and hard, and covered with a rich 
vegetation, quite unusual to such a habitat. The more prevailing 
plants were Chenopodium rubrum, not before recorded from the 
Tame basin, assuming here every stage of growth, from the large 
bush-like erect typical form to the small prostrate form often 
mistaken for the variety pseudo-botryoides. Growing with this, and 
quite rivalling it in abundance and robustness, were Nasturtium 
palustre, extensive tufts of Gnaphalium uliginosum , Polygonum lapa- 
thifolium , Polygonum Persicaria var. elatum, and the more rare 
Polygonum macula turn. Then, but more rarely, we saw patches of 
the more minute Limosella aquatica , new to the Tame basin ; and 
Littorella lacustris, not recorded from this locality before. On the 
more recently exposed portions of the bed of the reservoir, our 
attention was attracted by large patches of vivid green, often 
several yards in circumference, which were found to be composed 
of vast colonies of the rare little earth moss, Physcomitrella patens , 
which usually makes its home on the dried sediment of pools or 
sides of drains. Intermixed with this were little round patches of 
what at first appeared to be Riccia glauca, but more careful examina¬ 
tion at home proved it to be the very much more rare Riccia 
crystallina, which is new to the Midlands and very rare elsewhere 
in Britain. This differs from R. glauca in its yellowish-green 
colour, its spongy, cavernous fronds, and its bright, pellucid, 
transparent upper surface, which, when fresh, has the peculiar 
appearance of the upper surface of the leaves of some of the 
Mesembryantliemums. 
I may here also mention another interesting find from a locality 
remote from this reservoir, Wolford Wood, where I found that very 
rare hepatic, Cephalozia Turned , originally found in the early part 
of this century on the shaded bank of a river near Ban try, Ireland, 
by Miss Hutchins ; more recently found by our great authority on 
the liepatics, Mr. Pearson, in Wales, and recorded doubtfully from 
England in the London Catalogue of British Mosses. This is a 
very minute plant, and at Wolford Wood it occurs on marly, damp 
banks, intermixed with other species of this tribe of plants. I 
November, 1893. 
