44 tHE CRYPTOGAMIC FLORA OF KENT?. 



Jenner's 'Flora of Tunbriclge Wells,' such as Cephalozla connivens, 

 J.hyalina, J. harhata, Blepharozia ciliaris, and Odontoschisma Sphagni, 

 may yet be added to the list by those who have the opi)ortunity of 

 explomig the south-western and western portions of the county. 

 The marshes l)etween Deal and Sandwich and the neighbourhood of 

 Komney Marsh may possibly yield some of the rarer frondose species, 

 such as PaUavicinia hibeniica and Petaluphylhun Ralfsii, while the 

 damp woods in the neighbourhood of Canterbury should furnish 

 more than one 8j)ecies of Cephalozia and Lejeunia if carefully 

 searched. The amount of success with v/liich occasional visits to 

 Kentish woods have been rewarded, convmce me that they are far 

 richer in cryptogamic plants than the dry natm'e of the soil would 

 lead one to expect. 



In the present paper only two works beside the local floras 

 already mentioned "^ have been quoted, viz. : — 



W. J. Hooker, ' British Jungermanniae,' 1816. 



M. C. Cooke, ' British Hepaticje,' 1866. 



Dr. Carrington's new work not being at i^resent completed, it 

 seemed advisable not to quote from it ; names adopted in this 

 paper are, however, identical with those used up to the present 

 time by that author. The arrangement followed has been that of 

 Dumortier in his ' Hepaticse Europsese.' 



It may be here mentioned that the following method of 

 examining the leaf-structm-e will be found useful in determining 

 nearly allied species having leaves somewhat similar in outline, 

 when found only in the barren state : — Take a leaf (if from a dried 

 specimen it should previously be steeped m water), place it 

 between two slips of glass, with a few drops of a mixture of equal 

 parts of liquor x^otassae and water, warm over a spirit lamp until 

 ebullition takes place ; then wash the leaf in water, place it on a 

 fresh slip and add a drop of iodide of zinc solution and put on the 

 cover. Under the action of the liquor potass^ the inner wall con- 

 tracts u^Don its contents, and the whole structure is rendered more 

 transparent ; the epidermal layer of the leaf is dissolved as well as 

 the connecting tissue binding the cells together ; the outer wall of 

 the cells appears as a white luie separating them, thickened at the 

 angles by a hyaline deposit (the trigonum instertiale of authors), 

 which is uncolom-ed by the iodide of zinc. 



Marchantiace^ . 



Marchantia polymorpha, L. 



On damp banks in sandy places ; frequent in flower-pots 

 m greenhouses. July. E. B. t. 100 ; Cooke Brit. Hei^at. 

 f. 186, 187. 

 Blackheath ; Fl. Metr. Quarry near Penshurst Station, with 



both male and female fructification ; George ! 

 Easily distinguished when in the barren state from Lnmdaria 

 by its circular cups containmg gemmae. 



Journ. Bot., 1877, p. 12. 



