THE CKYPTOGAMIC FLORA OF KENT. 45 



AsTERELLA HEMisPH^EiCA, Beciuc. Mcirchcmtia heviispharica, L. 

 (E. B., Bot. Guide) ; Reboulia hemisphcerica, Eaddi ; Fagatella 

 hemisphcBvica, Mack. (Jeuuer, Fl. Tuiibr.) 

 Damp rocky places and moist saudy hedgebanks in hilly 

 districts. Not common, April to June. E. B. t. 503. Cooke 

 Brit. Hepat. f. 191. 

 In a small watercourse near the Wells at Sydenham, towards 

 Norwood, Martyn ; Bot. Guide. On the bank in the lane 

 leadhig from Kusthall Common to the High Eocks ; Lam- 

 berhurst Quarter, &c., not common; Jenner Fl. Tiinbr. 

 Boro' Green ; Ightham ; Halstead. 

 In the barren state may be known from Lunularia by the 

 purplish under surface of the frond and the absence of cups of 

 gemmae. 



CoNOCEPHALUs coNicus, Dumoi't. Marchantia conica (Forster Fl. T. ; 

 Jenner Fl. T.) Fegatella conica, Corda. 

 On damp sides of rivulets and on di'ipping places ; common. 



March, AprH. E. B. t. 504. Cooke Br. Hepat. fig. 190. 

 In the httle lane from Kusthall Common to the High Eocks, 

 on the right-hand side near the gate and elsewhere ; 

 Forster Fl. Tunhr. Southborough ; Fawcett. Maidstone ; 

 BigberryWood, near Canterbury ; Goudhurst ; Beech 

 borough ; Speldliurst. 

 Known in the barren state by the absence of cups containing 

 gemmsB, by its reticulated surface and aromatic odom\ 



Preissia commutata, Nees. Lichen pileatus parvus foliis crenatis, 



Bay Syn. 



Fissures of damp rocks, especially of limestone ; sometimes on 



sandy ground near the sea ; very rare. April, May. Cooke 



Brit. Hepat. fig. 188. 



" Mr. Dandridge observed it in a small watercourse near 



Dulwich Wells, towards Northwood;" Ray Syn. iii. p. 114. 



(In Forster Fl. Tunbr. Marchantia androgyna, E. B. t. 2545, 

 is said to occur on wet rocks in the little lane from Eusthall 

 Common to the High Eocks. The upper figures in this plate are 

 usually referred to Preissia commutator, Nees, a species which I 

 have not been able to find in the locality stated. In the lane 

 mentioned, both Asterella hemisp)h(Erica and Lunularia cruciata occur; 

 and the former is given in Jenner Fl. Tunb. as occurring there, 

 so that it is possible that Forster's plant is referable to Asterella 

 hemisjjharica.) 



[Dumortiera irrigua, Nees, should be looked for by the side of 

 streams in the Kentish Weald and in greensand districts. It has 

 the habit of Pellia epiphglla, but is of a dark green colour. It 

 has recently been found at Hastings, in Sussex, by Mr. E. George, 

 and may therefore occur in the south of Kent.] 



LuNULAEiA cruciata, DuMort. Lunularia vulgaris, Mich. (Jenner 

 Fl. Tunbr.) 

 On moist limestone walls and damp hedgebanks ; frequent 



