310 Mr. W. Mitten on the Mosses and Hepatica of Sussex. 



This pretty moss forms small dense tufts in cracks in the sand 

 rocks. The upper parts are of a fresh or yellowish green colour, the 

 lower pale brown ; the leaves are all erecto-patent and subulate from 

 a more elliptic pale base than in D.flexuosum ; the large cells found 

 at the base of the leaves of all Dicrana are scarcely visible in this 

 species, being reduced to a single row of cells. In D.flexuosum this 

 part is more developed and coloured of a deep red-brown, and the 

 areolation of the leaves is closer and more dense, and the leaves are 

 all much longer and often falcate. The capsules resemble those of 

 D. turfaceum. 



In the male plant the flowers are collected into capituli of four or 

 five flowers each, at the summit of every innovation. 



D. densum, Schleich., differs from the present species principally 

 in its straighter and more appressed leaves ; but whether it is not a 

 form produced by growing " ad margines fossarum in paludosis prope 

 Roche," as stated on the label of Mr. Borrer's authentic specimen, 

 is questionable. 



D. Funkii never grows on the ground in Sussex. 



26. D. turfaceum, C. Miiller; " dense csespitosum humile in- 

 ferne interdum divisum erectum haud tomentosum viride sub- 

 strictum, inferne nudiusculum, superne longe comosum, haud 

 falcatum ; folia caulina erecto-patentia apice paulisper falcata, 

 lanceolato-subulata longius capillacea canaliculata latinervia, 

 dorso scabra, summo apice denticulata, cellulis alaribus minus 

 conspicuis parvis laxis tenerrimis paucis plains prsedita, e cellulis 

 inferne quadratis pellucidis parvis superne minutissimis areolata ; 

 perichaetialia intima cylindraceo-convoluta, e basi longe vagi- 

 nante magis sensim subulata, inferne laxe pellucide superne mi- 

 nute areolata, longiora, apice denticulata ; theca plemmque soli- 

 taria in pedunculo valde arcuato ovalis basi vix apophysata glabra 

 sulcata pallida, operculo conico subulato obliquo longiori rubente \ 

 perist. dentes ad medium fissi, cruribus tenuissimis hyalinis ru- 

 gulosis haud nodosis ; calyptra ciliis albis insequalibus flaccidis 

 fimbriata." — C. Miiller, Synops. p. 399. 



Campylopus turfaceus, Bryol. Europ. Campylopus, p. 4. t. 3. 

 Dicranum flexuosum, Eng. Fl. in part. 



Not rare in moist sandy places. 



The most slender of all the British species, with longer and more 

 subulate capillary leaves, which are often broken and strewed in 

 abundance over the patches of the plant. As in D. Funkii, the en- 

 larged cells at the base of the leaf are reduced to three or four in 

 number, and not perceptible unless expressly looked for ; but it ap- 

 pears distinct from that moss in its longer, more flexuose and loosely 

 placed leaves. 



27. D. flexuosum, Hedw. 



About the sand rocks, and by the bog on Chailey North Common. 



