REVUE BRYOLOGIQUE 59 



Bryological Notes 



L 



1. Cifid'ulotus pachyloina sp. iiov. 



Fasciculato-ramosus, in caespites fasciculatos rigidos 

 olivaceo-vel rufescente-^irides congestus, caule ad 5 cent, 

 longo, fasciculato-ramoso, ad basin folioso, foliis undique 

 patentibus siccitate laxe imbricatis solidis rigidis ovatis 

 nervo excurrente plus minus longe cuspidatis, nervo valido 

 rufo dorso prominente, margine piano rufo integerrinio 

 vaide" incrassato multistratoso, folioruin cellulis parvis 

 irregularilerparenchymatosis saepe subquadratispapillosis 

 circiter 10 {x diam. Caetera ignota. 



Palria. Zahleh (Plantae Goele-Syriacae. Ex. Herb. Postian 

 apud colleg, Syriens. Protest, n'^ 781 ; in Herb. Kew.). 



A congeneribus omnibus rigiditate nee non foliorum 

 forma et margine valdius incrassato primo visu disLinctus 



From all the species of Cinclidotus hitherto des- 

 cribed (C. aciUifolUis Broth., C. aquaticns^ C fontina- 

 loides^ and C, riparitis) the present species is at once 

 distinguished by the shape of the leaf and the very strongly 

 thickened margin, — the latter twice as thick as inany of the 

 abovenamed species. The habit of the plant is wholly that of 

 CvicJidotus, hut it jnay be noticed that in the other species 

 of the genus the lower leaves are frequently worn away by 

 the water in such a way that only the bristlelike nerves 

 remain, while in 6\ pachylonta, under the same conditions, 

 the margins of the leaf (no doubt on account of their 

 thickness) as well a< the nerves remain on the stems with 

 the intervening part of the lamina worn away. The 

 papi!lo.>ity of the cells of the present plant is seen best in 

 comparatively young leaves, — in these the cells, even 

 those of the excurrent nerve, are found to possess one or 

 more papillae springing from the lumen. 



The young leaves of C. pachylonia have a curious 

 appearance/ due to the early vigorous growth of the 

 excurrent part of the nerve. The earliest rudiments of. the 

 leaves (fig. 7) are consequently almost linear in outline, 

 due to the thick- cylimirical nerve, the lamina being 

 represented by two minute wings at its base. The develop- 

 ment of the lamina of each leaf, therefore, takes place 

 almost entirely through intercalary growth. This order of 

 development is apparently usual for leaves with excurrent 

 nerves ; we find, e. g. the same sequence of growth of 

 nerve and lamina occurring in TorlnkuTmralis (fig. 11). 



Lorentz(Bot Zeit., 1869, p. 552j has described and figured 

 tlie structure of the nerve in the genus Cindidotus^ and 



