EURHYNCHIUM. 429 



Allied to the last species, but differing in habit, the more pointed, less concave 

 leaves, non-julaceous branches, and other points. It resembles Brachythecium 

 •velutinum, in appearance, but has wider, less longly acuminate leaves, the seta 

 smooth, the lid long-beaked, etc. 



19. Eurhynchium megapolitanum Milde (Hypnum mega- 

 politanum Bland. ; Rhynchostegium megapolitanum B. & S., 



Schp. Syn.) (Tab. LV. A.). 



Allied to E. confertum, of which it has been considered a 

 variety ; much more robust, in looser tufts, not adhering to the 

 substratum by radicles; divisions long, 1-3 inches, more branched; 

 pale or yellowish green, shining. Leaves more or less closely 

 imbricated, appressed or divergent when dry, larger, %.-i line 

 long, rapidly narrowed and constricted at base, decurrent, widely 

 ovate, rapidly narrowed to a rather long, narrow acumen ; 

 branch-leaves narrower, ovate-lanceolate, acuminate. Areolation 

 resembling that of E. confertum, or rather wider, the angular 

 cells more numerous and more distinct, usually opaque, often 

 reaching to the nerve. Seta usually longer, often attaining 1 inch, 

 or more, flexuose ; capsule narrower. 



Hab. Stony and sandy ground, rarely on walls. Rare. Fr. winter. 



Although allied to the last this appears to be sufficiently distinct, and is so 

 different in habit that it is not so likely to be mistaken for that as for some other 

 species, e.g., certain species of Brachythecium. It is, however, usually to be found in 

 fruit, and there is then no difficulty in recognising it ; and when barren may generally 

 be known from any of the above-mentioned plants by the form of the leaf and basal 

 areolation, which is more distinctly marked off from the rest of the cells than is usual 

 in Brachythecium. The leaves are sometimes spreading and sub-complanate, some- 

 times densely imbricated and appressed so that the branches are terete. 



It occurs, perhaps most frequently, on sandy and stony sea-shores. 



20. Eurhynchium rotundifolium Milde (Hypnum rotundi- 

 folium Scop. ; Rhynchostegium rotundifolium B. & S.) 



(Tab. LV. B.). 



In small, soft, straggling tufts, stems creeping, with 

 irregular, arched or suberect branches, slender, dull green. 

 Leaves loosely imbricated, when dry not appressed but shrinking 

 and twisted, soft and flaccid, ovate or rounded-ovate, shortly 

 pointed, faintly denticulate above, not concave, nerve thin, 

 reaching to middle ; areolation very lax and wide, thin-walled,, 

 rhomboid-hexagonal, 12-15 p wide, 3-5 times as long, laxer and 

 sub-rectangular at base, but not distinct at angles. Seta short,. 

 capsule small, oval-oblong. Autoicous. 



