Supplement.] 230 



EPHEMERUM STELLATUM Philib. 



Dioicous ; plants minute, simple and scattered. Leaves numerous, 

 spreading from an oval base, linear acute, entire, cells at base large 

 hexagonal, with a round swelling on both surfaces. Capsules oval, pointed. 

 (T. CXXV, F.) 



Syn. — Ephemerum stellatum Philibert in Rev. Bryol. 1879, p. 62. Boulay Muse. Fr. 577 (1884). 

 HusN. Muse. gall. 208, t 56 (1^84). Limpr. in Rabenh. D. kr. fl. Laubm. iii, 634 (1901). 

 Nicholson in Joum. Bot. 1902, p. 337, t. 442 (1902). 



Dioicous ; the plants very small, simple and isolated as in E. serratum. 



Leaves about 20, squarrosely divergent, stiff, plane and straight, oval at 



base, suddenly linear, acute, nerveless, entire ; cells at base hexagonal, 



with a thick round swelling, convex on both surfaces and filled with opaque 



granules, the upper much longer than broad. Capsule oval or globose, 



orange-brown, pointed at apex, rather smaller than that of E. serratum. 



Calyptracampanulate, covering | of capsule, with 2 — 3 slits at base ; spores 



smooth, smaller than those of E. serratum. 



Hab. — Damp clay soil, very rare. Fr. 10 — 11. 



Bedgbury woods, Kent, with E. serratum 1901, and Crowborough, Sussex, 1902 (W. E. 

 Nicholson, Esq.'). 



This elegant little moss is quite distinct from E. serratum and of much firmer 

 substance, the leaves also are of a diflferent shape. The large circular swelling on 

 a number of the basal cells is most unusual and a striking feature of the plant. 

 Bridel has a Phasum stellatum sent by Green from Shrewsbury — Mant. muse. 4, 

 et Bry. univ. i, 24 — described as having a stout nerve, and probably a form of 

 P. acaulon. 



POTTIA COMMUTATA Limpr, 



Paroicous ; leaves longish oval, margin recurved narrowly above, nerve 

 excurrent in a short recurved point, cells thickly papillose. Capsule 

 cernuous, longish oval, calyptra papillose, lid obtusely conic with a small 

 boss ; peristome yellowish, the teeth very short, obtuse, of 2 — 3 joints. 

 (T. CXXV, B.) 



Syn. — PoUia commutata Limpr. in Raben. D. kr. fl. Laubm. i, 537, fig. 160 (1888). 



Paroicous ; resembling P. Starkei, growing gregariously, light green. 

 Upper leaves longish oval with a short point, margin narrowly recurved 

 above, nerve orange, excurrent in a short recurved point ; cells above 

 hexagonal, thickly papillose, below rectangular and smooth. Perich. bracts 

 elliptic, seta yellow curved. Capsule cernuous, longish oval, castaneous, 

 slightly plicate when the lid has fallen ; calyptra yellowish papillose, lid 

 obtusely conic with a blunt central boss ; peristome pale yellow, the teeth 

 very short, and of 2 — 3 joints, papillose and often perforated ; spores 

 strongly papillose. 



