CESIA. 393 



tionofleaf x 200 (ditto). 14. Bract x G4 (ditto). 15. Perianth, 

 spread out x 24 (ditto). IG. Pistillidia x 85 (ditto). L7. 

 Spores X 290 (ditto). J 8. Elater x 290 (ditto). 19. Perigonial 

 bracts x 24 (Ben MacDhui, W. West). 20. Antheridium x 85 

 (ditto). 



2. Cesia revoluta {Nec><), Liiulh. 



Sarcoscyphus revolutus, Kees, Nat. Eur. Leberm. U, p. il'.' (l!S;5(;). 



Xardia revoluta, Lindb. Revis. crit. Fi. Dan. p. 113 (1871) ; Carr. in Grevillua, 2, 



p. -SH (1873). 

 Marsupellarevolata, Liudb. in Meddel. Hoc. F. Fl. Fenn. 13, p. 23S (1S<S(;). 

 Cesia revoluta, Lindb. in Arn. k Lindb. Muse. Asiae bor. p. (15 (1888). 

 Qymnomitr'mm revohftuvi, Philib. Eevue Bryol. (1890) ; Carr. ct Pears. Hep. 



Brit. Exsicc. n. 4 (18!)0). 



Dioicous, densely csespitose, small, black in colour. Stems 

 erect, simple, or slightly dichotomously branched, rhizomatous, 

 stolons with minute leaves ; radiculose, rootlets few ; leafless 

 below. Leaves approximate or subimbricate, accrescent on fertile 

 stems, distichous, patent to patent-divergent, semi-amplexicaul at 

 their narrow base, complicate-concave, oval or obovate, bifid to 

 about ^, sinus acute or obtuse, segments acute, margin of the 

 whole leaf remarkably revolute ; texture firm, epidermis papillose 

 on both sides, cells small, subquadrate or oblong-quadvate, walls 

 firm, no trigones nor thickened angles. Bracts larger than the 

 leaves, ovate, emarginate to about l or J, sinus and segments 

 obtuse, innermost bracts several, smaller, ovate, pale, delicate, 

 obtusely and irregularly lobed or subentire, margin plane. 

 Calyptra large, sterile pistillidia surrounding its base, never on its 

 apex. Pedicel exserted. Capsule spherical. 



Fruits Summer. 



Dimensions. — Stems from J to an inch long, '2 mm. diam., 

 with leaves 1' mm. to 2- mm. wide; leaves '9 mm. long x 7 mm. 

 broad, segments '^^ mm., 1' mm. x 75 mm., seg. 'S m.m., 75 mm. 

 X -G mm., seg. '2 mm.; cells '02 mm., "025 mm. x 0175 mm., 

 •015 mm., -025 mm.; outer bract 1-25 mm. long x T mm. broad, 

 segments *3 mm., 1*5 mm. x 1' mm.; innermost bract I" mm. 



