LEJEUNEA. 63 



Ditto, postical view x 64 (ditto). 4. Ditto x 64 (Herb. Taylor). 

 5, 6. Leaves x 64 (New Forest, C. Lyell). 7, 8. Portions of leaf 

 x290 (ditto). 9, 10. Bracts x 64 (ditto). 11, 12. Ditto x 64 

 (Langley, Roper). 13. Perianth x 64 (New Forest, C. Lyell). 

 14. Male catkin x 64 (Coimbra, Portugal, Henriques). 15. 

 Antlieridium x 85 (ditto). 



13. Lejeunea microscopica, Taylor. 



Jungermania microscopica, Tayl. in Mackay Fl. hib. 2 p. 59 (1836). Taylor in 

 Hook. Journ. of Bot. 4, p. 97, t. 29. Nees, Nat. eur. Leb. Ill, suppl.p. 5GG 

 (1838). 



Lejeunea microscopica, Tayl. G. L. N. Syn. Hep. p. 315 (1844). 



Paroicous, loosely caespitose, minute, very pale green to white. 

 Stems creeping, very slender, Hexuose, pellucid, subramose ; radi- 

 culose, rootlets few, distant, short, single, pellucid. Leaves often 

 unilateral, distant, patent, ovoideo-fusifbrm or ovate-lanceolate, 

 somewhat flattened, slightly unequally bilobed, antical lobe a little 

 larger than the postical, apex subacute, triangular or shortly 

 linguaform ; epidermis papillose, in some specimens almost smooth, 

 texture pellucid ; cells smallish, 4-, 5-, and 6-angled, walls thin, no 

 trigones or thickened angles, near the base in the middle elongate. 

 Stipules absent. Female flowers on short branches, bracts unequally 

 bilobed, antical lobe narrower and longer than the leaves, ovate- 

 lanceolate, postical lobe much smaller, lanceolate acute. Perianth 

 pellucid, obovate or obconical, j^apillose, ecarinate or obtusely 

 angled, apex flat, no beak, mouth contracted. Andrcecia on short 

 lateral branches, perigonial bracts bilobed, more obtuse at the apex 

 than in the leaves. Antheridia oval. 



Dimensions. — Stems ^ inch long, -03 mm. in diameter, with 

 leaves '35 mm. wide ; leaves, antical lobe "2 mm. x '12 mm., posti- 

 cal '175 mm. x '12 mm., antical '175 mm. x '1 mm., postical 

 •16 mm. X -1 mm. ; cells "03 mm. x "025 mm., -03 mm. x "03 mm., 

 near base of leaf -04 mm. x '02 mm. ; bract, antical lobe '25 mm. 

 X "15 mm., postical "15 mm. x "05 mm. ; perianth "35 mm. x 

 '225 mm. near the apex. 



Hab. — On Fridlanm, bark of trees or on damp rocks, in shaded 

 or exposed situations. Extremely rare. 



