DESCRIPTION OF A SPECIES OF ANDREJEA NEW 

 TO SCIENCE 



(Andresea commutata Limpricht). 



Bv GUSTAV LIMPRICHT. 

 (Translated from the 6i Jahresbericht der Schlesischen Gesellschaft (1884), and 

 read before the Manchester Cryptogamic Society, by W. H. Pearson.) 



Synonymy. Andrecea falcata Raben. eur. n. 1301 a et b sed non 

 A. falcata Schimp., Bryol. eur., tab. 634. 



Monoicous. In habit near to A. crassinerina. Grows in opaque or 

 slightly glossy black tufts; stems i| — 2^ cm. long; generally loosely 

 leaved. Leaves strongly falcato-secund, long (i '5 — i '8 mm.), gradually 

 tapering from a short ovate and single-layered base (0*3 — 0*36 mm. 

 broad) to a subulate apex of which the lower part consists of several rows 

 of cells and a double-layered lamina, the upper part alone being com- 

 posed entirely of the nerve. Nerve very strong, flattened below 

 consisting of 2 and 3 layers, occupying about the third of the breadth 

 of the leaf; a little higher composed of up to 7 layers, strongly convex 

 at the back, the apex biconvex, 4 and 5 layers. Cells in the lower 

 portion of the leaf small (0*007 ^.nd 0*006 mm.) roundish quadrate. 

 Male flowers small, ultimately pseudo-lateral, often below one another 

 on the slender laxly-leaved branches ; inner perigonial leaves nerve- 

 less, crenulate at the margin and strongly papillose at the back. 

 Antheridia large, 0*38 — 0*45 mm. long. Pedicel short (0*035 i^"'™-)- 

 Paraphyses of the same length, yellow, filiform (not ligulate) some- 

 times branched. Inner perichfetial leaves convolute, larger, obovato- 

 oblong above rotundate with very small, apiculate or ligulate apex, 

 single layer, nerveless (only at the base a flattened nerve of 2 layers 

 is indistinctly noted), margin crenulate at the back, large papillae. 

 Capsule large unopened 1*05 mm. long by 0*5 mm. broad, with a 

 thick neck (0*3 mm. long). Spores large (0*032 — 0*035 0*04 

 mm.), in the mass ochre-coloured, seen by transmitted light greenish- 

 brown, very finely granulate. Ripens in April. 



Collected on rocks of the Ockerthal in the Hartz, April 1876, by 

 Pastor W. Bertram, and contributed to Raben. Bryoth. eur. n. 1301 b. 

 (The specimens which Pastor Bertram sent to the Silesian 

 Botanical Exchange Society, from the same station, belong to A. 

 Rothii var. and are largely mixed with And?', petropliila). Near 

 Willerzie, Belgium, on quartz rocks, leg. Y. Gravet (Rabenh. Bryoth. 

 n. 1 30 1 a.). Britain*. — rocks, Loch Kandor, Braemar, leg. G. E. 

 Hunt, July 187 1 : Borrowdale, Cumberland, leg. G. E. Hunt, May 

 187 1 : and rocks near Buttermere, leg. G. E. Hunt. From the last 

 station, sent as A. rupestris. 



The specimens from Bernina, leg. Scliimper, and from the Hartz 



Dec. 1884. 



