NECKERACEiE.] 220 [Hedwigia. 



2. CSTFH£A LAMTI {Montagne) Lindb. 



Dioicous ; robust, stems elongated, incurved when dry. Leaves broad 

 ovate, obtuse ; perich. bracts tapering into a serrulate acumen ; calyptra 

 short conical papillose, cucuUate. (T. CXXIV, D.) 



SyN. — Daltonia Lamyana Mont. Ann. Sci. nat 2 sen vi, 327, t 18 (1837). 



Cryphcca Lamyana C. Muell. Linnsea xviii, 680 (1844). HusN. Muse. Gall. 437 (1894). 

 Casus in Bull, de la Soc. bot. de France xli, p. cli (1894). 



Pilotrichum heteromallutn /S. aqiiatUe C. Muell. Synops. ii, 168 (1851). 



Cryphaea heteromalla var. aquatilis Wils. Bry. Br. 420 (1855). De Not. Epilogo 218 (1869). 



Cryphcea Lamyi Lindb. in MeddeL af soc. pro Faun. Fl. fenn. 1881, no. 6^ pp. 71 — 75- 



Cryphaa arborea p. Lamyana BouL. Muse. Fr. 188 (1884). 



Cryphcea heteromalla p. Lamyana HuSN. Muse. gall. 289 (1892). Limpr. Laubm. ii, 682 

 (1894), et iu, 804. 



Dioicous ; aquatic, much more robust, dingy green above, blackish below. 

 Stem decumbent, 2 — 4 in. long, straight when submersed, arcuato-recurved 

 when dry. Leaves imbricated when dry, horizontally patent when moist, 

 broadly oval, concave, obtuse, narrowed a little towards point, entire and 

 plane at margin ; nerved for | their length ; cells punctiform, arranged 

 in parallel longitudinal rows, transversely oblique in the inner perichaetial 

 bracts. Perich. bracts serrulate above ; outer oblong, lanceolate-acuminate, 

 nerved nearly to apex ; inner oval, nerveless ; seta very short, capsules 

 urceolate, shorter than in arborea, immersed, brown, in two rows ; calyptra 

 short, widely conical, papillose above, slit on one side, lower margin thin 

 and lacerate ; lid conical, recurvo-rostellate. Peristome shorter than in 

 C. arborea. 



Hab. — Submerged rocks in streams, sometimes on trunks of trees ; rare. 



On stones in the Dart above Hood Bridge, near Totness, Devon (^Rev. Mr, Toeer). Banks 

 of the Taw, Devon (7?nf. C. A.Johns). 



This excellent species has by nearly all bryologists been considered a variety 

 of C. arborea, yet the two differ in almost every particular, and no connecting forms 

 have been met with. It was first found by M. Lamy de la Chapelle in 1836, near 

 Limoges, in France, growing associated with Cinclidotus and Grimtnia rivularis, 

 and named after him by Montagne. Since that time its specific distinction has 

 only been recognised by Lindberg and M. Camus, and by C. Mueller with doubt. 

 In the admirable paper by M. Camus, the question is exhaustively treated, and, 

 we should consider, authoritatively settled. 



10. HEDWIGIA Ehrh. 



Hannov. Mag. 1781, p. 1095. 

 Growing on rocks ; stems dichotomous or irregularly branched, often 

 stploniferous, dense leaved ; the leaves octofarious, imbricated when dry. 



