Neckerace^.] 206 [Alsia 



nerveless, entire, the inner overtopping the capsule, which is longish oval, 

 castaneous. Calyptra very small, whitish, lid conical with a short oblique 

 beak. Teeth of peristome lanceolate-subulate, converging into a cone 

 when moist, pale yellow, processes of endostome short, fugacious. 



Hab. — Trunks of trees, very rare. Fr. 3 — 4. 



On a beech tree at Fotheringham near Forfar (DnoHmond). Colin Glen, Belfast {D. Orr 

 1849), not found now. Balinore Woods, Argyll (Paterson 1875). 



4. ALSIA SuUiv. 



Proc. Amer. Acad. Arts & Sci. iii, 184 (1854). 



Main stem creeping, radiculose, defoliate at base, the branches pinnate, 

 flat when moist, circinately involute when dry, not glossy. Leaves small 

 ovate obtuse, the cells small and rounded. Capsule with a hairy vaginula, 

 elliptic, emergent from an elongated perichsetium ; calyptra cucuUate, 

 slightly hairy or smooth ; lid conico-rostrate, annulus none ; teeth 16 

 small, pale lineal-lanceolate, endostome a narrow membrane, sometimes 

 with short filiform processes. Inhabiting trees. — Der. An anagram of the 

 allied genus Lasia. 



The genus Leptodon was founded by Mohr on Hedwig's Pterigynandrum 

 trichomitrion and with it Lasia of Beauvois should probably be united. The 

 presence of an endostome and the curious curling up on drying are the chief 

 characteristics of Alsia. 



ALSIA SMTTHn {Dicks:) Lindb. 



Dioicous ; prostrate, pinnate or bipinnate, circularly involute when 

 dry. Leaves roundish-ovate, obtuse, entire, nerved to the middle ; seta 

 very short, capsule elliptical, lid rostrate. (T. CXXII, A.) 



Syn. — Hypnum Smilhii Dicks. PI. exsicc. no. 19 (1789), Crypt. Ease. II, 10, t. 5, f. 4 (1790). 

 With. Hot. arrang. 3 ed. iii, 851 (1796). Hedw. Sp. muse. 264 (1801). 



Ortholrichum Smithii Brid. Muse. rec. II, P. II, 33 (1801). 



Neckera bipinnata Schleich. Crypt, helv. cent IV, n. 20. 



Pterogonium Smithii Sw. in Schkad. Joum. ii, 173 (1801). Sm. F1. Brit. 1271 (1804), Eng. 

 Bot. t. 1326. ScHWAEG. Suppl. I, p. I, 105, et II, P. I, 31, t. 109 (1823). Hook. Tayu 

 Muse. Brit. 40, t. 14 (1818). Gray Nat. arrang. i, 728 (1821). 



Leptodon Smithii MoHR Observ. 27 (1803). Brid. Bry. univ. ii, 197 (1827). Hueben. 

 Muse Germ. 547 (1833). De Not. Syllab. 82 (1838), Epilogo 222 (1869). Br. Sch. 

 Bry. Eur. fesc. 44—45 (1850). Wils. Bry. Br. 317, t. 14 (1855). Schimp. Synops. 464 

 (i860), 2 ed. 562. Berk. Handb. 154, t. 13 (1863). Milde Bry. Siles. 280 (18^). 

 HoBK. Synops. 140 (1873). Juratz. Laubm. flora Oester.-Ung. 360 (1882). Boulay 

 Muse. Fr. 186 (1884). HnsN. Muse. Gall. 289, t. 82 {1892). Dix. James. Stud. Handb. 

 376 (1896). LiMPR. in Raben. D. kr. fl. Laubm. ii, 693, f. 332 (1894). 



Pilotrichum Smithii P. Beahv. Prodr. 83 (1805). 



