554 S. O. Lindberg. 



Snowdon ab eo lecta, hoc organo, quantum nunc commemoramus, omnino 

 carent, ut verisimile sit sporogonium nionstrosum vel male evolutum vel oper- 

 culum Isesum descriptum esse: „operculis ohhisis'-'- (Dillenius) vel ^,operculum 

 hemisphœriciim vet convexiim nmticum'-'- (Smith). Hic oculatissimus vir solam 

 certissimam plantam Dillenii vidit, qua causa nulla dubia de identitate iclicta 

 sunt, prsesertim quum nunnulla sterilia individua ejus authentica in herbario 

 nostro asservemus. Stirps, quam in coUectione Dillenii examinavimus, mera 

 est sine uUis vestigiis alius musci intermixti. Nomen antiquum ohtusiim re- 

 tinemus, licet operculum nullo modo est obtusum, sed ob folia semper obtusa 

 et imberbia, qua nota optinie e Rh. afflni proxinio distinguitur. 



„ We are not abte to détermine Trichostomum obtusum Smith, Fl. Brit. 

 1244, Dill. Musc. t. 47, f. 30, which, indeed, as Bridel justly remarks 

 (Bryol. univ. 1, 193), very tittle accords ivith Trichostomum paténs, although 

 the spécimen in the Dilleuian Herbarium has hecn repeatedly pronounccd to 

 be tJiat möss by compétent observers. Possibly Dillenius may have had in 

 viem Rhacomitrium heterostichum var. y. gracilescens of Bruch and Schimpee, 

 rvhich has muticous leaves, and smalt oblong capsutes, scarcety larger than 

 those of Rh. sudeticum. According to a remark of Sir J. E. Smith, in Engl. 

 Bot. t. 1901, Dillenius has confounded Rh. sudeticum nith Rh. ellipticum, 

 hut no évidence of this is observable in the figures above cited.'-'- — Wils. 

 Bryol. brit. p. 167, n. 4, in nota. 



8. Rhacomitrium aquaticum Brid. (Bryol. univ.!). 



Max"go foliaris hand incrassatus. Nervus bene definitus, crassiusculus, 

 applanatus, dorso bene prominens, in summo apice dissolutus, antice canali- 

 culatus, inferne quadri- vel tristratosus, quorum celluhc omnes subajquimagnse. 

 anticaî 8 — 6, intermedise 10 — 8, posticai 16 — 12, supra medium folii a duo- 

 bus stratis cellularura, quarum anticai vulgo 5, posticai 7 vel 8. Cellulse 

 foliares ad parietes longitudinales connatos suos bipapillosa?. 



Hypnum cauähus (eretihus, foUis lanccolatis i?nbricatis, capsuUs ercclis ovatis arislatis Hall. 



It. hercyn. n. 30, fig. 2 (1738)? 

 Bryum aciculahforme Eheh. Mss. Hoffm. Deutschl. Fl. 2, add. p. 6 (1796)? 

 Tridwslomum aquaticum Biud. Muscol. rec. 2, P. 1, p. 132, n. 109, excl. synou. (1798)? 

 Licranum suhulatum Röhl. Moosg. Ueutschl. 1. p. 347, n. 95, excl. synon. (1800)? 

 Dicranum aciculare var. y. gracile Turn. Musc. hib. spie. p. 67 (1804). 

 Dicranum aquaticum Brux Sp. musc. 1, p. 190, excl. synon. (1806)? 



Trichostomum fascicularc (non Schrad.) Moug. N. St. crypt. vog.-rhen. fasc. 3, n. 21.5 (1812). 

 Rhacomitrium aquaticum Brid. Mänt. p. 80, n. 278, excl. synon. (1819)?, et Br. univ. 1, 



p. 222, n. 13, excl. synon. (1826)! 



