Musci, by W. Wilson.) FLORA OF TASMANIA. 205 
1. Omalia falcifolia (Hook. fil. et Wils. Fl. N. Zeal. 115. t. 92. f. 1); dioica, surculo vage sub- 
pinnatim ramoso, ramis complanatis subsimplicibus, foliis distiche imbricatis oblongo-acinaciformibus ob- 
tusis enerviis integerrimis, seta levi, capsula elliptico-oblonga nutante, operculo conico.—Hypnum falci- 
folium, Nob. in Lond. Journ. Bot. 1844, p. 554. 
Has. Tasmania. (Barren specimens only.) (Gunn.) 
Distrıg. New Zealand. 
Gen. LIII. TRACHYLOMA, Bridel. 
Peristomium duplex ; exterius, dentes 16, angusti, subnodulosi, duri; inferius, cilia totidem cum lis . 
alternantia, e membrana brevi orta, angusta, carinata, nodulosa. Calyptra cuculliformis. Capsula erecta, 
oblonga, subzequalis, curvula, exannulata.—Folia sudenervia, complanata, Habitus dendroideus. Caule 
repente. Surculo superne pinnatim ramoso.—Fl. N. Zeal. p. 103. 
l. Trachyloma planifolium (Neckera planifolia, Hook. Musc. Exot. t. 23); dioicum, surculo 
erecto pinnatim ramoso, ramis complanatis, foliis distiche imbricatis erecto-patentibus ovatis apice serratis 
subenerviis, capsula erecta subcylindrica, operculo conico subulato.—Bridel, Bryol. Europ. ii. 278 ; Mitten, 
in Journ. Linn. Soc. ined. 
Haz. On dead trees, in the forests of the Esk River, Mossman. 
Dsg, New Zealand. 
Tribe XXII. IsoTHECIACEA, 
Gen. LIV. ISOTHECIUM, Bridel. 
Peristomium duplex ; externum, dentes 16, ut in Hypno ; internum, membrana in processus 16 cari- 
natos cum vel absque ciliis interpositis profunde divisa. Calyptra cuculliformis. Capsula erecta, equalis, 
vel e curvatura pedicelli cernua, subeegualis, annulata.— Habitus dendroideus. Rhizoma repens. Surculi 
inferne nudi, rigidi, superne pinnatim ramosi. 
$ 1. Fronde diffusa, suberecta. 
l. Isothecium Arbuscula (Hookeria, Smith, Linn. Trans. ix. p. 280. t. 23); dioicum, surculo bi- 
pinnatim ramoso, foliis imbricatis patentibus ovatis concavis integerrimis basi obsolete binerviis, seta brevi- 
uscula flexuosa, capsula ovata suberecta vel cernua, operculo conico.—Hypnum Arbuscula, Hook. Musc. 
Exot. 112; Schwegr. Suppl. t. 300. 
Var. 8. deflerum ; surculo laxius ramoso arcuato deflexo apice radicante, foliis remotioribus acutioribus 
minus concavis.—Stereodon (Isothecium) deflexus, Mitten, in Journ. Linn. Soc. ined. ` ` 
Has. On trees, in dense forests. (Gunn, 42, 43, 1595 a.) St. Patrick's River. (Gunn, 1595 £, 
1596.) Johnny's Creek, Back River Gully. (Oldfield, 87, 88.) 
Disrris. New Zealand. 
2. Isothecium gracile (Hook. fil. et Wils.) ; dioicum, caule ramoso, ramis gracilibus recurvis, foliis 
erecto-patentibus secundis ellipticis concavis obtusiusculis subdenticulatis enerviis, perichztialibus sguar- 
rosis acuminatis, seta longiuscula levi, capsula ovata cernua, operculo conico.— FF. Antarct. part 1. p. 29. 
t. 61. f. 3; FI. N. Zeal. p. 106, et Hypnum gracile eorund. l.c. p. 112. Stereodon (Isothecium) gracilis, 
Mitten, in Journ. Linn. Soc. ined. 
Haz. On stones, in rivulets: Jackey's Plain Creek, near Cheshunt, Archer. 
Disrrrs. Lord Auckland’s Islands, New Zealand. 
VOL. II. 
36 
