Musci, by W. Wilson.] FLORA OF TASMANIA. 18] 
Disrris. South Australia. (O. Prentice, Esq.) 
Stem 2 lines long. Leaves crowded, yellowish-green; margin subreflexed ; upper areole quadrato-punctiform, 
lower ones rectangular. Seta 2 lines, pale. Annulus large. Spores brownish. Male flowers aggregate, gemmm- 
form, axillary.—Closely allied to P. crassinervium (Schimper), but differs in the peristome, and in the larger areole. 
P. Drummondii is smaller, and has no annulus; and from P. crispata our Moss differs in the acute tapering leaves. 
—PrarE CLXXIIL Fig. 2; 1, fruiting specimen; 2, leaf; 3, capsule; 4, teeth; 5, calyptra :—all magnified. 
2. Ptychomitrium serratum (Mitten, in Linn. Soc. Journ. ined.) ; “ P. polyphyllo minor, foliis 
patenti-recurvis e basi ovata lanceolatis sensim acutis margine apicem versus serrato inferne recurvo, nervo 
percurrente, cellulis basi paucis elongatis mox in rotundatis a sese remotiusculis diametro circiter 4! 
uncize metientibus transeuntibus, perichetialibus caulinis similibus, theca in pedunculo guadrilineari ovali- 
cylindrica, operculo subulato subequilongo, peristomio dentibus longiusculis rubris asperulis profunde fissis 
basi geminatim approximatis, calyptra P. erispati.” (Tas. CLXXIII. Fig. 3.) 
Has. On rocks: north side of the Cataract, Launceston, Archer. 
In size and habit so nearly resembling P. acutifolium as to be readily mistaken for it, but safely distinguished 
by the serrated leaves, which are shorter and less narrowed towards the apex than those of P. polyphyllum. 
Mitten, l.c.—PLATE CLXXIII. Fig. 3; 1, capsule, with calyptra; 2, leaf; 3, teeth :—all magnified. 
Gen. XXII. RACOMITRIUM, Bridel. 
Peristomium simplex; dentes 10, bi-trifidi; crura nunc filiformia, longissima, ad basin usque libera, 
nune breviora, lineari-subulata, inegualia, irregulariter coalita. Capsula in pedicello strictiusculo exserta, 
elliptica oblongave, levis, ore angustata, annulata. Opereulum conico-subulatum. Calyptra conico-mitre- 
formis, ad apicem subulata, basi membranacea pluries fissa, apice solida, papillosa, operculum tegens.— 
Florescentia dioica. Folia evanidinervia, carinata, margine recurvo. Reticulatio ex areolis superne gua- 
dratis vel elongato-sinuosis, inferne longioribus, angustis, valde sinuosis. Habitus a Grimmoideo ad Hyp- 
noideum Zransitionem metiens. Habitatio terrestris et rupestris. 
1. DRYPTODON.— Plante dichotome ramose, innovationibus simplicibus, fastigiatis. 
l. Racomitrium (Dryptodon) crispulum (Hook. fil. e& Wils. Fl. Antarct. 124. t. 57. f. 9); foliis 
erecto-patentibüs subrecurvis ovato-oblongis acuminatis carinatis margine basi reflexa apice subdiaphanis, 
- nervo continuo, seta perbrevi, capsula elliptico-oblonga, operculo conico-subulato, peristomii dentibus bifidis 
siccitate reflexis.—/F/. N. Zeal. p. 19. 
Var. 1; foliis brevioribus muticis. 
Var. 2; foliis longioribus muticis. 
Haz. Var.l. On trap rocks near Glen Leith, rare. On stones near Lake Echo, J. D. H. Var. 2. 
St. Patrick's River. (Gunn, 1608, 1627, 21.) Rocks: North and South Huon. (Oldfield, 62.) On rocks 
and stones: rivulet near Cumming's Head, Western Mountains, Archer. 
Disrris. Antarctic Islands, New Zealand. 
2. RACOMITRIUM.— Plante irregulariter ramose, ramulis brevibus, innovationibus haud fastigiatis. 
2. Racomitrium symphyodon (Grimmia, C. Mueller, Syn. Musc. i. 809) ; caule gracili elongato, 
ramulis subfasciculatis gracilibus, foliis patentibus subsecundis siccitate erectis ovato-lanceolatis acuminatis 
hyaline apiculatis margine inferne recurvis, perichetialibus acutiusculis, capsula in pedunculo flavido tenuis- 
simo breviusculo cylindriea microstoma, peristomii dentibus brevibus cruribus coherentibus, calyptra 
apice scabriuscula.— R. fasciculare, var. 2 and 3, Hook. fil. et Wils. in Fl. Antarct. p. 96. Grimmia 
VOL. II. 9A 
