218 TASMANIA^ BKYOPHYTA, 



R.S. TAS. 



Differing from Sterpodon in the broader base of the 

 leaves, absence of quadrate alars, besides habit. 



Leaves secund Innitum 



Leaves straight acuminatum, 



Isopteryylum lifnitu??i (H.f. et W.) Broth. 

 Syn. : Stereodon limalus (H.f. et W.) 



Decumbent or suberect. the stem not widely spreading, 

 branches many, vague, erect, equal, incurved at the aperi, 

 often decumbent when dry. dull greenish vellow. Leaves 

 secund, shining, lanceolate, froin a very broad base taper- 

 ing nearly equally to the acute apex, concave, incurved, 

 L2 mm.; margin plain; nerve none; cells long fusiform, 

 those at the basal angles not distinct; perichaetials lan- 

 ceolate, erect, points slender but not elongated. Seta 2 

 cm. ; capsule erect or slightly inclined, slightly bent, oblong, 

 up to 2.7 mm. ; lid conic, obtuse or nearly so. Peiistome 

 teeth slender, rather strongly barred ; lower half of endos- 

 tome a membrane, upper half of linear processes sometimes 

 perforated, no^ cilia. 



Very common on deadwood. 



Isopterygium acuminatum Bosw. 



Small, decumbent. Leaves lanceolate from a broad base 

 tapering into a piliferous apex, inserted irregularly in five 

 series, patent, about 1 mm., margin plain; nerve none; 

 cells very long, delicate, one line of quadrate cells at the 

 base. Rest not seen. 



West Coast, Meander at Western Tiers. 



Plagiothecium Schiuip. 



Stems decumbent with few irregular branches, flat. Leaves 

 ovate to lanceolate, oblique, obliquely ir)serted, upper and 

 lower series erect and appressed, laterals patent, shining, 

 smooth; nerve double, often united below, obsolete or 

 none; cells long, fusiform, thin walled. Seta slender; 

 capsule cylindric with a tapering base, inclined, curved; 

 peristome pale yellow ; exostome teeth slender lanceolate, 

 densely a,rticulated ; endostome membrane deep, processes 

 long, slender ; cilia usually one, sometimes none. 



Distinguished by the complanate habit and oblique 

 leaves. 



Plagiothecium lawjn'ostachys Hpe. 



Pale green, delicate, 2-5 cm. Dorsal and ventral leaves 

 erect, apjjressed ; lateral leaves patent, broadly ovate, 



