18 TASMANIAN BRYOPHYTA, 



ed, ovate, with a narrow base and acute apex, 4 m.m. ; very 

 crisped when dry, bearing gemmae on the upper surface ; 

 midrib red, slender, excurrent in a short or long cuspidate 

 point. 



On branches of trees, Mt. Wellington, Mt. Roland. 



WEISSIA (Hedw). 



Small, simple, erect, usually grouped in caespitose 

 patches. Leaves narrow, with a well-developed rib, vanish- 

 ing near aj)ex, or shortly excurrent, papillose and opaque, 

 rarely smooth and transparent; cells small, quadrate, in- 

 crassate, those below rectangular thin walled. Capsule 

 oblong, erect, or slightly inclined, with a thickened annu- 

 lus; calyptra cucullate, lid rostrate; peristome of 16 irre- 

 gular, short, entire, perforate or cleft, erect, teeth, or 

 absent, mouth is then often closed by a membrane. 



Gymnostomous. 



Nerve vanishing •••... calcarea. 



Nerve excurrent •••... weymouthi. 



With a peristome. 



Nerve vanishing. 



Cells nodulose •• • .microcarpa 



Cells smooth bicolor. 



Nerve excurrent flavipes. 



WEISSIA CALCAREA, CM. 



Syn : Gymnostomum calcareum, Nees. 



Very small, caespitose in a fiat mass. Stems seldom 

 exceeding 2 m.m. Leaves erecto-patent, spathulate, ratner 

 obtuse, 1.5 m.m.; nerve well-developed, vanishing in the 

 upper portion ; cells quadrate, incrassate, prominently pap- 

 illose, rectangular and thin-walled below. Seta about 5 

 m.m. ; capsule slightly inclined, narrow, oblong, constrict- 

 ed below the narrow red annulus, 1 m.m. ; lid rostrate half 

 to as long as capsule ; peristome none ; mouth furnished 

 with a nari'ow membraneous border. 



On damp rocks in shade. 



