POTTIACEAE. 14} 
24 Leaves wide above, broadly pointed, coarsely toothed above, cells 7-10 u 
10. serrata, 
Leaves cz Whe acuminate, ae in upper part, cells 5-8 u -- 9 serrulata. 
(N current in a yellowish poin 5 
an: soeaty widely padre Sy nerve , excurrent in a red or hyaline arista 6 
P| Leaves widely spathulate, concave, nerve pander excurrent in a ee noe 
ea 
Leaves narrowly acuminate, nerve excurrent in a ‘stout rigid euspicate poin 
Hainer 
( Leaf-point variable, usually somewhat acute, arista short, red, or yin 
6. + tip only eS le cian 
| Leaves spatial obtuse, arista hyaline for most of its length Ha c 
7. ¢ Plants and leaves small, arista short, smooth or almost so . as a2. eval 
? Plants and leaves larger, arista long, denticulate : +. 13. prin 
§ Tortula sensu stricto. 
1. Tortula atrovirens (Sm.) Lindb. de Tortul., p. 236 isely’ 
yn. ae atrovirens Sm., Eng. Bot., xxviii, t. 2015 (1809). 
Desmatodon nervosus Bry. eur., fasc. 18-20, p. 6, t. 132; 
nd ot ae } 
folium R. Br. ter in Trans. N.Z. Inst., vol. p. 484. 
Tr. apiculatum R. Br. ter., op. cit., p. 484. t. Seareilit R. Br. 
ter., op. cit., p. 484. Tortula minuta R. ti OB Ces 
vol. 30, p. 404. Tort. oamaruensis R. Br. ter., = cit., vol. 35, 
. 338. Tort. arida R. Br. ter., op. cit., _ 338. 
Distinct from all the remaining species of Tortula, except the next, in 
the very small size, very smal] oblong-spathulate leaves with a stout nerve 
capsule with shortly beaked lid, and imperfect peristome. The next species 
differs in the erect margin and smaller spores. The thickened nerve and 
recurved margin will together separate it easily from species of Pottia, which 
in habit it resembles more nearly than it does most species of Tort ula. 
The sixteen peristome-teeth are erect, united at base into a granulose 
ring, each divided into two filiform branches, which are oft torev 
wanting, and sometimes articulated together. On — st the filiform 
branches the species has been removed from Desm which genus 
as now restricted the teeth are broadened and rng not Gliform. The 
present species may be sania to unite Tortula wi 
t is very variable in dimensions as well as in me desetaticacak of ee 
peristome. 7 vichsdosndion Searellii R. Br. ter. is a robust wi 
attaining din.; Tr. apiculatum is a small form. Tortula oamaruensis is not 
ound in Brown’ s hag at but the deseription and figures leave no 
doubt of its.identity. It is one of the small forms. The other species 
cited above are there, and must also be se rred here. The species is 
found in both North and sont: Islands. 
2. Tortula submutica Broth. in Oefv. af Finska Vet-Soc. Férh., Bd. xl, 
p- 167 (1898). 
I have not seen this plant. According to the description it differs clearly - 
from the last in having the leaf-margins erect, the eng incurved but 
scarcely contorted when dry, the spores only 12 in diam 
e localities given are ~“ Queens town. Lake Maat. et Anderson’ s 
Bay, ef rupes siccas (W. Bell).” 
