POTTIACEAE. 139 
late, nerve becoming indistinct and vanishing in the point. The spores are 
22-27 » in diameter. 
All the plants described by Brown appear to have been collected in the 
near neighbourhood of Christchurch, 
8. Pottia Stevensii R. Br. ter., op. cit., p. 291 (1894). 
Syn. P. Wright R. Br. ter., op. cu., p. 261. P. macrocarpa R. Br. 
vol. 
He dw., XXXvii, 132 (189 8). 
Distinct from the remaining species of Hu-Pottva with plane entire 
margins in having the nerve excurrent in a mucro or cuspidate point. 
P. macrocarpa and P. Whittonii are only forms of P. Stevensii, differin 
very slightly at most in the length of the seta and the size of the capsule. 
I should judge also from the rather featureless description of P. reticulata 
C. M. that it refers to the same moss; and this is entirely confirmed by 
the fuller description and oer given ‘by Warnstorf (Hedwig., lviii, 123). 
Paris changed the name of P. macrocarpa to P. Brownii owing to the 
existence of P. macrocarpa 4 Bohiti mp. 
have no hesitation further in identifying with it the plant described 
by Brown later as Trichostomum ligulatum, which is found in_ his 
peha (as T. ligulatifolium). This si agrees with P. Stevensit. 
EXCLUDED SPECIES. 
Anacalypta Stevensii R. Br. ter. (op. are vol. 30, p. 413, 1898) is Fissiden. 
Taylori C. M. The specimens ns in Bro s herbarium are quite conclusive ; 
they are unmixed, and in fair dainty ” There are none of the sterile stems 
among them, the capsules are mostly old with the peristome fragmentary, 
and the minute vaginant leaves with very little of the Fissidens character 
apparent have misled Brown entirely. Brown himself, it will be noted, 
was perplexed over the bifid peristome teeth. 
Crossipium Jur. 
ee Siabis Tort 
Crossidium Geheebii ia. ) Broth. in Engler and Prantl, Pflanzenfam., 
Musci, i, 426. 
Syn. Tortula Geheebii Broth. in Oefv. af Finska Vet.-Soc. Férh., xlii, 
114 (1902). 7. chloronotos H. f. & W., Fl. N.Z., ii, 69; Handb. 
very closely pnegien to the northern C. chloronotos, but 
