﻿MOSSES FROM MiTTEN's HERBARIUM 95 



"Dicranum Billardieri," but this could hardly have reference to 

 the present plant, which has no resemblance or affinity to that 

 species. It was under the same cover with Dicranum pumilum 

 Mitt., from Hermite Island, showing that Mitten had recognized 



The capsules are too old for the peristome to be properly 

 examined, and I am in some doubt as to the proper place of the 

 species. It appears in some respects to be intermediate between 

 the sections Arctoa and Holodontium. The inflorescence is not 

 certainly autoicous. The only cf flower I have seen was on a 

 stem which certainly showed no immediate signs of producing a 

 perichaetium, though the d^ flower itself was fully developed; 

 it appeared to be lateral, but might very well have been originally 

 terminal with the stem prolonged by innovation. 



It appears to be most nearly allied to the Hermite Island D. 

 pumilum, which is also a New Zealand species. That, however, is 

 a plant of denser growth, with closer, shorter foliation, and a quite 

 different leaf acumen, which instead of being gradually and finely 

 subulate is (while very narrow) flattened and remaining of some 

 appreciable width to the very point, and as it often has an in- 

 conspicuous twist just below the apex, bringing that part of the 

 subula into (narrower) profile, it frequently gives the impression 

 of the tip being actually widened. The upper cells in D. pumilum 

 are comparatively wide and short, so that the nerve is easily 

 distinguished from the rest of the lamina, instead of being almost 

 indistinguishable as here. The sporophyte is very similar in 

 both species. 



I know of nothing else like it among the antarctic species. D. 

 ramulosum Mitt, differs in the shorter seta ("2-linearis") and- — 

 e descr. — markedly in the branching. 



Didymodon calycinus Dixon, sp. nov. 

 Plate 9, figure 3 

 Terrestris; caules inter muscos et hepaticas aggregati, circa 

 I cm. alti, simplices vel infra flores parce ramosi. Folia juniora 

 pallide viridia, senectute fuscescentia, sat conferta, omnia sub- 

 aequalia, erecto-patentia, sicca subcontorta, brevia, 2 mm. longa 

 vel paullo ultra, e basi latiuscula breviter lineari-lanceolata vel 



