NO. 2 .MOSSES OF AFRICAN EXPEDITION DIXON 1 7 



Africa, in the volcano region at heights of 3,200 meters and 4,000 

 meters. The sporophytic characters are identical with those of R. 

 alarc, including the unusual character of the perichaetial leaves. In 

 fact the plants are extremely closely allied to one another, though 

 the long hyaline points of the present species give it a very different 

 appearance. The difference between the two is practically that — 

 and only that — which exists between the European R. heterostichum 

 (Hedw.) Brid. and R. afUne (Schleich.) Lindb. 



ORTHOTRICHACEAE 

 AMPHIDIUM CYATHICARPUM (Mont) Broth. 



Zygodon kilimandscharicus C. M. Flora 73: 482. 1890. 



Loc. 3,630 meters, No. 1580c. In very low, soft, dense tufts with 

 Isopterygium sericifolium sp. nov., etc. I have found J 1 flowers 

 aggregated towards the apex of the short stems, but have not seen $ 

 flowers or fruit. C. Miiller in describing his Z. kilimandscharicus 

 writes "An Oncophonts (RJiabdowcisia ) cyathicarpus Mitt, in 

 Journ. Linn. Soc. 1886? " There is no doubt at all that the identifica- 

 tion is correct, and equally there is none that Mitten is correct in refer- 

 ring the African plant to the species described by Montagne from 

 Chile, which is distributed throughout a great part of the South 

 Temperate zone and the mountainous parts of the subtropical zone. 

 C. Miiller does not suggest any difference in his specimens from 

 these unless it be the leaves denticulate throughout their length ; but 

 this character is no more marked in the African than in the South 

 American plant, while the same rather remarkable variability in this 

 character appears in both. The leaves may be absolutely entire from 

 base to apex ; they may be — on the same tuft or even sometimes on 

 the same stem — slightly sinuate-denticulate either at apex or for a 

 greater or less part of their length ; or they may be minutely and 

 distantly but quite sharply and distinctly denticulate from apex to 

 just above the basal part. All these forms of toothing — or its 

 absence — may occur even on the leaves from a single stem. Zygodon 

 kilimandscharicus must certainly fall into the synonymy of Am- 

 phidiun 1 cya thicarpu m. 



SPLACHNACEAE 

 TETRAPLODON BRYOIDES (Zoeg.) Lindb. 



Tetraplodon mnioides (Sw.) Bry. eur. 



Loc. 3,630 meters, No. 1587, c. fr. In short, extremely dense tufts, 

 with numerous capsules, which are only slightly exserted above the 

 leaves of the tuft. The leaves are highly concave, and I should be 



