64 PATAGONIAN EXPEDITIONS I BOTANY. 



Catagonium politum (Hook, et Wils.) C. Mull., Rhacomitrium lanugtno- 

 sum (Hedw.) Brid., Rhizogonium mnioides (Hook.) Sch., and R. subbasi- 

 lare (Hook.) Sch., Bryum bimum Schreb., Leptobryum Pyriforme (Hedw.) 

 Sch., Webera cruda (L.) Schwaegr., Distichium capillaceum (L.) Br. Eur., 

 Aulacomnwm palustre (L.) Schwaegr., Orthotrichum rupestre Schleich., 

 Lepyrodon lagiirus (Hook.) Mitt, and L. implexus (Kze.) Par., and Brachy- 

 thecium paradoxum (Hook. fil. et Wils.) Besch. 



Apart from new species, nearly one third of Hatcher's mosses are also 

 found outside of the district now in question, in other temperate parts of 

 the southern hemisphere. 



The affinity above alluded to likewise exists between the moss vegeta- 

 tion of Patagonia and Tierra del Fuego and that of the temperate dis- 

 tricts of the northern hemisphere, although the number of common species 

 in this case is not so large as in the other. The following Hatcherian 

 mosses belong also to the temperate zone north of the equator, namely : 

 Campylopus introflexus (Hedw.) Mitt., Rhacomitrium lanuginosum 

 (Hedw.) Brid., Bryum bimum Schreb., Leptobryum Pyriforme (Hedw.) 

 Sch., Webera cruda (L.) Schwaegr., Distichium capillaceum (L.) Br. 

 Eur., Aulacomnium palustre (L.) Schwaegr., and Orthotrichum rupestre 

 Schleich., the two last named being now for the first time reported as 

 natives of Patagonia. 



On the other hand, there are not a few species missing, which one 

 would a priori except to find in this collection. Many genera and even 

 families, having numerous representatives in the coast districts of Pata- 

 gonia and the more humid parts of Tierra del Fuego, are either wanting 

 altogether or at the most very scantily represented. The genus Andrecea, 

 for instance, which shows a large number of species within the former sec- 

 tions has none at all here, this likewise applying to Hypopterygium, Breutelia 

 and Ptychomnium; the family of Hookeriacece has not a single representa- 

 tive. Sparingly represented are the genera Ulota, Dicranum and Cam- 

 pylopus, which are elsewhere very rich in species. That so many species 

 characteristic of the region in question and commonly spread at least 

 within its more humid parts, should be wanting in the Hatcher collection, 

 might be explained by the fact of its having been brought together partly 

 at least from a comparatively dry section of the eastern slope of the Cor- 

 dillera. Thus it is that Hatcher's mosses scarcely even hint at a very 

 interesting feature of the West-Patagonian and Fuegian moss-vegetation, 



