39^ >-'^- i'.m(ii'ii> r A. 



and iini>t contintic to do so. parth' throug'h the diffit-'ulty of 

 getting at the original types, parti) through the small number 

 of fbryologists who know South iVfrican species and also exotic 

 species sufficiently well to determine the limitations of each 

 species. Meantime additional ^peciics are beiiig discovered, 

 some new. others already known elsewhere. 



The greatest difficulties in regard to distinctively South 

 African species are that hundreds of them have been named and 

 distributed without dcscripti(Mis 'ha\ ing been ]:»ublished ; that 

 many have been named in ijrixate herbaria or in letters withotu 

 haxiny been either ]Hiblished or distributed; and that in his later 

 years C". Aluller described as new many which were identical with 

 earlier ])ublished species. These difficulties 1 am trying to re- 

 move in ni) " flanclbook of the Bryophyla o^ South Africa." now 

 in c<Hirse of ]>roduction. Of the 171 i/ciicra oi mosses therein 

 described, iiito wbich are distributed the 875 mosses enumerated 

 in my Check List {1915) as having been (rightly or wrongly) 

 credited to South Africa, and included meantime as a basis for 

 further stud\. nine (/ciicra are regarded as doubtfully South 

 African, viz. :— 



Poh'trichadclpliHs. I'almicUa. 



Bracliydoiifiiiiii. Lcpiostouunii, 



Dniminoiuiia. Cyatlioplionim, 



SplacliiiKiit. Acrocladiinn. 

 Aniblyodoii. 



jh (fcucra lia\e no known .^ouii: African endemic sjiecies, 

 \z. : — - 



Andrcica. Mniohryiitii, 



Distichiitin, Anfitrichia, 



Rhahdo7i'cisia, tlomaJothccuiin . 



Schisf(>)iiifriinii, Pleura pus. 



Octoblcphannu. Anomudon. 



Alo'ma^ Herpctincuroii. 



Gyrowcisia, florih itiida via . 



Encalypta. TrachyphyUnm , 



while the remaining [46 genera have !^pecies claimed to be en- 

 demic to South Africa, many of these f/cnera being represented 

 in .'^outh Alrica only by such endemic species, while others have 

 also species known from elsewhere. 



Ainony: the larger (/encra which each have manv endemic 

 species are : — 



SphagintiiK Uyincuostominii Bracli\in,ii'nnfi, 



i ampylopits. Svrrhopodon. Wcbcra. 



Jhssidnis. Ortliotnchuur. Br\iim, 



(.rimmw, Macromitrinut Fabroiiia. 



fortula. Schlothcimia. RhxnchostiUjinni, 



Barbiila, Rntosthodon. RhvnchositeqieUai 



J ortclla. Baiirainia. Phiqiothccium, 



rrichosloinitiii. Clyplwcarpns Rliaphidoxfrf/i'iim. 



Philonotis. 



