DISTRIBUTION 
35 
mas (by D. elongata :), Ophioglossum vulgatum (by O. capense ) 
and Ceterach officinarum (by C. cor datum). Lycopodium clava- 
tum is also British. 
The most widely distributed species, known to occur in 
Europe, Asia, Africa, Australasia and America are : Dryopteris 
thelypteris , Polystichum aculeatum , A splenium trichomanes , 
Adiantum capillus- veneris, Pteris longifolia, Pteridium aquili- 
num and Lycopodium clavatum. 
It is interesting to note the rapid increase of knowledge 
concerning the distribution of species in South Africa made 
since our first edition was published 22 years ago, especially 
in regard to the newer provinces, as shown below : 
Total 
West 
East 
Kaff. 
Natal 
Orange 
Free 
State 
Trans- 
vaal 
Rho- 
desia 
P.E.A. 
1892. First edition 
Ferns of South 
179 
85 
85 
97 
146 
3 
70 
24 
Africa 
1905. Recent Infor- 
mation concerning 
212 
95 
86 
108 
147 
19 
90 
86 
20 
S. A. Ferns 
1914. Present edition 
Ferns of South 
220 
96 
90 
109 
151 
3 i 
113 
126 
45 
Africa 
The distribution of each species, and the species of each 
area, so far as now known, are shown in the following 
table : 
Species confined in South Africa to the respective areas or 
groups of areas indicated , so far as now known. 
