[Crown Copyright Reserved. 
ROYAL BOTANIC GARDENS, KEW. 
BULLETIN 
OF 
MISCELLANEOUS INFORMATION, 
No. 6] [1923 
XIX.—REHMANN’S SOUTH AFRICAN MOSSES. 
H. N. Drxon anp A. Gapp. 
Rehmann’s Musci austro-africani were issued in two sets, the 
first between 1875 and 1877, comprising Nos. 1-423 (or ? 424); 
the second in or before 1886, containing Nos. 424 (or ? 425) to 
680, which appears to conclude the series. 
No list of these exsiccata appears to have been published ; and 
it is doubtful whether a complete set is to be found in any collec- 
tion. It appears desirable to have such a list for reference, and 
the following is an attempt to furnish it, so far as is possible from 
available material. It is based very largely on a MS. list drawn 
up by Di. T. R. Sim from the sets of Rehmann’s mosses in South 
African herbaria. Three sets are known to exist there, none of 
them at all complete, and none of them to any great extent 
duplicating the others; so that it would seem, as Dr. Sim suggests, 
as if one fairly full set had been divided between the herbaria 
in question. 
How many seta numbers were issued it is difficult to com- 
pute; under many of the numbers two or more specimens were 
issued, as 665, 6658, 665c, &c., the supplementary numbers 
usually representing duplicates, or in many cases varieties, of 
the species in question. Dr. Sim was able to furnish copies of 
615 labels, including supplementary numbers, which he computed 
to represent about 500 out of the full 680 or so primary ones. 
A careful search through the British Museum collection, and of 
at least the most important genera at Kew has resulted in the 
ing up of a considerable number of the missing labels, and it 
will be found that in the following list approximately 50 only are 
missing, though it is possible that a very small percentage must 
be added of supplementary numbers that may have been issued, 
as to which there is no clue. 
There is, however, a strong probability that some of the 
missing numbers were never issued. Nos. 1-6, for instance, 
occur in none of the collections searched; the same is the case 
with Nos. 77-81. Rehmann may have left these gaps to be tee 
= (78)19999 Wt396—P 32 1000 6/23 
