PREFACE. 
more especially to the ever extraordinary botany of 
Africa. 
'These additions to the too extensive Genus Me- 
sembryanthemum are not to be wondered at, how- 
ever difficult they may render the construction of 
names that may be unoccupied as well as unex- 
ceptionable. But the day is not now very distant 
when this overloaded family will be broken down 
into smaller generical groups, and upon princi- 
ples that will be both sound and satisfactory. 'The 
Section Minima from their tubular corolla or top- 
shaped forms, and the Lingueformia from their 
uniformly tongue-shaped leaves, not now to men- 
tion others, will lead to applicable names. 
The species of Mesembryanthemum Pao 
home: alive by the author's respected friend Mr. 
Burchell, that gentleman has most kindly permit- - 
ted to bé here described, as will appear by consult- 
ing the pages below; and he possesses various 
others in a dried state which did not survive their 
journey,-but which will doubtless appear in the 
course of his much wished € 
Of this enormous Genus there- are 
to the author alive or in books, aheve two "etim 
and fifty species ! 
- From all the foregoing sources united arises the 
present Supplement, eudeavouring. to. collect to- 
gether technical descriptionsof the new species, as 
