10* PREFACE. — 
carefully selected collections made in various parts of his district, 
during hasty professional visits; in one of which expeditions he 
discovered the GREYIA SUTHERLANDI,* one of the most remark- 
able of South-east African shrubs. 
To R. HALuack, Esq., Port Elizabeth, for interesting infor- 
mation on plants of the Natal Colony, accompanied by speci- _ 
mens obtained on hasty journeys when the traveller could not — 
burden his horse with paper or vasculums. These plants having : 
been collected and preserved under difficulties, deserve the more 3 
regard; and especially as most of them were new to us. Mr. 
Hallack is well acquainted with plants, and we look forward to 
his future visits to Natal with considerable expectation. 
To Mrs. HoLuanD, of Port Elizabeth, for well-executed out- 
line drawings, accompanied by dried specimens, of Orchidez and 
other plants of Uitenhage. Mrs. Holland has most kindly under- 
taken to furnish Dr. Harvey with sketches from the life of plants 
desirable to figure in “ Thesawrus Capensis.” 
To Dr. Roser, of Gnadendal, for an interesting series of well 
dried specimens from that rich botanical region. 
To Davip ARNOT, Esq. of Colesberg, for a box of living suc- 
culent plants (forwarded to Kew Gardens). 
To CHARLES WRIGHT, Esq. of the United States Japan Expe- 
dition, for upwards of five hundred species of plants collected 
whilst the vessels were detained in Simon’s Bay. Strange to say, 
this collection contains some species not received from other col- 
lectors. 
To ANDREW WYLEY, Esq., late Geological-Surveyor, for several 
parcels of specimens collected chiefly along the Orange River, 
from Colesberg to the mouth, and in Great Namaqualand. These 
parcels, received while the last sheet of this volume was passing 
through the press, contain several new plants ; and among other 
things of interest is a specimen (leaf and flowers) of the “ Lle- 
phant’s Trunk,” that most singular of Namaquan plants, and 
which proves to be a species of Adenium (A. Namaquanum 
Wyl.), a genus found also in Senegal and Arabia. 
* Now introduced to Britain from a few seeds sent by Dr. Sutherland in a letter . 
to Sir William Hooker, and successfully raised by Mr. Moore, of the Botanic — 
Gardens, Glasnevin, Dublin. 
