x PREFACE. 
Lambert, Esq. I am particularly indebted for the 
liberty of examining his fine collection, contain- 
ing, among other rarities, all that remains of 
Pailas’s Roses, specimens from Colonel Hard- 
wicke of the Attar tree of Ghizapore; fruit of 
R. multiflora, and flowers of R. hystrix, all which 
are in no other herbarium in this country. The 
materials which have resulted from the experience 
of twenty years’ perpetual observation of the most 
extensive collection of cultivated Roses in the 
world, have been submitted tc my examination 
by Mr. Sabine their liberal proprietor. To Mr. 
Lyell, whose knowledge of the subject is only 
equalled by the readiness with which it is com- 
municated, I am under the most extensive obliga- 
tions. Nor must I omit to acknowledge the ma- 
terial assistance I have received from my friend 
Mr. Hooker, now Regius Professor of Botany in 
the university of Glasgow, whose Roses collected 
with the greatest care in Ireland, Switzerland and 
the South of France, with those of his numerous 
correspondents, have been placed in my hands. 
By them many doubtful synonyms of continental 
botanists have been ascertained. By the learned 
President of the Linnean society I have been al- 
lowed to examine the important herbarium of 
Linneus, and his own, which is not less valu- 
able. A multitude of other communications, too 
numerous to be acknowledged individually, are 
noticed in their proper places. 
