PREFACE V. 



where, or call attention to points requiring elucidation. They might easily 

 have been extended, but for the fear that the work might outgrow the limits 

 assigned. 



Addenda.^ — -The Addenda has outgrown its intended limits, because the 

 work has taken so much longer to complete than was anticipated. Roughly 

 speaking, it may be said to contain three years additions, up to the end of 

 1907. As the plan is uniform throughout, it is only necessary to add that 

 the numbers indicate the position in the body of the work. Numbers 

 followed by letters, a, b, c. &c., indicate actual additions, but the remainder 

 indicate additional information respecting names previously enumerated. 

 It is intended to give later and future additions in the Orchid Review, so as 

 to prevent the work from falling out of date. Particulars of this appear on 

 page 326, after the Index. 



Index. — As the adopted names of the hybrids, as well as those of their 

 parents, follow a strict alphabetical sequence, it has been thought necessary 

 to give only an Index of Synonyms. The Addenda, however, of both 

 Parts I. and 11. should not be overlooked by those who consult the work. 

 Finally appears a List of Illustrations, 120 in number. 



Omissions. — A few remarks under this head appear necessary. The 

 absence of many hybrids of unknown or doubtful parentage has already been 

 explained as unavoidable, but the omission of many well-known natural 

 hybrids, as Odontoglossum X Andersonianum and Laeliocattleya X 

 elegans, may occasion surprise, especially as they appear in the list of 

 parents. But a careful examination of the programme will show that, 

 strictly speaking, natural hybrids do not come within the limits of the work, 

 and can only be included when they have been raised artificially. They 

 are more numerous than is generally realised, and their inclusion would 

 have greatly extended the bulk and difficulty of the work. Many are also 

 not in cultivation. It was necessary to draw the line somewhere, and it 

 may yet be possible to deal with them elsewhere. The inclusion of the multi- 

 tudinous named varieties was impossible, and a selection would have been 

 both difficult and unsatisfactory, but we have been able to indicate those 

 that have been figured, by the inclusion of the varietal name within brackets 

 after the figure cited. The only other matter which occurs to us is the 

 omission of Awards. They had been included, but it was found that there 

 was such an utter want of uniformity between the systems of the different 

 Societies, and the value of their awards at different periods, that the record 

 was not worth the space required, and they were again cancelled. The 

 records of the different Societies must be consulted for them. 



Secondary and more Complex Hybrids. — A great deal of difficulty 

 has been experienced in dealing with secondary hybrids and those of more 

 complex parentage. Although we have treated them the same as primary 



