24 
The genera most largely represented are the following :— 
Odontoglossum as .. about 350 entries. 
Cypripedium i m B 99 gee 
Cattleya ae 2 uo NI 
Dendrobium s FA Rages «| o» 
i s n in Ei ae Fh 
Masdevallia ... ju in s EO y 
neidium  ... cO . 4 
Croton, Iris ... in 100: each; 
With r egard to Odontoglossum a grodt number of forms and 
even of species previously undescribed have been introduced 
fact, about doubled during the period covered by the list. None 
of the forms enumerated in the list has originated in cultivation. 
The art of the gardener has added to botanical science the 
aas of a considerable number of bigeneric hybrids, i.e., of 
osses between species rate to distinct and even not very 
closely allied genera. I at one time supposed that such 
crosses Miis either imposible, or, if possible, were a proof that 
the genera were not really distinct. Darwin had long, however, 
clearly bow that the limitations and Sobie. of cross- 
fertilisation do not run inquid wi et unie affinities, t e., with 
e place occupied the par natural classification. It 
by 
may be grey io; "x the Nlewing list of bigeneric hybrids 
ineluded in the lis 
Aloe x Gasteri 
Aphelandra x Biensiudsiinn: 
Bertolonia x Sonerila. 
Epilelia = Epidendrum x Le 
Bra ag a = Vii bogus qe x ger 
Gloxinia x Tapeinotes. 
ee = Lelia x Cattleya. 
Phaio-calanthe = Phaius x Calanthe. 
Sophro-cattleya = Sophronitis x Cattleya. 
Sophro-lelia = Pophronitis x Lelia, 
Spiræa x Astilbe. 
Urceocharis = Urceolina x Euchari 
Zygocolax — Zygopetalum x braste. 
An even more remarkable Pu or presented by the 
at present unique case of a trigeneric hybrid :—Sophro-catlleya 
Veitchii, a garden hee between Dale onlin ya elegans and 
Sophronitis yrandiflora 
The number of names enumerated under Croton largely repre- 
sents mere forms cultivated for ihe beauty of their foliage of 
I aun formerly known as Croton pictus. In 
point of fact the two genera are widely distinct, and — 
NE two Lo prae of — 
