I allude of course to those remarkable works of Dr. Lindley, the Orchidearum Genera et Species and the Folia Orchidacea (the latter of which he was not destined to complete), with which the science of Orchidology may be said to have arisen, and which will continue its text-books for all time to come.
It may be well, once for all, to state that in the case of species that have not been long imported, and which have therefore not had time to acquire their full strength, the number and arrangement of flowers in the figures is taken from native specimens where such are available. It sometimes happens that the "wild" standard is never reached in cultivation, but it is more frequently exceeded.
A Monograph of Odontoglossum · The Wunder Library — complete classics, free to read, with narration.