Bletia verecunda × Calopogon pulchellus; one or two plants.
Schomburgkia tibicinis × Laelia purpurata; one plant.
The discovery that fertile unions may be concerted between species, and even genera, differing in all visible respects, gives profound interest to the study of hybridisation in the scientific point of view. We have gone so far already that classifications which appeared to be unquestionable have been rudely upset. That Laelias and Cattleyas should combine is not surprising, even though one come from North Mexico and the other from South Brazil. But what shall we say when Epidendrums combine with both?—with Sophronitis, Zygopetalum!—nay, with Oncidium!!—with Dendrobium!!! Sobralia proves fertile with Cattleya; so does Sophronitis. Spathoglottis has been crossed with Bletia and with Phajus. Zygopetalum with Colax, with Oncidium, with Epidendrum, with Odontoglossum. Schomburgkia with Laelia and Bletia. Combinations even more astonishing are reported, but for those named there is responsible authority.
I cannot go into detail; these remarks are designed only to call attention to the subject. Not all the bigeneric hybrids mentioned have flowered; and at the present time we have learned enough to be aware that possibly one parent will be ignored by the offspring—that a seedling of Epidendrum crossed with Dendrobium, for example, will bloom a pure Epidendrum or a pure Dendrobium of the species used; which in itself is sufficiently strange. But seedlings have actually been produced in every case which I have named. It is one of the fixed rules in biology that the offspring of different species must be barren—otherwise the parents are not truly species—and that different genera will not breed at all. But in most instances which have been brought to the test as yet, hybrid orchids of different species prove fertile, and some bigeneric crosses yield a progeny at least. What follows? Evidently that the genera or the species are not really distinct—in the cases given. Must we admit, then, that a Dendrobium of the Himalayas (crystallinum) does not differ generically from an Epidendrum of Mexico (radicans)?
This is not the place to argue it out; nor, in truth, would there be much profit in arguing the question while the number of facts to be adduced is still so small that error is not improbable. I hope I have made it clear that the hybridisation of orchids is the most fascinating of botanic studies at this time; which is all I have in view.
But professional ‘growers’ are not likely to help the cause of science much—no blame to them either. They cannot afford to make experiments which demand a great deal of time, and increasing attention, for years, from the most highly-paid of their staff—too probably remaining a dead loss after no small portion of a lifetime has been spent in bringing the produce to flower. A man of business must make such crosses as are most likely to pay in the shortest time—easy species, big, highly coloured. Under the best conditions he must wait three to six years, perhaps ten, or even more. Evidently the most valuable hybridisations in a scientific point of view would be those least likely to succeed; all would be doubtful, all would require a long term of years, and most would not ‘sell’ in the end probably. Such work is for amateurs.
I can mention only a few of the Cypripediums here which seem most notable, and it will always remain dubious whether I have chosen the best examples.
Bellatulum eximium.—The dorsal is small, low and spreading, white, with carmine specks along the edges, large red-chocolate spots inside. Petals closely depressed, mottled with carmine here and there at the edges, and spotted like the dorsal. Lip insignificant—white with a few small dots.
Olivia (tonsum × concolor).—Dorsal white above, changing to pink; base greenish, slenderly feathered with carmine. Petals bowed, flushed with pink, pink lined, dotted with carmine. Slipper pink, deepening to carmine along the front, fading at the toe.
M. Finet (callosum superbum × Godefroyae).—White with a faint rosy blush. At the base of the dorsal is a greenish tinge, which reappears somewhat stronger on the petals. There are a few specks of crimson on the latter, and a few crimson markings at the top of the slipper.