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became common Trianzi flowers. Lately the same Trianzi lacera, I believe from a Sanderian introduction, re-appeared 
with Herr Hofmarschall a. D., Baron St. Paul d'Illaire, at Fischbach, in Silesia, and I predict it will one day bea 
humble Trianzei. 
The probably wide area of mule stocks renders it impossible to make anything like a diagnosis from such scanty 
materials as often are at hand, and if one saw the whole stock at once the difficulty would be proportionately increased. 
H. G. Rehb. f. 
Hybrid Lady’s-slipper Orchids are by no means such rarities now as they were a few years ago. The facility with 
which the majority of the species intercross, and the comparatively short time that elapses from the seedling to the 
flowering stage, have led to the production of a long list of hybrids which, in fact, outnumber the introduced species. 
Ever since Mr. Dominy raised the first hybrid Cypripedium (C. Harrisianum) at Exeter, about twenty years ago, other 
hybrids have appeared in quick succession ; until now there are no fewer than half-a-hundred. 
Many of these garden hybrids are handsome plants, some, indeed, are extremely beautiful ; while, on the other 
hand, the intercrossing of some species has produced progeny in no way superior to the parents, and others are worthless 
as garden plants. The indiscriminate intercrossing of species may occasionally produce good results, but, in the case of 
Cypripedia, the finest hybrids are those which have sprung from parents possessing some good points which it has been 
the aim of the hybridist to blend in one plant. Hybrids have been produced most numerously among the Selenepedia 
section of South America, and the marble-leaved species of the eastern tropics, but the hybridist has failed to intercross 
any of the long-sepalled species, as for example C. Stonei and also the North American species, such as C. spectabile, 
with the South American species. He has moreover been baffled in his attempts to intercross the species of the western 
tropics with those of the eastern, though in this he may yet be successful. 
The culture of this, like that of most other tropical Cypripedia, is simple. Being of vigorous nature it requires a 
substantial compost to grow in. To the usual mixture of peat and sphagnum moss there should be added about a third 
part of good fibrous loam, upon which the strong roots like to feed. Like others of a similar nature, it delights in 
an abundance of water during active growth, in fact it may be deluged during the spring and summer months. _ It is, 
however, essential that the drainage is efficient, for, though the plant likes water, stagnant moisture in the soil or about 
the neck of the plant is inimical to its well being. The plant should be potted moderately high, and be surfaced with live 
sphagnum moss. It should have a light position in the East Indian house, the winter temperature of which should 
range from 58 deg. to 65 deg., and a summer heat of from 65 deg. to 80 deg., with sun heat. 
Plate drawn from a plant in the possession of Norman C. Cookson, Esq., Oakwood, Wylam-on-Tyne. 
