The rhizanthoid Cattleyas differ from the other species of Cattleya by having inflorescences which arise directly from the rhizome,(Refer 1st picture) instead of from the apex of the pseudobulb. (Refer 2nd picture).Its native habitat is Brazilian Central Plateau.
(1) Directly from the rhizome (2) The apex of the pseudo bulb
1) Cattleya walkeriana (Walker’s cattleya) is a species of orchid.
2) Cattleya nobilior
Referring to the flowers which are larger than those of C. walkeriana,