THE ORCHID REVIEW. 331 



resembles." This would seem to extend the habitat to the Rio district. 

 This plant is also labelled C. amethystoglossa, but afterwards corrected in 

 pencil to C. porphyroglossa, evidently when the Xenia figure appeared, for 

 the reference is also written on the sheet. 



Messrs. F. Sander & Co. also introduced the species from the province 

 of Minas Geraes, and flowered it in August, 1891, and on the 8th of the 

 following month they exhibited it at a meeting of the R.H.S. as C. 

 granulosa var. Dijanceana (Gard. Chron., 1891, x, p. 310). Finally it 

 seems to have settled down to " C. Dijanceana, a supposed natural 

 hybrid." — See Orch. Rev., vii, 332. 



Thus the plant has a rather chequered history, and it is interesting to 

 clear the matter up. It is a good species, most allied to C. granulosa, but 

 with flowers only half as large ; the sepals and petals varying from 

 yellowish brown to greenish, rarely clear yellow (var. sulphurea), and the 

 narrowly unguiculate front lobe of the deeply divided lip bright rose-purple, 

 R. A. Rolfe. 



CULTURE OF ORCHIDS IN LEAF-MOULD. 



Odontoglossum grande is invariably seen to diminish under cultivation ; 

 opinions vary as to the cause, though I think it is often from fear of dis- 

 turbing them for repotting. The species being a favourite here, and many 

 of them failing yearly to flower, I potted most of them in leaf-mould, the 

 result being that they have flowered well, besides finishing off good bulbs ; 

 whilst those that were potted in the old way have not flowered, and also 

 those that were not repotted. 



Having a lot of weak unsatisfactory Laelia purpurata, I had them potted 

 in leaf-mould this year, and they have made strong bulbs, with lovely 

 flower sheaths, whereas my strong big plants are behindhand, still making 

 their bulbs. Who does not know that after shaking out L. purpurata 

 plants, and repotting them, they often lose a year's crop of flower? But 

 those potted as above are all showing for flower. 



Dendrobiums under trial in leaf-mould are a grand success. D. nobile 

 has made bulbs just twice the length of the old bulbs, and D. Phalamopsis, 

 potted in the same way, has made bulbs twice as long as the old ones, and 

 flowered wonderfully well. One six-inch pot, in which was placed four 

 bulbs taken from the top of some old bulbs, has now eleven bulbs and 

 thirteen flower spikes, and this after six months culture in leaf-mould. 

 Formerly I never gave this Dendrobe any room in pots, and I see that 

 plants potted in the usual way have made new bulbs of the same length as 

 the old ones. 



The best results here this year from the use of leaf-mould are the plants 



