96 THE ORCHID REVIEW [ApRiL, 1916. 
DENDROBIUM PIERARDII AND D. PRIMULINUM. e| 
‘WGN interesting Dendrobium has flowered in the collection of Captain W. 
Horridge, Bolholt House, Bury. Captain Horridge writes: ‘‘ I send 
‘you portions of two pseudobulbs cut from a clump of Dendrobium 
primulinum imported two years ago. One is the ordinary variety. The 
-other appears to be either a particularly stout variety of D. Pierardii or a 
natural hybrid between this and D. primulinum. In flowering habit it is 
entirely similar to D. Pierardii ; the buds, which with their pedicels are deep 
chocolate. purple, are pushed singly orin pairs direct from the nodes (not 
-developing within membranous sheaths as in D. primulinum), and the 
stems attaining almost full. height before the buds begin to swell 
appreciably. . The growth from which this has been cut measured 33 inches 
and bore 22 flowers. The clump came out of an importation by Messrs. 
Sander & Sons, who give the habitat as Burma, in or near the D. 
Wardianum district.” | 
This is particularly: interesting, and recalls a Dendrobium which 
flowered with Messrs. Cypher, Cheltenham, in March, 1899. This was. 
imported with D.. Pierardii, and was taken for that until it flowered, when 
the resemblance to [, primulinum was apparent, and it was sent as 
probably a natural hybrid between the two species, a piece of the stem of 
D. primulinum being enclosed for comparison. The intermediate character 
is clear, and the inference follows that somewhere the two species grow 
intermixed. . 
D. PieRARDII is a very common and widely diffused species, extending 
from Nepal, along the lower slopes of the Himalayas, the Khasia Hills, 
Assam, Burma, and.as far east as the Chengmai district in Siam, where it 
was collected in deciduous jungle by Dr. Kerr. It varies greatly according 
to locality, and Major-Gen. Berkeley states that the varieties growing in 
the hill ranges are the best; also that it is sometimes found in company 
with D. Parishii, with which it hybridises. 
D. PRIMULINUM is nearly allied to D. Pierardii, differing in its shorter, 
stouter stems, nearly equal sepals and petals, and the broader, less 
expanded lip. It is found in Nepal, Assam, and Burma, while Dr. Kerr 
has somewhat recently collected it in evergreen jungie in the Chengmal 
district in Siam. In this case also Berkeley states that the effect of locality 
and climate are very marked, and that D. primulinum giganteum 1s the 
mountain form. He does not mention finding the two species together, 
though it is now evident that somewhere the areas overlap. Some of out 
Indian correspondents may have some evidence on this point. R.A.K- 
