146 DENDROBIUM AGGREGATUM. 
being very similar to those of D. densiflorurn, and somewhat larger. It is worthy 
of remark, that the flower-scapes emanate from the sides of the pseudo-bulbs, at 
the point where the circular sections exist. Many of the caulescent species are 
known to protrude their flowers in a similar manner from that part of the old 
stems whence the lea,ves have fallen, so that the two divisions are not far removed 
from each other in character. 
British collections are mainly indebted for this, as well as innumerable other 
orchidacese and Indian plants, to Dr. Wallicli, by whom it was found on the 
banks of the Chappadong river, near the Gulf of Martaban. Mr. Pierard also 
discovered it on the northern border of Arracan, where it inhabited exclusively the 
trunk of Lagerstrcemia Begince. Specimens were brought by Mr. Gibson from the 
Calcutta botanic garden, but it was not met with in any of the districts which he 
traversed. From one of the plants thus obtained, which bloomed at Chatsworth 
in the spring of 1838, the accompanying figure was prepared. 
The epiphytal character of all Dendrohia suggests the propriety of attaching them 
to short pieces of wood ; nevertheless many of the larger species attain a higher 
standard of excellence, both as regards luxuriance and beauty, when cultivated in 
a well-drained and loosely-placed compost of heath-soil, potsherds, and sphagnum. 
Our present plant, on account of its pseudo-bulbous habit and consequent proximity 
to the soil, which is apt to become too moist at certain seasons, sliould be grown on 
a block of wood, merely securing it thereto, and enveloping its principal roots in 
moss or lumps of very fibrous heath-soil. 
Its specific designation serves more to distinguish it nominally than to express 
its particular characteristics, the term being so nearly synonymous with densiflorum, 
(the name of another species,) that the only difi*erence is the still closer aggregation 
of the flowers on the racemes of the last-named plant. 
