Arboreous j leaves alternate, elliptical, bright shin- 

 ing green above, silvery beneath from numerous 

 adpressed scales (like Elseaginus); flowers congested 

 in compact clusters on the naked branches, short 

 pedicelled ; pedicels jointed at the base. Involucrum 

 and calyx thickly clothed with adpressed brownish 

 scales. Fruit about the size of a large orange, 

 beset on all sides with hard prickles. Testa of the 

 seed pale chesnut colour, soft and easily sectile, coty- 

 ledons unequal sized, one considerably larger than 

 the other, radicle next the hilum. 



I dedicate this genus to Major General CuUen, 

 Resident at the Court of the Rajah of Travancore, 

 who has long devoted his leisure to philosophical 

 pursuits, among which economical Botany has enjoy- 

 ed a large share of his attention, but is specially 

 intended to commemorate the light which his meteo- 

 rological researches have thrown on the relationship 

 existing between climate and vegetation. He has 

 established meteorological observations in 10 or 12 

 distinct stations throughout the provinces of Tra- 

 vancore and Cochin. 



1761-62. CuLLENiA EXCELSA (R. W. Durio Cey- 

 lanica^ Gardner). 



lyamally Hills, in dense forest* Also Malabar and 



Ceylon, flowering February and March, ripening its 



fruit October and November. 



A large tree, some of those examined were esti- 

 mated at about 100 feet in height with a circum- 

 ference at the base of about 15 feet. Bark inclin- 

 ing to smooth, brownish. Branches spreading and 



Leaves elliptic, oblong, with a short blunt acumen, 

 bright pea-green above, silvery from numerous ad- 

 pressed scales below. Flowers very numerous, al- 

 most covering the two or three years old branches. 

 Fruit brown, capsule hard and woody but soon 

 spliting when exposed to the sun or a dry atmos- 

 phere along one of the valves and exposing the 

 chesnut-like seed. 



r 



The late Mr. Gardner found it on wooded hills 

 near Galle and has published a full and excellent 

 description of the tree in the 8th volume of ^e 

 Calcutta Journal under the name of Durio Ceylan- 

 icus a mistake scarcely to be expected from so 

 acute an observer and excellent Botanist. In his 

 description of the anthers he has fallen into a grave 

 error in supposing each capitula of anthers a single 

 one and each anther a single pedicellate grain of 

 pollen. When my drawing was made I had not 

 good enough flowers to enable me to exhibit this 

 error but I have since got them in a suitable state 

 and have ascertained that they are as described in 

 the generic character. The wood of this tree is 

 beautifully white, but soft and apparently of little 

 value. 



Fig. 1. a fructiferous branch much reduced in size, 

 the original was upwards of 3 feet long, 2. clusters 

 of flowers, natural size — 3. a fruit natural size — 4. 



17, 18, 19, 20, are different 



No. 6. shows an 



leaves, natural size- 

 views of the seed, all natural size. 

 expanded flower with the place occupied by the in- 

 volucre marked by a slight line. Figures 6 to 10 

 were taken from old flowers found on a fructiferous 



umbrageous, often drooping towards the extremities, branch. 



ERRATA. 



911. For Cymbid. triste (WUld.). 



1689. 



927. 



1634. 



1635. 



1669. 

 1727. 

 1745. 



tenuifoiium (Willd.). 



- Habenaria montana (Riclid.). 



- Eria polystachya (Richd.). 



pubescens (R. W.). 



Monochilus. 



W 



dum guttatum 



read tenuifoiium (Willd.). 

 triste (Wind.). 



decipiens (R. W.). 

 pubescens (R. W.). 

 polystachya (Richd.). 

 prides Wightianum (Lind.). 

 Cheirostylis 



Rheedu (R. W.), 



In addition to these more important errors the names on several of the plates are incorrectly written, but can be 

 corrected by a reference to the letter press. These latter errors originate with the Lithographer, who copies the names, 

 and the impossibility, at this distance (300 mUes), of my revising what he writes. 



C 23 ) 



