JACK'S LETTEES TO WALLICH, 1819-1821. 245 



Sterculia rubiginosa, Vent v is recorded by Jack as 

 having been found in Penang, but under the wrong name of 

 8. angustifolia, Eoxb. (Malay. Misc. i. Xo. 1, p. 21). It is 

 not a common tree in Penang; and Curtis' only locality is 

 Penara Bukit. 



Pterospermum Jackianum, Wall., is founded on speci- 

 mens collected bv Jack in Penang (Wall. Cat. Xo. 1164). 

 TILIACEAE. 



Grewia paniculata, Eoxb., was found by Jack in Penang, 

 who adhering to Smith's name of Microcos tomentosa des- 

 cribed it under this in Malay. Misc. i. Xo. 1, p. 13. He refers 

 to the plant in his letters (p. 189). 



Grewia Microcos, Linn., was obtained by Jack from 

 Car Xicobar, and briefly diagnosed as a new species under 

 the name of Microcos glabra in Malay. Misc. i. Xo. 1, p. 14. 



Elaeocarpus nitidus, Jack, which occurs in the Water- 

 fall valley, Penang, was found and described by Jack (Malay. 

 Misc. i. Xo. 5, p. 41). Under one of his early letters he sent 

 specimens of an Elaeocarp to Wallich (p. 165) but it is im- 

 possible to say which. 



Elaeocarpus Jackianus, Wall., is a not-uncommon 

 Singapore plant, of which Jack sent specimens to Wallich 

 (Wall. Cat. Xo. 2679), and which Jack described as Monocera 

 ferruginea (Malay. Misc. i. Xo. 5, p. 44). 



Elaeocarpus petiolatus, Wall., is described by Jack 

 from Penang as Monocera petiolata in the Malav. Misc. i. Xo. 



5, p. 43. 



LINACEAE. 



Ixonanthes icosandra, Jack, was found in the interior 

 of Sumatra behind Bencoolen, and described in the Malay. 

 Misc. ii. Xo. 7, p. 53. Writing of it in 1872, Sir Joseph 

 Hooker pointed out that there are differences between Jack's 

 description and the tree as we know it in Malaya (Flora of 

 British India i. p. 416). It is therefore desirable that some- 

 one should search in the region from which Jack got his plant 

 for something which would explain the divergence. 



Ixonanthes reticulata, Jack, was found at Tapanuli, 

 Sumatra, and described in Malay. Misc. ii. Xo. 7, p. 51. 



GERANIACEAE. 



Impatiens sp. An Impatiens was found by Jack on his 

 journey to Gunong Bengkok, behind Bencoolen, (letters p. 

 234). 



RUTACEAE. 



Glycosmis pentaphylla, Correa, var. macrophylla, was 



found by Jack in Penang and described under the name of 

 Chionotria rigida in the Malay. Misc. ii. Xo. 7, p. 54. 



R. A. Soc.; No. 73, 1916. _ . 



