268 JACK'S LETTERS TO WALLICH, 1819-1821. 



PALMAE. 



Corypha sp. ? may perhaps be the Penang palm men- 

 tioned in his letters (p. 163 ). 



Oncosperma filamentosum, Blume, was described by 

 Jack under the name of Areca tigillaria from Sumatra and the 

 Malay islands in Malay. Misc. ii. Xo. 7, p. 88. 



Metroxylon Sagu, iiotth., the sago palm, interested 

 Jack, and the description which he gave had furnished the 



basis for most of those of subsequent authors. Jack first found 

 the sago palm in Penang (letters p. 166) and subsequently 

 examined it in detail at Beneoolen (letters pp. 190 and 193). 

 He records as localities for the tree " Siak and the Pagi 

 islands." -His description was prepared for the Malayan 

 Miscellanies, put into proof, hut only published by Sir William 

 Hooker in his Conpanion to the Botanical Magazine vol. i. 

 (1S35) p. 266. 



ARACEAE. 



Aglaonema marantifolium, Blume. was described in 



the Malay. Misc. i. \o. 1, p. 24, from Penang under the name 

 of Calla tiiiida. It is mentioned in Jack's letters (p. 174). 



homalonema artgustifolium, Hook. f.. was described by 



Jack from Penang in the Malay. Misc. i. Xo. 1, p. 24 under 

 the name of Calla angustifolia. It was mentioned in his 

 letters (p. 174). 



Homalonema humile, Hook, f., was described from 

 Penang in the Malay. Misc. i. Xo. 1, p. 22 under the name of 

 Calla humilis. Jack in his letters (p. 174) perhaps refers to it. 



Arum sp. Jack obtained in Penang an Aroid (letters 

 p. 174) which he refers to the genus Arum, not then split up as 

 now. 



Lasia acuieata, Lour., is almost certainly the plant of 

 Penang which Jack calls in his letters (p. 154) Pothos pinnali- 

 fida. 



Very imperfectly known. 



Coelipyrum coriaceum, Jack in Malay. Misc. ii. Xo 7, 

 p. 65, from Beneoolen. 



Ocetas spicata, Jack, in Malay. Misc. ii. Xo. 7, from 

 Tapanuli, Sumatra. 



-lour. Straits Branch 



