249 



of the locality where a species was collected, whilst the Dutch text 

 gives information on that point; in such cases I have supplied the 

 missing data from the Dutch text. It also occurs that the Dutch and 

 English text flatly contradict each other. See f.i. No- 3, Dryopteris 

 megaphylla C. Chr., which according to the Dutch text occurred up 

 to an altitude of 400 m., but for which the English text gives an 

 altitude of 60 m. See also No. 38, Li pan's viridiflora Lindl. for 

 which species the Dutch text gives a height of 700 m. (about 

 2300 feet), the English text 208 feet or somewhat more than 60 m. 

 These discrepancies cannot be explained by an error of the press. 

 Analogous but less strongly marked cases are presented by No. 62, 

 Radermachera glandulosa Miq., for which the Dutch text gives: between 

 30 and 500 m. above sealevel, the English text: between 150 and 

 1500 feet, (i.e. between 45 and 450 m.) and Homalanthus populnea O.K. 

 which according to Appendix III occurred between 30 and 200 m. 

 above sea-level, whilst from a subsequent paper (See No. 57 hereafter) 

 it appears that in April 1919 this species was also collected at an 

 altitude of 300 m. Such incongruities clearly show how negligently 

 the paper was composed. 



Herebeneath I give firstly the list of ,,forest-plants", secondly 

 some further remarks on it. 



FOREST-PLANTS FOUND BY MR. DOCTERS VAN LEEUWEN 



ON KRAKATAO. 



Hymenophyllaceae. 



/ (42) 1). Trichomanes humi/e Forst. 



Minute fern, found throughout Java between 150 and 800 m. 

 above sea-level in constantly moist and well-shaded localities, 

 mostly on wet rocks and steep earth-wails, but also as an 

 epiphyte on the lower parts of tree-trunks. 



Collected, as an epiphyte, at an altitude of 600 m. 



Cyatheaceae. 



2 (43). Alsophila spec. 



Several species of this hopelessly intricate genus of tree- 

 ferns occur in the moister regions of Java from the lowlands 

 up to high in the mountains. They grow in constantly humid 

 localities, especially in primary and secondary rain-forests 

 and on watersides, often gregariously in ravines but also in 



! ) The number within brackets is that given in Appendix 111. 



