53 



a well-developed pappus; both may be found in sterile and in fertile 

 localities, though they prefer especially Erec/ifA/res ~ the latter. 



5. Scaevola Koenigii Vahl (Sc. frutescens Krause). See p. 49, 

 No. 9. 



In Java this species is restricted to the beach where it is often 

 found in great numbers. If Treub has really found it in the interior 

 of Krakatao 1 ), we have to apply also to this species what I have 

 said on p. 50 about the occurrence of Wedelia. 



6. Gymnothrix elegans Biise (Pennisetum macrostachyum Brongn-). 

 See p. 48, No. 8. 



7. Phragmites Roxburghii Steud. 



At the present time named Phragmites Karka Roxb. This is a 

 meso-hygrophyte, which has not yet been found with certainty on 

 Krakatao. The plant found by Treub was probably Ne\raudia 

 madagascariensis Hook. ill. var. Zollingeri Hook. fil. (Phragmites Zol- 

 linger! Steud.) which much resembles Phragmites but may easily be 

 distinguished by its massive culms and villous glumes. As appears 

 from materials preserved in the Buitenzorg Herbarium Neyraudia was 

 found in September 1896 by Boerlage on one of the. other islands 

 of the Krakatao-group and named by him Phragmites Roxburghii. 

 Neyraudia is a grass occurring in sunny and usually rather sterile 

 localities, especially in stony places-). Consequently in 1886 and 

 yet much later the plant may have found on Krakatao many habitats 

 quite fit for it. Elsewhere on Krakatao this species seems not yet 

 to have been observed. The statement of Ernst 3 ) that in 1906 the 

 vegetation on the eastern slopes of the island was partly composed 

 of Phragmites Roxburghii must be due to some lapsus memoriae, 

 perhaps brought about by his having read the paper of P e n z i g 4 ) ; 



1 ) Sc him per [Indo-Malayische Strandflora (189!), p. 185) pointed already out 

 how uncommon the habitat given by F r e u b was - Koorders | Feysmannia IX 

 (1899), p 272 1 rightly mentions as a great exception that he found once Scaevo/a 

 frutescens in a single specimen upwards of 30 m. above sealevel on the almost bare 

 brick walls of a deserted fortress on the beach of Karang Bolong on Nusa Kambangan, 

 which for the greater part was overgrown by jungle. The numberless other specimens 

 of this species, observed by him in Java, Celebes and Sumatra, grew on the shore; 

 I also found the plant only on or quite near the beach and there often in great 

 numbers. 



-) The plant was found i.a- by Mr. A. E. Kerkhoven here and there on the very 

 stony lower slopes of Mount Guntur. This material which is preserved in the Buiten- 

 zorg Herbarium was determined by Boerlage, with some doubt, as Phragmites [Cf. 

 Teysmannia VIII (1X98), p. 506) 



") Neue Flora Vulkaninsel Krakatau (1007), p. 32. 



*) Penziq in Ann. |ard. Bot. Buiteniorq XVIII (1902), p. 99, 



