136 



27. Euphorbia atoto Forst. See pp. 90 and 93, No. 10. 



On the eastern side. 



Vitaceae. 



28. Columella trifolia Men: ( = Vitis trifolia L). 



Shrub, high climbing with the aid of tendrils, spread 

 throughout Java from the plains up to an altitude of 

 600 m. It grows in hedges, thickets and not too dark 

 forests, often in large numbers and occurs in two forms, a 

 glabrous one (Cayraf/a carnosa Gagnep., Cissus carnosa 

 Lamk.), which seems to grow only near the sea, and a 

 pubescent form (Cissus cinerea Lamk.) which grows from near 

 the sea to far in the interior. It is unknown whether in this 

 case there exists a correlation between edaphic factors 

 and the presence or absence of pubescence. The reprod- 

 uction is effected, besides by shoots sprouting from far- 

 creeping horizontal roots (which in Java make the plant a 

 troublesome weed in sugar-cane fields), by the shining black 

 berries which as they cause a troublesome irritation of 

 the throat cannot be eaten by man. Whether they are 

 sought after by animals is unknown to me, but one often 

 sees plants loaded with hundreds of ripe berries from which 

 fact one would be inclined to deduce that, generally spoken, 

 the berries are not much relished. The berries possess float- 

 ing power, the small hard seeds not. 



Zwarte Hoek (the glabrous form). 



29. Z.ee<? fjei/uata I.. 



Erect shrub, spread throughout Java from the plains up to 

 800 m. above sea-level, exceptionally even higher. It grows 

 in thickets, in young secondary forests and in teak-forests. The 

 reproduction is effected by the berries. Plants damaged by 

 fire easily emit new shoots from the crown of the root 1 ). 



On the eastern side. 



Malvaceae. 



30. Hibiscus ti/iaceus L. See p. 93, No. 11. 



Zwarte Hoek. 



*) ]. O. B. B e u m e e, Floristlscli-analytische onderzoekingen van de korte flora 

 in kunstmatig aanqeleyde djati-plantsoenen op lava, in verband met de ontwikkelinq 

 van den djati-opstand (1922), p. 90. 



