138 



possess floating power '), hence may be spread by water. 

 But it is probable that animals also take some part in 

 distributing the plant; if not, its occurrence in many places 

 of the interior far from water could not be explained. 



Labiatae. 



38- Hyptis brevipcs Petit. 



Hrect annual of American origin introduced into Java 

 already very long ago and at present spread all over the 

 island, but especially in its western and central parts, from 

 the plains up to an altitude of 900 m. It grows in fields, 

 on the narrow dikelets (galangan) between rice-fields and 

 along water-courses, locally often in great numbers. The 

 reproduction is effected by the small nutlets which possess 

 floating power. 



Zwarte Hoek. 



Kubiaceae. 



39. Uncarifi sp. 



Genus of scandent shrubs with small winged seeds. Several 

 species occur in Java. 



'iO. Nauclca sp. 



Genus of trees and shrubs with small winged seeds, of 

 which 5 species occur in Java. 



Young specimens (according to V a I e t o n). Possibly the 

 species found by Vale ton was Nauclea purpurascens Korth,, 

 which in 1908 and afterwards was found in the island. 



41. (juettarda speciosa L. 



hrect shrub or small tree, occurring throughout Java on 

 not-swampy beaches, especially on sand- and coral-coasts, 

 usually in scattered specimens. The reproduction is effected 

 by the rather large drupes which are hardly fleshy but possess 

 a thick light mesocarp -) and hence floating power. G u p p y 

 collected them in the drift-zone of the Keeling islands and 

 found that they can remain floating for months y ). 



') See G u p p y, Observations of a Naturalist in the Pacific between 1890 and 

 1899, II (1906), p. 500 seq . 



*) See also Engler und P r a n 1 1, Natiirl. Pflanzenfam., IV 4 , p. 97. fiq. C, D. 



3 ) G u ppy, Observations of a Naturalist in the Pacific between 1896 and 1899, 

 II (1906), p. 529. 



