( 417 ) 



in any publication about this geographically interesting discovery. 

 My surmise is founded on a specimen labelled by Junghuhn himself 

 as follows: Casuarina equisetifolia, E monte Law» ubi sponte crescit" '. 

 This specimen must indeed be regarded as (\ equisetifolia Fokst. 

 according to an autograph determination-label of Miquel. I found 

 this specimen in the Leiden Herbarium, registered as H. L. B. n. 10 

 (^99 — 173) a nd can confirm the accuracy of the determination of 

 Jünghühn and of Miqdel, for I found on the young branches of 

 Junghuhn's specimen, which already bore fruit, that of 14 leafwhorls 

 which I examined, 13 had 7 vaginal teeth and 1 only 6 teeth; the 

 fruit had 12 longitudinal rows. There can therefore be no doubt 

 that this specimen of Jungrthn from the Lawoe mountains is com- 

 pletely conspecific with the beaeh-Casuarina (C. equisetifolia Forst.), 

 the more so, since also all other characteristics, e.g. the deeply grooved 

 internodes, 7, — V 4 cm. long and l /« mm. thick, agree completely 

 with this species. This is the first observed case, so interesting 

 phytogeographically, of the beach Casuarina (C. equisetifolia) growing 

 wild in the mountains of Java. The height of this station above 

 sea level is not indicated by Junghuhn on the label quoted above. 

 The other Javanese specimens of the State Herb at Leiden and 

 at Utrecht, found by me, are: "Java, on the beach near Batavia 

 and Anjol (leg. Jungh.); Java (Korth. ; Reinw. ; Teijsm.). In the 

 Herbarium at Buitenzorg there are according to Koord, and Valeton 

 [Bijdr. Booms. Java X (1904) 271] some specimens from the 

 Rahoen-Idjen mountains in Eastern Java, which mostly have 8 vaginal 

 teeth. It appears to me, that we are quite as justified in placing 

 these specimens from the Idjen-plateau under C. equisetifolia, as 

 Miquel (see above) in the case of the generally 8-toothed beach- 

 Casuarina of the West coast of Sumatra, and Koorders and Valeton 

 (1. c. 271) in the case of the beach-Casuarina of S.W. Ban ten in 

 Western Java, which generally has 7 — 8 teeth. If the specific limits 

 between C. montana and C. equisetifolia be drawn as indicated, the 

 distribution of C. equisetifolia in Java is as follows: Western Java: 

 in the S.W. of the residency Banteu, at sea-level, on a sandy sea-shore 

 on a narrow peninsula (= oedjoeng), at the edge of the surf, growing 

 socially (Herb. Kds in Mus. Bot, Hort. Bogor.). Central J a v a on 

 the Lawoe growing wild, together with C. montana (Herb. Junghuhn 

 in Leiden). Eastern Java: in the Rahoen-Idjen mountains, also 

 growing wild with C. montana (Herb. Kds in Mus. Hort. Bogor.). 

 ( ) e c o 1 o g i c a 1 conditions: Limited to soils, which always 

 have little water or which are physiologically dry (containing much 

 salt). Completely wanting on fertile soils, probably because it is 



