(424 ) 



§ 6. Phyllogenetic note on Casuarina niontaoa Jungh. and on 

 C. equisetifolia Forst. 



In the Herbaria at Leiden and at Utrecht I found herbarium- 

 specimens of voting seedlings and of very young shoots, developed 

 from adventitious buds. 



Accompanying one of the former specimens I found a manuscript 

 note by Miquel, to the effect that these young seedlings had been 

 raised from seed of Casuarina montana, imported in 1846 from 

 Java to the Hortus at Rotterdam. These seedlings have on their 

 youngest twigs internodes of about 2 mm. length and \> t mm. 

 diameter, with 4 — 5 deep grooves; in the 24 leaf sheaths examined 

 by me, the number of vaginal teeth was as often 4 as 5, but never 

 more and never less. The accompanying note of Miquel, indicates, 

 however, thai although 4 5 vaginal teeth were most common, 

 he had also observed 6 teeth. The teeth are narrowly lanceolate and 

 finely acuminate. The stems of these seedlings are only 2 1 /, — 3 mm. 

 in diameter. Miqüel has added in autograph : "Casuarina montana 

 (nonaXior)" and below also C. Brunoniana. The species C Brunoniana, 

 which Miquel had described from young hot-house plants from 

 the Rotterdam and Berlin Gardens, afterwards proved to be nothing 

 but the "Jugendform" of Casuarina equisetifolia and C. montana. 

 From two authentics of this species in the Herbarium at Utrecht, I 

 could see that Miqukl himself has withdrawn his ( '. Brunoniana, 

 and regarded it partly as C. equisetifolia and [tartly as C.montana. 

 It appears to me possible, however, that all the specimens named by 

 Miquel C Brunoniana belong to C montana Jungh. only. For the 

 young specimens, named by Miquel as 6'. equisetifolia agree well 

 with this. Of young seedlings, which are derived with certainty 

 from C equisetifolia, I have here no material at my disposal for 

 investigation. In Java I have only observed the constant unusually 

 small number of vaginal teeth in young seedlings of C. montana, 

 of the var. tenuior. In the very young seedlings I examined, the 

 number was never more than 4- 6 as in the seedlings of C Bru- 

 noniana of the Utrecht Herbarium. 



Concerning a herbarium specimen (Kds 37348 ,* in Herb. 

 Lugd. Hat.) of Casuarina manhunt var. tenuior Miq., collected in 

 Oct. 1899 at 2000 m. altitude near Ngadisari on Mt. Tengger in 

 Eastern Java, I observed the following: The specimen consists of 

 ordinary fertile old branches, and of some young sterile shoots, which 

 had evidently developed from adventitious buds, after an older 

 thicker trunk had been cut down near the ground. These young 



