Ill 



It is a well known fact that cotyledons, isolated from the em- 

 bryo, are sometimes seen to produce roots. Cotyledons of beans 

 e. g., put on a plate covered with moist blotting- paper, yield 

 them easily, especially in summer. In the tropics the same 

 result is very likely to be attained with a greater number of 

 plants than in temperate zones. That in Mangifera even a plant 

 may develop from a cotyledon. Masters has shown in Proc. 

 Linn. Society VI, 21, p. 24.') 



Germination within the fruit has repeatedly been observed"). 



SAPINDACEAE. 



Nephelium lapimceum L. 



Coll. Dr. J. J. S. „at the door" 1909. 



A fruit with two seeds. This is according to Dr. Smith of extreme- 

 ly rare occurrence. Of the 2 — 3 ovules in each ovary only one 

 ripens under normal circumstances. 



MALVACEAE. 



Hibiscus Rosa sinensis L. 



Habitat Java, Timor. 



The first thing that struck me in examining the flowering 

 branch sent from Buitenzorg was that the peduncles showed 

 only \/., of the length of what Miquel averages and also that 

 each peduncle is articulate, which seems not to have been no- 

 ticed by the same authority. To l^oth pecaliarities Mr. C. A. 

 Backer, however, has drawn attention^), as belonging to the 

 normal qualities of the species, i. e. articulate peduncles of 

 various lengths. 



Of the flowers only one can be said to be malformed in the 

 first place on account of its extraordinary width, secondl}^ of 

 the number of parts of the involucellum. We found 11 of 



1) Vide Penzig, Pflanzentei'atologie 1. p. 367. 



2) Bot. Jaarboek uitgcg. door Dodonaea Jrg. X Ghent 1898. 



3) »Flora van Batavia" Vol. I p. 133. 



Ann. Jard. Bot. Buitenz. 2e Ser. Vol. IX. 



