162 



stisrma abnormal. In flower II the corolla between two lobes 

 is split up ^), for the rest the flower is normal, but judging 

 from the position of the lobes and of the stamen turned to the 

 right as much as V- of ^ circle. 



2. Tetramerous flower. Fig. 69. Four sec^ments of the calyx, 

 a, h, c, d, four corolla lobes, of which e and / unstriped, g 

 and h each with two dark stripes and a stamen between them, 

 staminodes between the other petals. 



3. Pentamerous flower. Fig. 70. Corolla five-lobed, each lobe 

 with thi-ee dark stripes, between / and / the tube is split up 

 midway. Stamens five, of which that between / and j has three 

 anther-cells and a filament that indicates doubling. This sta- 

 men springs from the junction of two projecting ridges at 

 either side of the cleft in the corolla. 



4. Svnanthy. Coalescence of the peduncles as in 1. There 

 are 9 calyxlobes, of which one placed at the boundary of both 

 flowers is evidently equivalent with two. Corollas quite free, in 

 flower I three segments are unstriped, the two other ones 

 marked with resp. two and three stripes. Only between these 

 there is a stamen, whereas there are staminodes between the 

 other lobes. In flower II three segments are unstriped and two 

 bear two stripes each. Also in this flower only one stamen 

 between the striped lobes, for the rest staminodes. 



5. On the same plant there is a stalk with two fairly ripe 

 fruits, which are twisted round one another to the right, the 

 fruitstalks united almost as far as the top. 



6. Young pitchershaped leaf. 



ACAXTHACEAE. 



Acanthus montanus T. And. 



Habitat Tropical Africa. 



Coll. October and November 1895. 



In order to facilitate a judgment of the way in which some 

 Acanthus-leaves deviate we give beforehand a description of a 

 normal leaf. 



1) PfiNziG has made the same observation in his garden in Genoa, I.e. II, p. 224. 



