spirally T-i^'is/ctl Races, 



551 



growth, as in Dipsaciis. Altogether I counted amongst 

 somewliat over 4600 normal stems, 53 more or less dis- 

 tinctly twisted ones in all degrees of dexelopment, 33 

 torsions extending over a greater part of the shoot and 



Fig. 130. The dark-ej-ed Viscaria (Viscaria oculala) with 

 spiral torsion of the main stem, a, the terminal flower 

 of this main stem ; the flowerstalk, first bent downwards 

 by the torsion, has subsequently turned upwards again. 

 /'. c, the normal straight portion below the twi^t ; (/. a 

 local interruption of the torsion ( igoo). 



