216 THE JOURNAL OF INDIAN BOTANY. 



ation showed a sensitiveness to drought. The leaves took on a 

 purplish-red tinge while even the corolla had many fine streaks 

 of the same colour, doubtless due to anthocyanin pigments." 



The corolla length was found to be very variable with reference 

 to the calyx length. No measurements were made. 



IV. S. orobanchoides:— This is a well marked holoparasitic species 

 in which the writer has noted no striking variations. It is net 

 common in ordinary grasslands, the few specimens that the writer 

 has seen being from a forest reserve en a hillside near Poona. 



Conclusion 



The" Scrophulariacece is an order with apparently a history 

 of variation, if one may judge :by the sub-orders, classes and 

 genera into which it is divided. Striga itself provides what is 

 apparently a recent mutant. Strigina, described by Engler x differ- 

 ing from Striga in having the two anterior stamens reduced 

 to staminodes. The question arises : Are the two colour forms 

 of S. I idea and the plants with different sizes and shapes of 

 corolla in S. dens i flora to be put in different species ? The only 

 answer to this question can be got by growing the plants in pure 

 culture, and up to date the writer has not succeeded in germinating 

 Striga seed either by itself or in contact with host roots. 



Naturliche Pflanzenfamilien, Nachtrage zum IV. Teif. 



