92 Variation in the Corolla of Veronica Buxbaumii. 



DESCRIPTION" OF PLATE I. ILLUSTRATING VARIOUS 



FORMS OF COROLLA FOUND IN VERONICA 



BUXBAUMII. 



Fig. 1. Normal flower. 



Fig. 2. Two posterior petals. 



Fig. 3. Two anterior petals. 



Fig. 4. Three petals. 



Fig. 5. Six-petalled form having two posterior and two anterior 

 petals. 



Fig. 6. Rare form with three petals. 



Fig. 7. Four petals set obliquely. 



Fig. 8. Corolla with division of posterior petal indicated by a fold 

 seen from behind. 



Fig. 9. Three anterior petals. 



Fig. 10. Two posterior petals combined with three anterior petals. 



Fig. 11. Three posterior petals. 



Fig. 12. Lateral petal divided. 



Figs. 13 and 14. Irregular forms. 



Fig. 15. Corolla like fig. 7, but having imperfect division between 

 posterior petals. 



Fig. 16. Irregular form. 



Fig. 17. A very peculiar corolla. All the petals are unusually 

 narrow and the posterior is divided, the two halves being separated by 

 a space. 



Fig. 18. A "small flower" (see p. 81). 



Fig. 19. a, b, c, various forms of notching or imperfect division of 

 posterior petal, d, appearance of trifid division in posterior petal. 



Fig. 20. Two-petalled corolla. 



