Fic. 68.—The penwiper-plant (Notothlaspi rosulatum) growing on stony debris of a river- 
terrace near Castle Hill (Canterbury). [Photo, L. Cockayne. 
Frc. 69.—Cushion of the North Island edelweiss (Leucogenes Leontopodium) 
growing as a member of the fell-field association on Mount Hector 
(Tararua Mountains). [Photo, B. C. Aston. 
