34 



PLANT HABITS AND HABITATS IN THE 



action to conditions of poor soil-aeration. Ilie-ficst. noticeable effect 

 of oxygen deprivation to the roots of Coleus sp. is the cessation of the 

 absorption of water (Free' and Livingston, 1915: 60). This is followed 

 by a cessation of growth and ultimate wilting of the shoot. 



J^rays Da&p 



Fig. 10. — ^Chief physical divisions and geographical plan of South Australia, after Howchio and 

 Gregory, with the 6, 10, and 16 inch isohyets. 



