4. Salsola kali. Saltwort, 

 and 7, 3, 1, 6, 9, of tlie list of anntial plants ; besides 



10. Rlius toxicodendron. Poison ivy. 



11. Heliantlius, Sunflower. 



12. Arenaria peploides 



13. Atriplex hastata, orache. 



Tlie third plant zone is exposed to less xerophytic conditions, 

 Plants of tlilrd gone . 



1. Amopliila, Sand reed. 



2. Pnanis maritima, Beaoli pliin. 



3. Asclepias cornuta. Milkweed. 



4. Ruiaex acetocella. Sheep sorrel. 



5. Lenaria viilgaris, Biitter-and-Eggs. 



6. ■^^erhaseum thapsus, Mullen. 



7. Myrica cerifera. Bay berry. 



8. Art ernes ia candata. Wormwood. 



9. Chrysopsis falcata. Golden aster. 

 10. Artemesus stelleriana. Dusty Miller. 



besides 10, 7, 5, of first list and 10 of the second. 



Lathyriis shows sleep movements, its leaves assuming lateral 

 position during the day, thus preventing transpiration. Aramophila 

 has a strongly xerophytic leaf having the power of folding. It 

 has also a long, linear, migrating stem. 



Beaches are of two kinds, xerophytic and hydrop^ytic. In 



the former there is a ^one without plants, in the latter, plants 

 extend to the wdter's edge. 



