30 



Guayule. 



Table 9. Station 2, quadrat 7, April 3, 1909. 



[The data for this table were obtained by pulling up, sorting, and weighing all the 

 plants on 100 square meters in a guayule field from which all the plants above 

 40 cm. tall had already been taken. (Plate 1, fig. A.)] 



1 All seedlings of 1908, except one of 1907. 



Table 10. Station 9, quadrat 2, April 14, 1909 (100 square meters, ridge of loma in 



hills {El Potrero) , east of Cedros) . 



