46 



MINNESOTA BOTANICAL STUDIES. 



SERIES II. 



TABLE V. (a) 



CHECK 



Shady Habitat Sunny Habitat Shady Habitat 



Day Night Day Night Day Night 



Loss per Loss per Loss per Loss per Loss per Loss per 



sq. cm. sq. cm. sq. cm. sq. cm. sq. cm. sq. cm. 



in mg. in mg. in mg. in mg. in mg. in mg. 



The ratio of transpiration of polydemic forms measured in both 

 sun and shade is shown by the following table : 



T.\BLE VI. 

 Formula: Loss of Sun Form 

 Loss of Shade Form. 



I. Plants in their Wagnera Quercus Allium Poptdxis Fragaria Holodiscus 



natural habitats Day Night Day Night Day Night Day Night Day Night Day Night 



2.0 

 1.6 



1-5 

 I .2 



2.2 



2.0 



Maximum .. 2.7 4.5 3.2 

 Minimum .. 2.0 3.5 2.5 

 Av. of all val- 

 ues obtained 2.4 4.0 3.1 2.4 



II. Both forms 

 in sun — 



Ma.ximum .. 2.4 1.8 2.3 1.8 

 Minimum .. 2.02 1.6 1.7 1.5 

 Av. of all val- 

 ues obtained 2.3 1.8 2.2 1.5 2.0 1.4 2.1 



III. Both forms 

 in shade — 



Maximum .. 2.8 3.0 2.3 1.4 1.5 1.3 3.1 

 Minimum .. 2.0 2.5 .6 i.i 1.3 i.o 2.0 

 Av. of all val- 

 ues obtained 2.5 3.0 1.6 1.3 1.3 1.3 2.6 



2.7 2.7 4.3 3.81 3.62 3.3 1.7 2.0 



1.8 2.9 2.6 2.84 3.33 3.1 1.4 1-5 



1-7 

 1.6 



.6 4.0 3.6 3-5 3-3 1-6 1.7 1-7 



4-4 

 2. 2 



3-2 



2. S3 

 I .0 



1-4 

 1 .2 



1-4 



3-7 

 2.2 



1-7 

 1-4 



1.6 

 1-5 



1.6 

 I . I 



1.6 

 1 .2 



1-4 



1.8 

 1-4 



1-4 1-5 



