OSMOTIC PRESSURES IN PLANTS 



J93 



Table 30 (contd.). 

 Osmotic Pressures in Plant Organs (contd.). 



No. 



of 



Expt. 



014 

 615 



673 

 617 

 660 



498 

 495 

 496 



7 



548 

 546 

 545 

 677 

 573 

 576 

 651 

 652 

 653 

 654 

 1 



96 



547 



572 



634 



5 



39 



24 



27 



84 



665 



?> 

 ) > 



7> 



>1 



Hedera helix, N. aspect, leaves 



,, ,, S. aspect, leaves 



Helianthus multiflorus ,, 



Ilex aquifolium, mature ultimate leaves 



,, ,.. roots 



Iris germanica, leaves 



rhizome 



roots . 



Magnolia acuminata, leaves (crushed and 



diluted) 



Monstera deliciosa, leaves 



Mnsa sapientum ,, 



Passijiora quadrangular is, leaves .... 

 Pinus laricio , , .... 



Platycerium alcicome ,, .... 



Poltjpodium irioides ,, .... 



Populus alba, spring leaves 



,, ,, summer leaves 



,, ,, bark at 40 ft. level .... 



,, ,, ,, of root 



,, balsamifera, leaves (crushed and 



diluted) 



Pteris aquilina, leaves (untreated) .... 



Saccharum officinarum, leaves 



Selaginella mertensii, leaves and stems . . 



Syringa vulgaris, leaves 



(crushed and diluted) 

 (untreated) .... 

 Ulmus campestris, leaves (untreated) . , . 



Vitis veitchii, leaves (untreated) 



Wistaria sinensis, leaves beginning to wilt 



(untreated) 



,, ,, leaves fresh 



Tension in tracheae indicated by osmotic 

 pressures in leaves. In the foregoing table, as 

 a rule, only the maximum pressure observed in the 

 leaves or the roots of each species is recorded. As 

 a matter of fact, wherever sought, great variations 

 were found between different individuals of the same 

 species, and in the same individuals in different posi- 

 tions and under different conditions. In every case, 



o 



