110 



MR, F. DAKWIX OX THE RELATIOX BETWKEN *' BLOOil " 



surface, four Lave at leatst twice as luaiiy stomata above as below, 



38 / 93 \ 



while the remaining two leaves have the formula — (^ttt^I and 



41 VIOO/ 



77 



100 



Class 



B 

 B' 



Leaves with bloom on both surfaces. 







Group 5 ; or those in which the stomata are exclusively on the 



S 



lower surface. They are 16, or 38 per cent. 



Alstroemeria aurantiaca. 



(The stomata are on the phy- 

 sically lower, but morpho- 

 logically upper side.) 



Aquilegia vulgaris. 



Berberis sp. 



Bomarea Caldasii. 



Chelidoniuni majus. 



Corydalis capnoides. 



Cvtisus Laburnum. 



Euphorbia Cyparissias. 



Hypericum calycinum, 

 (Bad bloom above.) 

 Linaria vulgaris*. 



Oxalis sp. 



Poinsettia sp. 



Poterium Sanguisorba* 



Rhus sp. 



Robinia Pseudacacia. 



Rosa sp. 



Group ^ to ^. 



S 



1 



The next group comprises those in which there are stomata on 

 the upper surface, but in which they never equal those on the 

 lower surface in number. They are 14 in number, or 33 per cent. 



of the whole Class 



B 



B" 



Brassica oleracea 



Caladium sp. 



Chlora perfoliata 

 Crambe maritima 

 Erj-thrina cristata 



Glaucium sp. 



Mimosa pudica .. 



219 

 30l 

 6 

 10 



INI 



31 



12 



16 



0^ 



16 



6 



138 

 •S02 



1 



Pelargonium glaucum 



Rata graveolens 



6*4 



1 



6 



17 

 80 



18 



Tri folium prateuse 5= or' 



Sonchus oleraceus 



Thalia dealbata 



97 



Tritonia sp. 



Tropajolum (about) 



913 



17 



51 

 15 



30 



Lastly, there is the Group ^ to 



1-h.r 



, or those in which the 



♦ These species 



placed in Group ^, as the stomata on the lower 



surface are so much more numerous than those on the upper. 



