104 MH. F. DAK-WIN ON THE EELATIOK BETWEEN ^' BLOOM 



)) 



"When there are no* stomata on the upper surface the state 



of things is expressed hj g, the letter S being employed in 



the denominator to show that the symbol expres-ses the distribu- 

 tion of the stomata and not of the hloom^ in which latter case the 

 letter B is employed. According to this plan the floating leaves 



S 



of water-plants would be symbolized by q: — no stomata on the 



under surface. Precisely similar symbols are used to express 

 the distribution of bloom : 



j^ = Bloom on the upper as well as on the lower surfiice. 







Bloom on the lower surface only. 



B 



-Q= Bloom on the vipper surface only. 







0=No bloom ou either surface. 



The leaves examined are divided into four classes according 

 to the distribution of the bloom, and each class is analysed into 

 groups according to the distribution of the stomata. 



The leaves forming Class ^ have no bloom on either surface ; 

 and those in Group 1 have no stomata on the upper surface. 



Class ^ — No bloom on either surface 



Group 1. — Stomata=^ 75 species. 



Acer platanoides. 



Aconitum Napellua. 

 A. Ijcoctonum, 

 Act£ca spicata. 

 jEgopodium Podagraria. 

 jEscuIus Hippocastanum. 

 Amygdalus comrmmis. 



A. persica. 



Aiulromeda speciosa. 

 Anemone japonica. 



Araucaria BidwelHi. 

 Asarum europaeum. 

 Asclepias curassayica. 

 Begonia hydrocotylifolia. 



B. quinquifolia. 

 Betula alba, 



Brexia niadagascariensis. 

 Broussonettia papjTifera, 

 Buxus sempervirens. 

 Camellia japonica. 



* In leaves usnallj described as having no stomata on the upper surface, 



there are often a fen scattered ones, especially near the veins* 



