4^ The European Daisy. {zoy. 



apparently a depression of the leaf, it can easily be shown that the 

 folded-in lower surface of the leaf remains flat and the trough is 

 really formed by the elevation of two thick ridges on the outer:(upper) 

 surface. The anther cells appear to be formed in the tissue of these 

 ridges, which swell and approximate in pairs, corresponding to the 

 two lobes, the contiguous sides of each pair coalescing at base to 

 form the partition between the cells, which in dehiscence separate 

 from It on either side. The connective is of course the modified 

 midnb and m all these retrograde andiers is prolonged beyond the 

 lobes, making them apiculate instead of as in the normal form, emar- 

 ginate. 



The accompanying figures will make this description more intel- 

 ligible. Only few forms are shown, but it must be remembered that 

 all gradations from the leaf to the nearly perfect stamen were found 



EXPLANATION OF PLATE. 



I. 



Stamen completely changed into a leaf. 



2. Leaf unfolded, showing ridges of anther. 



3. Stamen appronching norma! form. 



4. Perfect stamen. 



'• "^''^rSgi^rtie'^r"'"^ '''' '''''- ""' ^'^ '^^"'^"'"■"^ ^'^-^ ^"-" 



6. Cross section of No. 2. 



7- Cross section of No. 4. 



8. Carpellary leaves of deformed pistil. 



9. Perfect pistil. 



10. Cross section of No, 3. 



THE EUROPEAN DAISY (Be//is pereunis) 



BY FRAXK H. VASLIT. 



This familiar little plant of our gardens often escapes from culti- 

 vation, but seldom succeeds in establishing' itself, probably on ac- 

 count of the dryness of our climate. 



It seems however to have met suitable conditions in one of the 

 glens of Tamalpais, where it has spread from the vicinity of the old 

 mill on the Throckmorton Ranch for more than a mile up and down 

 the creek and seems thoroughly established. In the uncultivated 

 state It of course reverts to its normal form, and is not " double" as 

 m the gardens. 



Although its white and purple-tipped flowers add considerably to 



the beauty of the meadows, it is not desirable as an inhabitant of 

 pasture lands. 



