4 A DAY IN THE OBERLAND 



out low down on its arched stalk, and blocking the way 

 to the nectar in the cup of the flower. When the bee 

 pushes his head against these obstacles and forces them 

 backwards, the result is to swing the long arched stalk, 



FIG. i. Diagrams of the flower of the yellow sage (Salvia glutinosa) 

 a little larger than life. I. An entire flower seen from the side. 

 st. The stigma, a 2 . The pair of modified half-anthers which are 

 pushed back by the bee when inserting its head into the narrow 

 part of the flower. 2. A similar flower at a later stage when the 

 stigma, st., has grown downwards so as to touch the back of a bee 

 alighting on the lip of the flower, and gather pollen from it. 3. 

 Diagram of one of the two stamens. /. The stalk or filament of 

 the stamen. a 1 . The pollen-producing half-anther. co. The 

 elongated connective joining it to the sterile half-anther. 4. Sec- 

 tion through a flower showing ov. the ovary ; nee. the nectary or 

 honey-glands ; st. the style ; li. the lip of the flower on which the 

 bee alights. 5. Similar section showing the effect of the pushing 

 back of a 2 by the bee, and the downward swinging of the pollini- 

 ferous half-anther so as to dust the bee's back with pollen. The 

 dotted arrow shows the direction of the push given by the bee. 



