270 



PLANT STKUCTUKES 



gcEo), wintergreen (GmiWieria), heather (Calluna), moun- 

 tain laurel (Kahnia), Azalea, Rhododendron (Fig. 25G), 

 Indian pipe (Monotrojya), etc. 



Pig. 255. Flowers of hcatli plants {Erica), phowinj^ coinijlotc flowers (.4), the sta- 

 mens wiih "two-horned" anthers which dischar<^e pollen through terminal pores, 

 and the lobed syncarpous ovary with single style and prominent terminal stigma 

 {li, C, />).— After Dkude. 



145. Convolvulus forms. — The well-known morning-glory 

 {Ipomma) (Fig. 209) may be taken as a type of the Convol- 



