i66 



THE REPRODUCTIVE ORGANS 



entire in the bud and encloses the young leaf. As the leaf 

 grows it bursts through the stipule, which remains as a thin 

 membrane surrounding the stem. 



The Buttercup (Fig. 112) has five free sepals (poly- 

 sepalous), and alternating with them are five free petals 



Fig. in. Marsh Marigold. ca, calyx ; si, stipule. 



(polypetalous). Examine the bases of these and note the 

 honey-glands. The stamens are numerous (indefinite), 

 and arranged spirally below the pistil ; they ripen before 

 the carpels, and in succession from without inwards. 

 The lower stamens first turn outwards and conceal the 



