136 



THE VEGETATIVE ORGANS 



two kinds of leaves : (i) fleshy scale-leaves, and (2) foliage- 

 leaves. Unlike the corm, a bulb consists mainly of leaves. 

 A bulb of the Squill, the Snowdrop, or the Hyacinth 

 should be compared with the Tulip. In these also we have 



Fig. 86 (1, 2, 3, 4). Successive Transverse Sections of 

 Tulip Bulb. a, anther; /.i, 2, and 3, foliage-leaves; g, pistil; 

 p, perianth ; s.1-5, scale-leaves ; st, stem. 



two kinds of leaves, but the bases of the foliage-leaves 

 persist, and become swollen with food-reserves, while the 

 green upper parts die away at the end of the season, leaving 

 a separation scar at the top of the swollen base. In the 

 Snowdrop, the short stem produces two narrow, green 



