148 GROWTH AND WORK OF PLANTS 



with (adnate to) the wall of the ovary with the short calyx limbs 

 projecting from the upper surface. The petals and stamens are 

 inserted on the edge of the calyx tube above the ovary; they 

 are, therefore, epigynous, and the ovary being under the calyx, 

 as it were, is inferior (see also the evening primrose, fig. 115). 



Fig. 105. 

 Flower of pear. (After Warming.) 



FLOWER CLUSTERS. 



237. Flowers are solitary or clustered. Solitary flowers 

 are either axillary, i.e.., on short lateral shoots in the axils of the 

 ordinary leaves; or they are terminal, i.e., they are borne on the 

 end of the main axis of an ordinary flower shoot. In either case 

 they are so far separated, and the leaves are so prominent, that 

 the flowers do not form distinct groups or clusters. The manner 

 of arrangement of flowers on the shoot is called inflorescence, 

 while the group of flowers so arranged is the flower cluster. 



Two modes of inflorescence are usually recognized in the 

 arrangement of flowers on the stem. i. The corymbose inflores- 

 cence, in which the flowers arise from axillary buds, and the 

 terminal bud may continue to grow (indeterminate inflorescence) ; 

 2. the cymose inflorescence, in which the flowers arise from ter- 

 minal buds. This arrests the growth of the stem (determinate 

 inflorescence). 



238. Corymbose flower clusters. The more prominent 

 kinds are as follows: 



i. The raceme. The flower shoot is more or less elongated, 

 and the leaves are reduced to a minute size termed bracts, while 



