524 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



is consumed in preparing flowers than in preparing wood, and 

 that the flowers commenced growth about the time the wood 

 ceased forming. 



In Xew Hampshire buds collected March i8, 1913, show well- 

 established flower parts, as seen in plate 35, figures 3, 4, and 5. 

 The sporogenous tissue however was not distinct in the anthers. 

 By April 14, 1913, the anther wall, sporogenous tissue, and tapetum 

 were dift'erentiated, as shown in plate 36, figures 3 and 4. The 

 following season, 1914, the buds were a little later in their develop- 

 ment. The sections shown in plate 35, figures i and 2, were 

 taken from buds collected April 23, 191 5. No differentiation 

 other than the shape of the growing apex was observed, showing 

 that very little growth had taken place during the preceding 

 season. The buds for 1916 dissected on July 3, 1915, and July 

 20, 191 5, showed no differentiation into leaf or mixed buds. If 

 second growth occurred in the late summer of 1915 some of these 

 buds might have produced floral parts, as flowers can develop on 

 second growth. It is evident that the time of bud differentiation 

 and flower formation in New Hampshire is somewhat variable. 

 The primordia of the flowers may or may not be established in 

 one growing year. 



2. The INFLORESCENCE 



The inflorescence of the apple has been described by different 

 writers as a cyme, an umbel, a corymb, a corymbed cyme, and an 

 umbel-like cyme. Loudon (9) in 1844 states that the flowers in 

 the apple are in corymbs and in the pear in umbels on simple 

 pedicels. In the description of the genus Pyriis by Bentham and 

 Hooker (10) the inflorescence is given as a cyme and rarely a 

 corymb. Decaisne (11) uses the term corymb and calls the 

 flower stalks peduncles in his Memoir on the families of the 

 Pomaceae. The first six editions of Gray's (12) Manual of 

 Botany describe the inflorescence in the section Malus as a cyme 

 simple and umbel-like. In the seventh edition of the Manual 

 (13), the inflorescence is given as a corymbed or umbel-like cyme 

 for the genus Pyrus and the flower stalks of Pynis Mains are called 

 pedicels. In the Field, Forest, and Garden Botany by Gray (14) 

 the inflorescence is called a simple cluster or simple umbel and 

 the flower stalks are termed peduncles. In a revised edition 

 of the TMeld, Forest, and Garden Botany (15) the flowers are 



