SECT. I. OBOANOGRAPHY AND GLOSSOLOGY. 



9? 



consequently sessile. Sometimes the filaments cohere, and 



form a tube round the carpels, and the stamens are then 



termed " monadelphous " 



(fig. 97. a). When they 



cohere into two separate 



bundles, they are said to 



be " diadelphous ;" and 



when they appear in more 



than two, "polyadelphous." 



In some orders, but more 



particularly in the extensive order of the Composite, 



where this circumstance is universal, the filaments are 



free, whilst the anthers alone cohere, and form a ring 



round the pistil (6). This disposition of the stamens is 



termed " syngenesious." In some plants the filaments 



are dilated and closely resemble petals (c), to which 



organs they also frequently adhere through a greater or 



less extent. 



(98.) The Anther generally consists of two separate 

 lobes or pouches, which contain the pollen (fig. 8Q. d); 

 and this, when fully ripened, escapes through a fissure. 

 When the fissure is closed, excepting at one extremity, 

 the opening is a mere pore (fig. 98. a). In a very few 

 instances the pollen escapes 

 through vales, formed on 

 the face of the anther (6). 

 That part of the filament 

 by which it is connected 

 with the lobes of the anther, 

 is termed the "connective;" and although more frequently 

 obscure and of small dimensions, yet in some species it 

 spreads, or branches laterally, and keeps the two cells 

 wide apart (c). The cells themselves assume various 

 appearances, and sometimes only one is perfected. In 

 its earliest state, each is subdivided by a partition, which 

 afterwards disappears ; but in some cases it remains, and 

 then each lobe contains two cells. 



(99.) Pollen. The grains of pollen (fig. 99.) are 

 minute vesicles composed of one or two membranous 



