SYNGENESIA. 187 



The corolla is placed on the top of the ovarium, Fi - 

 or germen. It is either funnel shaped with the 

 upper part divided into five, or sometimes four 

 parts, in which case the florets are denominated 

 tubular, as shown in Fig. 192, or it is split on one 

 side, and spread open, in the form of a strap, in 

 which case the florets are called ligulate, as shown in the 

 right hand figure ; or is divided into two portions, of which 

 one is larger than the other, when it is called bilabiate, or 

 two lipped. 



The stamens are attached to the inside of the corolla, just 

 below the mouth, or limb. Their filaments are usually, but 

 not always, distinct ; their anthers are adherent by their 

 edges, and furnished with little membranous appendages at 

 the tip. 



The style of the pistil is filiform, or thread-like, and at its 

 upper summit is split into two linear spreading parts which 

 are the stigmas ; or the whole pistil consists of a single piece 

 from the base to the summit, the summit being the stigma. 



The florets in this class are either, 1 st, perfect, having sta- 

 mens and styles ; 2d, barren or staminate, having only 

 stamens; 3d, fertile or pistillate, having pistils only; or 4th, 

 neutral, that is, are destitute of either stamens or styles. The 

 several orders are distinguished by the above named circum- 

 stances. 



Order 1. Syngenesia (Bqualis. In this order the florets 

 are all perfect, containing both stamens and styles. 



Order 2. Syngenesia superflua. In this the florets of the 

 disk, or centre, are perfect, while those of the margin or ray, 

 contain only pistils. 



Order 3. Syngenesia frustranea. Here the florets of the 

 disk are perfect, those of the ray being neutral, that is, having 

 neither pistils nor stamens. 



Order 4. Syngenesia necessaria. In this the florets of the 

 disk have stamens, but no pistils, while those of the ray have 

 pistils but no stamens. 



Order 5. Syngenesia segregata. In this the florets are 

 all perfect, like those of the first order, but it differs from 



When is the corolla of a floret said to be tubular ? When is the floret 

 called ligulate 1 When bilabiate 1 Where are the stamens attached in 

 this class 1 How are the stigmas formed in this class ? When are the 

 florets, or flowers said to be perfect 1 When barren ? When are tho 

 florets, or flowers fertile ? When neutral ? 



