24 INTRODUCTION. 



The Monopetalous Corolla (Fig. 117.) consists of two parts : 

 the tube (a.), the narrow part generally enclosed in the calyx ; 

 and the limb (6.), the expanded part. The following varieties 

 of this kind of corolla may be mentioned : 



Strap-shaped, narrow and flat, unless at the base. 

 Tubular (Fig. 118.), consisting of a single piece, hollow and 

 of nearly equal thickness ; this term, however, is used with 

 great latitude, and, in the compound flowers, applies to corollas 

 of various forms. 



Spherical or Globose (Fig. 119.), narrow above and below, 

 and enlarged in the middle. 



Bell-shaped or Campanulate (Fig. 120.), having the form of 

 a bell, with the margin bent back. 



Cup-shaped (Fig. 121.), of nearly the same form, with the 

 margin straight. 



Funnel-shaped or Infundibuliform (Fig. 122.), inversely 

 conical. 



Salver-shaped or Hypocrateriform (Fig. 117.), when the 

 tube is cylindrical, but very long, and the limb expanded. 



Wheel-shaped or Rotate, the same as salver-shaped, with 

 the tube very short. 



Ringent or Gaping (Fig. 123.), when the limb is divided 

 into two parts, the upper more or less arched, the under oblong ; 

 these parts are called lips. 



Personate or Masked (Fig. 124.), when the limb is divided 

 into two parts, which are closely pressed together, the throat 

 being thus closed. 



The Polypetalous Corolla consists of two or more distinct 

 pieces or Petals. In each petal there are distinguished two 

 parts: the claw or unguis (Fig. 125, a.) which is the narrow 

 portion ; and the border or lamina (Fig. 125, ft.), the expanded 

 parts. The following are the principal kinds : 



Cruciform or Cross-like (Fig. 126.), when four petals, having 

 long claws, stand opposite to each other in pairs. 



Rosaceous (Fig. 127.), roundish petals, destitute of claws, 

 spread out in the form of a rose. 



. Papilionaceous or Butterfly -like (Fig. 128.) when five petals, 

 differing in form, stand together. These different petals have 

 particular names. The uppermost, which is commonly the 

 largest, is named the standard or vexillum. (Fig. 129.) The 

 two side petals, standing opposite to each other, are the ivings 

 or al&. (Fig. 130.) The two undermost petals form the keel or 

 carina. (Fig. 131.) 



