36 



STRUCTURAL BOTANY. 



Mallows, corolla of Kalraia, etc. 3d, Campanulate, or -bell- 

 shaped; when the tube widens abruptly at base and gradually 

 in the border, as in the Harebell, Canterbury-bell. 4th, Urceo- 

 late, urn-shaped ; an oblong or globular corolla with a narrow 

 opening, as the Whortleberry, Heath. 5th, Funnel-form (in- 

 fundibuliform), narrow-tubular below, gradually enlarging to 

 the border, as Morning-glory. 6th, Salver-form (hypocrater;- 

 form), the tube ending abruptly in a horizontal border, as in. 

 Phlox, Petunia, both of which are slightly irregular. 7th, Tubu- 

 lar ', a cylindraceous form spreading little or none at the border ; 

 as the calyx of the Pink, corolla of the Honeysuckle. It is often 

 a little curved. Tubular flowers are common in the Composite, 

 as the Thistle, Sunflower, when they are often associated with 

 the next form, the ligulate. 



64 ~ 62 



Forms of cornlltix. 62, Campanula Americana; rotate. 63, Campanula divnrieatrt. 61, Andromeda; 

 nreeolate. 65, Convolvulus (Morning-glory). 66, Petunia. 67, Lonicera sempervirens (Honeysuckle). 



68, Dandelion: liguhite corolla (r), 5-toothed; , five anthers united into a tube around x, the style 



69, Synandra gnindiHora, ringent, upper lip 2-lobed, lower 3-lobed. 70, Linaria (yellow Snapdragon,, 

 personate 71, Cypripedium acaule, orchidaceous. 



103. Gamopetalous-irregular perianths may be either li.g- 

 ulate 01 labiate. The Ligulafa corolla (ligula, tongue) is formed 

 as if by splitting a tubular corolla on one side. The notches at 

 the end plainly indicate the. number of united petals composing 



