36 STRUCTURAL BOTANY. 



Mallows, eorolla of Kalmia, 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 (hypocrateri 

 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 Compositse, 

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

 the next form, the ligulate. 



65 



Form/i nf mrollas. 62, Campanula Americana; rotate. 63, Campanula divaricata. 64, Andromeda; 

 nrceolate. 65, Convolvulus (Morning-glory). 66, Petunia. 67, Lonicera sempervirens (HoueysuckleX 



68, Dandelion: ligulate corolla ('), 5-toothed; a, five anthers united into a tube around , the style. 



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

 personate 71, Cypripedium acaule, orchidaceous. 



103. G-amopetalous-irregular perianths may be either lig- 

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

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

 the end plainly indicate th<- number of united petals composing 



