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 eylindraceous 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 liyuiate. 



65 e 64 - 62 



Forms of coroUa.t. 62, Campanula Americana; rotate. 63, Campanula divaricata. 64, Andromeda; 

 nrceolate. 65, Convolvulus (Morning-glory). 66, Petunia. 67, Lonicera serepervirens (Honeysuckle). 



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



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

 personate. 71, Cypripedium acaule, orchidaceous. 



103. Gamopetalous-irregular perianths may be either lig- 

 ulate 01 labiate. The Eiyulate 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 



