THE FLORAL S/LOO'J: 



423 



certain familiar objects, names are often used wliich relate to 

 these objects. 



Flowers are said to be regular, or irregular. In a regular 

 flower all of the parts of a set or series are of the same shape and 

 size, while in irregular flowers the parts are of a different shape 

 or size in some of the sets. The flowers of the pjea family (Papi- 

 Uonaic(T), of the mint family (Labiatar), of the morning glory, 

 larkspur, monkshood, etc., are irregular (fig. 450). The corolla 

 usuall\- giyes the characteristic form to the flower, and the name 

 is usual!}' ai>plied to the form rif the corolla. 



Some of the different forms are wlieel-shaped or rolale corolla 

 when the jietals spread out at once like the spokes of a wheel, as 

 in the potato, tomato, or bittersweet: salver-shaped when the 



Fiy. 450. 

 Several forms of flowers. Regular flowers, wh, wheel-shaped corolla; sa, 

 salver-shaped, iuh, tubular-shaped. Irregular flowers, pa, butterfly or papilio- 

 naceous; per, personate or masked flower; lab, gaping or ringent corolla. The 

 two latter are called bilabiate flowers. 



petals spread out at right angles from the end of a corolla tube, 

 as in the phlox; hell-shaped, or eainpaiiulate, as in the hareljcU 

 or campanula; junnel-shapcd, as in the morning glory; tubular, 

 when the ends of the petals spread but little or none from the 

 end of the corolla tube, as in the turnip flower or in the disk 

 florets of the composites. The biittcrfly, or papilionaeeous cor- 

 olla is peculiar as in the pea or bean. The upper petal is the 

 "banner," the two lateral ones the "wings," and the two lower 

 the "keel." 



The lahiate corolla is charctcristic of the mint family where 

 the gamosepalous corolla is unecjuafly diyided, so that the two 



