PERIANTH, OK FLOWER-LEAVES. 



C4T 



stamen and stigma, differs from the rest in shape and in being 

 nectariferous (as in Fig. 400) ; it is named the LABELLUM. 



Galeate is a term applied to a corolla the upper petal or part 

 of which is arched into the shape of a casque or helmet, called 

 the Galea; as in Aconite (Fig. 357) and Lamium, Fig. 479. 

 In the former the galea is of a single petal ; in the latter, it 

 consists of two, completely united. 



450. Gamophyllous forms with special names are chiefly the 

 following. Illustrations are usually taken from the corolla, but 

 the forms and terms are not peculiar to it, excepting the first, 

 viz. the 



Ligulate or Strap-shaped corolla (Fig. 288, &c.), which is 

 nearly confined to Compositse. Here a corolla, formed of three 

 or five petals, imitates a single petal, except at its very base, 

 which is commonly tubular : the remainder is as though the tube 

 had been split down on the upper side and flattened out. The 

 corolla of Lobelia, type of a family most nearly related to Com- 

 positse, illustrates this. (Fig. 488.) 



451. The names of the general forms are mostly taken from 

 some resemblance to common objects. All those in common 

 use will be found in the Glossary : a few leading ones are here 

 specified. They may be divided into the regular and the irregu- 

 lar. The principal irregular form with a special name is the 



Labiate, or lipped, also' termed Bilabiate, as there are two lips, 

 an upper and a lower (superior and inferior, or anterior and 

 posterior, 290) , although one of them is sometimes obscure or 

 abortive. This bilabiate character in the corolla, and often in 

 the catyx also, pervades several orders with gamopetalous 

 flowers, and gives name to one of them, the Labiatse, to which 



FIG. 477 Campanulate corolla of the Harebell, Campanula rotumlifolia. 478. 

 Salverform (hypocraterinicrphous) corolla of Phlox. 479. Labiate (ringent) corolla of 

 Lamium ; a side view 480. Personate corolla of Antirrhinum or Snapdragon. 481. 

 Personate corolla of Linaria, spurred (calcarate) at the base. 



