GAMOPETALOUS COROLLAS. 



207 



there is a labiate corolla, the upper lip of which becomes convex 

 superiorly, and is split to near the base. When the lower lip is 



Kg. 322. 



Kg. 323. 



Kg. 324. 



Pig. 325. 



pressed against the upper, so as to leave only a chink or rictiis between 



them, the corolla is said to be personate or mask-like (persona, a mask), 



as in Frogsmouth (fig. 325), Snapdragon, and some other Scrophu- 



lariacese, and the projecting portion, p, of the 



lower lip is called the palate. In some corollas 



the two lips become hollowed out in a remarkable 



manner, as in Calceolaria, assuming a slipper-like 



appearance, similar to what occurs in the labellum 



of some Orchids, as Cypripedium. The cakeolate 



(calceolus, a slipper) corolla of Calceolaria may be 



considered as consisting of two slipper-like lips. 



When a tubular corolla is split in such a way 

 as to form a strap-like process on one side with 

 several tooth-like projections at its apex, it becomes 

 ligulate {ligula, a little tongue), or strap-shaped (fig. 

 326). This corolla occurs in many composite 

 plants, as in the florets of Dandelion, Daisy, and 

 Chicory. The number of divisions at the apex 

 indicates the number of united petals, some of 

 which, however, may be abortive. Occasionally 

 some of the petals become more united than others, Kg. 326. 



Fig. 322. Regular gamopetalous rotate corolla of Myosotia palustris, or Forget-me-not. 

 c, Calyx, p, Corolla, r. Folds of the corolla, forming projections at the upper part of the 

 I tube, which are opposite to the lobes of the corolla. Kg. 323. Regular gamopetalous 

 urceolate or urn-shaped corolla of Erica cinerea, or cross-leaved Heath, c, Calyx, t. Tube 

 of corolla. I, Limb of corolla, d, Stigma. Fig. 324. Irregular gamopetalous labiate or 

 lipped corolla of Salvia pratensis. c. Calyx. *, Tube of corolla. I, Limb, forming two lipa, 

 having a gap or hiatus between them, s. Summit of style. Fig. 325. Irregular gamo- 

 petalous personate or mask-like corolla of Antirrhinum raajus, or Frogsmouth. c, Calyx. 

 t. Tube of corolla, having a gibbosity or swelling, a, at its base. I, Limb of corolla, g, The 

 faux or mouth closed by a projection of the lower lip, p. Fig. 326. Irregular gamo- 

 petalous ligulate floret of Catananohe cserulea. e. Calyx, with a quinqaefid limb united 

 inferiorly with the ovary, o. e. Stamens with united anthers, a (sy7umihBr<ms or syng&nesUms) 

 surrounding the style, s, with its bifid stigma.. 



