206 



GAMOPETALOUS COROLLAS. 



320) ; tubular, having a long cylindrical tube, appearing continu- 

 ous with the limb, as in Spigelia (fig. 311), and Comfrey (fig. 321); 

 rotate or wlieeir shaped, when the tube is very short, and the limb flat 

 and spreading, as in Myosotis (fig. 322) ; when the divisions of the 

 rotate corolla -are very acute, as in Galium, it is sometimes called 

 stellate or sta/r-lihe ; urceolate or urn-shaped, when there is scarcely any 

 limb, and the tube is narrow at both ends, and expanded in the middle. 



IX^^^J. 



Fig. 818. 



Hg. 819. 



Fig. S20. 



Fig. 321. 



as in Bell-heath (Erica cinerea) (fig. 323). Some of these forms may 

 become irregular in consequence of certain parts being more developed 

 than others. Thus, in Veronica, the rotate corolla has one division 

 much smaller than the rest, and in Digitalis there is a slightly irregular 

 campanulate corolla (fig. 312), which some have called digitaliform. 



Ieregxjlar Monopetalous oe Gamopbtalous Cokollas. — 

 Among these may be remarked the labiate or lipped (fig. 324), having 

 two divisions of the limb in the form of what are called labia or lips 

 (the upper one composed usually of two united petals, and the lower of 

 three), separ.ated by a hiatus or gap, I. In such cases the tube varies 

 in length, and the parts of the calyx follow the reverse order in their 

 union, two sepals being united in the lower lip, and three in the upper. 

 When the upper lip of a labiate corolla is much arched, and the lips 

 separated by a distinct gap, it is called ringent (ringens, grinning). 

 The labiate corolla characterises the natural order Labiates. In Lobelia 



Fig. 818. Regular monopetalous or gamopetalous campanulate or bell -shaped corolla of 

 Campanula rotundifolia. c, Calyx. I, Limb of corolla, s, Stigma. Fig. 319. Regular 

 monopetalous or gamopetalous infundibuliform corolla of Nicotiana Tabacum, Tobacco. 

 c. Calyx. I, Limb of corolla, s. Stigma. Fig. 320. Regular monopetalous or gamo- 

 petalous hypocraterifoi-m corolla of Primula elatior, Oxiip. c, Calyx, p^ Corolla, i, Tube. 

 I, Limb, a. Anthers. Fig. 321. Regular gamopetalous tubular and somewhat bell- 

 shaped corolla of Symphytum ofBoinale, Comfrey. c, Calyx, t, Tube of corolla. 

 I, Limb, s, Stigma, r, External depressed surface of folds, which project into the tube of 

 the corolla. 



