SECTION 8.] MODIFICATIONS OF THE TYPE. 



yl 



Tubular ; when prolonged into a tube, with little or no spreading at the 

 border, as in the corolla of the Trumpel Honeysuckle, the calyx of Stra- 

 monium (Fig. 2 16 ). etc. 



261. Although sepals and petals are usually all blade, or lamina (123), 



like a senile leaf, yet they may have a contracted and stalk-like base, an- 

 BWering tO petiole. This 

 is called its Claw, in 

 Latin Unguis. I r ngmieu- 

 late petals are universal 

 and. strongly marked in 

 the Pink tribe, as in 

 Soapwort (Kg. 248). 



262. Such petals, and 

 various others, may have 

 an outgrowth of the in- 

 ner face into an appendage or fringe, as in Soapwort, and in Sileiie (Fig. 



259), where it is at the junction of 



claw and blade. This is called a 



Crown, or Corona. In Passion- 

 flowers (Fig. 2G0) the crown consists 



of numerous threads on the base of 



each petal. 



203. Irregular Flowers may be 



polypetalous, or nearly so, as in the 



papilionaceous corolla; but most of 



them are irregular through coales- 

 cence, -which often much disguises 



the numerical symmetry also. As 



affecting the corolla the following 



forms have received particular names : 

 264. Papilionaceous Corolla, 



Fig. 261, 262. This is polypetalous, 



except that two of the petals cohere, 



usually but slightly. It belongs only 



to the Leguminous or Pulse family. 



The name means butterfly-like; but 



the likeness is hardly obvious. The 

 names of the five petals of the 



papilionaceous corolla are curiously 



incongruous. They are, 



Fig. 'Jf''.). Unguiculate (clawed) petal of a Silene; with a two-parted crown. 

 Fi<;. 260. A small Passion-flower, with crown of slender threads. 

 Pro. 261. FYonl view of a papilionaceous corolla. 262. The parts of the Bame, 

 displayed: s, Standard, or W-xillum ; u\ Wings, or Ahv ; k, Keel, or Carina. 



