72 



HOW PLANTS ARE PROPAGATED. 



213. MonopetaloiIS corolla ; i. e. a corolla of one piece. It is so called, whether it 

 makes a cup or tube with the border entire, as in Morning-Glory (Fig. 175), or with 

 the border lobed, that is, the tips of tlie petals separate, as in Stramonium (Fig. 177), 

 or even if the petals are united only at the bottom, as in the Potato- 

 blossom (Fig. 182). The same may be said of a calyx when the 

 sepals are united into a cup, only this is called Monosepalous. A mo- 

 nopetalous corolla (and so of a calyx) is generally distinguishable into 

 two parts, namely, its Tube or narrow part below, and its Border or 

 Limb, the spreading part above. It is regular when all sides and lobes 

 of it are alike, as in Fig. 176, 177, &c. It is irregular when the sides 

 or parts are different or unequal in size or shape, as in Sage, Dead- 

 Nettie (Fig. 181), the common Honeysuckle, &c. It is 



Tubular, when long and narrow without a conspicuous border, as 

 in Fig. 178, or 



Trumpet-shaped ; tubular, gradually enlarging upwards, as in Trumpet-Creeper 

 and Trumpet-Honeysuckle (Fig. 178) ; 



Funnel-shaped or Funnel-form (like a 

 funnel or tunnel) ; when the tube opens 

 gradually into a spreading border, as in 

 Morning-Glory (Fig. 175) and Stramoni- 

 um (Fig. 177) ; 



Bell-shaped or Campanulate ; when the 

 tube is wide for its length and the border 

 a little spreading, like a bell, as in Hare- 

 bell (Fig. 179). 



Salver-shaped; when a slender tube 

 spreads suddenly into a flat border, as in Phlox (Fig. 180). 



Wheel-shaped or Rotate ; same as salver-shaped, with the tube vei-y short or none, 



as in the corolla of the Potato (Fig. 182) and the 

 Nightshade (Fig. 183). 



Labiate or Two-lipped ; when the border di- 

 vides into two parts, or lips, an upper and a 

 lower (sometimes likened to those of an animal 

 with gaping mouth), as in Sage, Dead- Nettle (Fig. 

 181, and the like. This is one of the irregular forms of monopetalous corolla, 

 and the commonest. 



