46 



OBJECT LESSONS IN BOTANY. 



cohering (united) by their edges. The Convolvulus (Figs. 

 128, 144), the Phlox (Fig. 126), the Pink-root (Fig. 127), 

 &c., show a similar cohesion (union) of their petals into a 

 tube more or less complete^ 



Tig. 123. Pink : a, the five petals ; 

 J, the calyx, composed of five united 

 sepals, c, a bract; d, several bract- 

 lets. 



Fig. 124. Flower of Tecoma radicans 

 (the Trumpet-creeper) : c is the calyx, 

 composed of five united sepals ; t, the 

 tube ; «, the eegments of the corolla or 

 the petals, forming the border. 



75. The calyx with united sepals is called monosepalous, 

 and the corolla of united petals monopetalous (from the Greek 

 monos, one), from the mistaken idea that this calyx consisted 

 of only one sepal, &c. Oamopetalous and gamosej>alous are 

 similar words, used in the same sense. Opposed to these 

 terms are polysepalous and j)olyj)eialous {Greek jjolys, many). 



76. The gamosepalouB calyx or gamopetalous corolla, al- 

 though composed of several pieces, is described as a single 

 organ, and its lower part, formed by the united claws, 

 whether long or short, is the tuie (Fig. 124, t) ; the upper 



74. Describe the calyx of Pink ; corolla of Phlox. 



75. Meaning of the terms monopetalous, &c. 1 



76. Define the limb of a monopetalous corolla ; the tube ; the throat. 



