46 



OBJECT LESSONS IN BOTANY. 



cohering (united) by tlieir edges. The Convolvnhis (Figs. 

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

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

 tube more or less com]3lete. 



Fig:\2Z. Pink: a, the five petals ; 

 h, the calyx, composed of five united 

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

 lets. 



Fig. 124. Flower of Tecuma radicans 

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

 composed of five united sepals ; ^, the 

 tube ; s, the segments of the corolla or 

 the petals, forming the horde?'. 



75. The calyx with united sepals is called monosepaloiis^ 

 and the corolla of united petals monojpetaloiLs (from the Greek 

 monos^ one), from the mistaken idea that this cal^^x consisted 

 of only one sepal, &c. Garnopetalous and gamosejxdous are 

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



Bimi 



terms 2^x^ jpolysejpalous 2a\(}i polypetalous {Greek polys, many). 

 76. The gamosepalous 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 tuhe (Fig. 124, t) ; the upper 



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



75. Meaning of the terms monopetalons, &c. ? 



76. Define the limb of a monopetalons corolla ; the tube 



the throat. 



