IV.] MUSTARD. ROSE 31 



said to be caducous. You find the calyx consists of two, 

 or sometimes of three, distinct sepals, inserted outside of 

 and below the other organs of the flower. The corolla 

 consists of four or six free petals. The stamens are very 

 numerous and free. The pistil, like that of the Orange, 

 consists of numerous cohering carpels, as indicated by the 

 lobes or rays of the stigma. In the Horned-poppy the 

 coherent carpels are four to six in number, while in the 

 true Poppies they are indefinite. If the ovary be cut across, 

 there will be found as many projecting plates or lines bear- 

 ing ovules as there are stigmas, so that the syncarpous 

 character of the pistil cannot be doubted. The Poppy may 

 be described as with — 



Calyx inferior., 2.Xidi polys epalo us {caducous). 

 Corolla hypogynous dind. polypetalous. 

 Stamens hypogynous and polyandrous. 

 Pistil syncarpous., ovary superior. 



3. Indian Mustard, or Rape {Brassica). — Either will 

 do. There are four free sepals, four free equal petals and 

 six free stamens, of which four are long and two short 

 (hence called tetradynamous). The slightly two-lobed stigma 

 indicates the syncarpous condition of the pistil, which is 

 regarded as consisting of, at least, two coherent carpels. 

 The flower of Mustard or Rape may be described — 



Calyx i?ifertor, polysepalous. 

 Corolla hypogynous^ polypetalous, regular. 

 Stamens hypogynous, ietradyjtamous. 

 Pistil syncarpous., ovary superior. 



4. Rose {Rosa). — Any single-flowered rose will serve. 

 The calyx at first sight appears to consist of five distinct 



