EXPLANATION OF TERMS. 



XXIX 



Papilionaceous : when the parts are so divided as to show a large upper 

 petal as the Standard, or Banner; the two side petals as wings ; and when 

 the two anterior petals are united into a shape resembling the prow of a 

 boat and which encloses the organs of reproduction. (Fig. 46.) 



Sometimes it happens that only one set of floral leaves is present, which 

 then is regarded as the calyx. The term Perianth, while sometimes 

 employed collectively to designate the organs of protection, is mostly used 

 in such cases as when the calyx and corolla are not distinguishable the one 

 from the other. Members of the lily family have perianths. 



The Stamens of a flower are composed of Filaments, or the Stalks which 

 uphold the Anthers, and the Anthers themselves. These latter are tiny 

 two-celled boxes which contain the Pollen, the fertilizing dust and the impor- 

 tant product of the stamens. (FiG. 47.) 



<-n 



Labiate^ 

 FIG. 44. 



Cruciferous. 

 FIG. 45. 



Parts 0/ Stamen. 

 FIG. 47. 



Exserted Stamens are those which protrude beyond the corolla. 



Included Stamens are those entirely within the corolla. 



Monodelphous Stamens are those which by their filaments are united. 



The Pistil, or Seed-bearing Organ, is composed of three parts ; the 

 Ovary, the Style and the Stigma. (FiG. 48.) 



The Ovary is the lower and enlarged part, which contains the ovules or 

 undeveloped seeds. 



The Style is the slender stalk projected by the ovary. 



The Stigma is the variously formed body which terminates the style. 

 Unlike all other parts of the plant it is not covered with an epidermis, but is 



