BOTANICAL TERMS. 255 



ICOSAN'DRIA ; twenty stamens or more ; the name of 

 the twelfth class ; in which the stamens are all 

 attached to the calyx. [Plates 2. and 14.] 



IMPERFECT FLOWER ; wanting either stamens or pistils, 

 or both ; as in the classes Monoecia, and Dioecia, 

 [Plate 2.] In the Daisy, the florets of the border 

 having no stamens, are called imperfect. [Plate 21.] 



INCOMPLETE, flower ; wanting the calyx or the 

 corolla: as the Mezereon. [Plate 10.] 



INFERIOR; applied, principally, to the germen, when 

 it is placed below the cup : as in the Snowdrop. 

 [Plate 9.] 



INVOLU'CRUM ; a sort of calyx distant from the co- 

 rolla ; exemplified principally, but not exclusively, 

 in umbelliferous plants. In the Flowering Rush also 

 the calyx is an Involucrum. [Plate 11.] 



J 



JOINTED STEM ; having knots, or joints : like the straw 

 of Wheat, &c. [Plate 6.] 



KEEL ; the lowermost petal in a butterfly-shaped 

 blossom ; so called from its resemblance to the keel 

 of a boat. [Plate 19.] 



KNOTS ; the joints of the stem of Grasses and Reeds, 

 [Plate 6.] 



