246 



THK FI-OWKU. 



of Mignonette (Fig. 377). In certain cases an analogous division 

 takes place in tlie opposite direction, so that tlie parts or lobes are 

 situated one before the other. An indication of this is also mani- 

 fest in the petals of Mignonette, the lower part or broad claw 

 of which is slightly extended at its summit, on each side, beyond 

 the origin of the many-cleft limb or blade. Division in this direc- 

 tion has been termed 



458. Transverse or Yertiral Cliorisis. The most familiar case is that 



of the crown, or small and mostly two-lobed ap- 

 pendage on the inside of the blade of the petals 



of Silene (Fig. 378) and of many other Caryo- 



phyllaceous plants. This is more like a case of 



real dedouhlement or unlining, i. e. a partial sepa- 

 ration of an inner lamella from the outer, and 



perhaps may be so viewed. Stamens sometimes 



bear a similar and more striking appendage, as 



in Larrea, for example (Fig. 379), and most 



other plants of the Guaiacum family ; also in the 



Dodder (Fig. 1044). Let it be noted that in all such 

 cases the appendage occupies the inner side of the petal 

 or stamen, and that it is commonly two-lobed. Again, 

 before each petal of Parnassia (Fig. 381), although 

 slightly if at all united with it, is found a body which in 

 P. jitdustris is somewhat petal-like, with a considerable 

 number of lobes, and in P. Caroliniana is divided almost 

 to the base into three lobes, Avhich look much like abortive 

 Tlie true stam- • 



ineal circle, however, oc- 

 cupies its proper place 



within these ambiguous 



bodies, alternate with the 



petals. We cannot doubt 



that the former are of the 



same nature as the scale 



of the stamens in Larrea, 



and the crown of the petals 



379 



stamens. 



FIG. 378. A petal of Silene Pennsylvanica, with its crown or appendage. 



FIG. 379. A stamen of Larrea Mexicana, with a .soale-like appendage cohering with its base 

 on the inner side. 



FIG. 380. Diagram (cross-.section) of the flower of Parnassia Caroliniana. 381. A petal, 

 with the appendage that stands before it. 



