246 



THK FLOWl'.R. 



of Mignonette (Fig. 877). In certain cares an analogous division 

 takes place in the opposite direction, ?o that the 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 Vertical Chorisis. The most familiar case is that 

 of the crown, or small and mostly two-lobcd 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 dedoublement or vnlining, i. c. 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 3:8 



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

 cases the appendage occupies the inner side of 

 or stamen, and that it is commonly two-lobed 

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

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

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

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

 379 to the base into three lobes, which look much like abortive 

 stamens. The 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 



le petal 



Again, 



FIG S78 A petal of Silene Pennsylvaniea, with its crown or appendage. 



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

 on the inner 6ide 



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

 with the appendage that standd befoic it. 



