292 



THE STEUCTUEE OF FI.OWEES. 



I have also found the sepals ovuliferons in a monstrons 

 form of Violet, which was almost entirely virescent (Fig. 71). 



Progeessive Changes of the Coeolla. — For petals to 

 become staminoidis far from uncommon. It is a normal con- 

 dition in Atragene (Fig. 44, p. 141), which illustrates the 

 transition, and in "Water-lilies, where a gradual development 

 of the anther cells is accompanied by a gradual reduction of 

 the petal to a filament. As abnormal instances may be men- 

 tioned, a case of Foxglove which I have elsewhere * described 

 as having the corolla split up into strap-shaped antheriferous 

 processes (Fig. 72), and a Columbine in which the spars 



Fig. 10 Calyx of Garden Pea, 



with carpellary lobes (after 

 Masters). 



Fig. 71. — Ovullferous 

 sepaL of Violet. 



Fig. T2.— Corolla of Fox 

 glare, with staminate 

 tube. 



became curionsly coiled and bore pollen within the tissue of 

 the coils (Fig. 73). 



Pistiloid petals are of rare occurrence. As an example is 

 Begonia (Fig. 74, a), in which the apex of the petal was 

 green and stigmatiform, the basal part being broad, coloured, 

 and ovnliferous. Fig. 74, bj shows a petal, ovuliferons below, 

 stigmatiferous at the summit, and antheriferous midway ; 

 c is a rudimentary ovule. 



Peogeessive Changes in the Stamens. — The only change 

 * Journ. Linn. Soc. Bot., vol. xv., p. 86, tab. 3. 



