5 ^ 
Edith R. Saunders. 
6, Two small flattened structures, more or less coherent, in 
shape like miniature petals, but green, and remaining enclosed 
within the calyx. (Chiefly found in the arrested flowers). (See fig. 2). 
7. Two large petal-like structures, either only partly coherent 
and appearing like narrower or broader strips of a normal corolla, 
or completely fused (see figs. 7-10). 
( b ). Lower lip. 
The lower lip may be present as :— 
1. Three stamens with normal anthers resembling those of 
the androecium proper, or with the lobes slightly divergent (see figs. 
1 - 6 ). 
2. Three stamens with very divergent lobes to the anthers. 
The anthers thus become sagittate in form, whereas those of the 
androecium proper are oval (see figs. 8, 9). 
3. Two lateral stamens with broad flattened filaments, and 
an anterior structure which becomes increasingly petaloid, with an 
anther lobe on either margin. As the petal-like form of all three 
structures becomes more pronounced the anther lobes gradually 
disappear (see figs. 10, 11). 
4. A single petaloid structure of three coherent petals which 
shows progressive stages of fusion with the upper lip until a normal 
corolla results. 
Modifications of the Androecium. 
1. The posterior stamen may be present bearing a normal 
anther. Such cases occur rarely among the arrested flowers, and 
the ten stamens are then so arranged that the flower becomes 
almost actinomorphic. 
2. A small, often coloured, projection may arise from the rim 
of the flower-tube in the position of the posterior stamen, which 
may represent a stage in the suppression of this structure (see fig. 6). 
3. The filaments of two adjacent stamens may fuse so that 
the resulting single structure bears a double anther. 
In addition to the anther-bearing structures representing the 
corolla, described above, linear outgrowths of the tube—the 
“ lacinulce corollince ” of de Chamisso—are often to be found in those 
flowers exhibiting the more extreme degrees of staminody (see 
fig. 8). 
In all the heptandra forms the members of the corolla and 
androecium unite at the base to form a short tube region, so that 
these parts still become detached as a whole just as in the type. 
In the more extreme cases the stamens, instead of being grouped 
