} ed) 
Ley 
hee The External Form of Plants. Pe 117 
axil of each of the leaves, when the flowers form a true 
whorl, as in Hippuris (Fig. 211). 
The common peduncle of the inflorescence is sometimes 
extremely abbreviated, the sessile or very shortly pedicelled 
flowers standing upon it very closely crowded, as in the 
clover (Fig. 212). ‘The form of the inflorescence is then 
dependent on the nature of the termination of the peduncle. 
Malt 
Wat! 
Pic. 212.— Abbreviated in- Fic. 213.—Longitudinal section through the capi- 
florescence of clover. tulum of the burdock, Arctium Lappa. 
The common receptacle, or surface from which the in- 
florescence springs, is sometimes flattened out, and some- 
times swollen into a more or less hemispherical form (Figs. 
213, 214); these two variations being especially common 
in the order Composite, and characterising the capztulum ; 
or it is sometimes hollowed out into a pitcher-like form, as 
inthe fig (Fig. 21 5), constituting a hypanthodium ; or the 
separate flowers are buried in the fleshy receptacle, when it 
becomes a cenanthium, as in Dorstenia (Fig. 216). The 
receptacle itself is usually solid, but may be hollow (Fig. 214); 
