206 The Romance of Wild Flowers 
large flowers for the accommodation of bees or other 
insects. | 
The very neat and charming little Ivy-leaved Bell- 
flower (Wahlenbergia hederacea), that grows in some 
of our bogs, agrees with Campanula, except that the 
somewhat round seed-vessel opens by several valves 
on its top between the calyx-lobes. 
In other genera of this Bell-flower family we get 
instructive hints of the probable manner in which the 
five separate petals have become united—in fact, the 
Harebell itself occasionally explains this to us by 
producing flowers with the corolla slit into five 
slender segments, a condition that we find perfectly 
normal in the flowers of the little Sheep-bit (Jaszone 
montanw), whose bright-blue heads are usually passed 
by as those of a small Scabious. A number of florets 
are included in an involucre, and when separated are 
found to consist of a top-shaped calyx ending in five 
long narrow lobes; a corolla split to the base into 
five slender lobes, which at first are joined by their 
edges. There are five stamens, the anthers connected 
by their lower portions and the tips free. The style 
has a club-shaped extremity marked with the hairy 
ridges, and developing two short stigimas. 
_ The Round-headed Rampion (Phytewma orbiculare) 
bears similar heads of deep-blue flowers; but though 
the corolla is slit into five slender lobes, these are 
joined together by their edges, though eventually 
they become free. Its congener, the Spiked Rampion 
(P. spicatum), has the petals permanently attached 
by their upper portions, but the anthers are free. 
The remaining genus, Lobelia, of which we have 
two native species, gives us a remarkable adaptation 
