BIGNONIALS. 481 
distinguished from the Nightshades by the absence of a fifth 
stamen, or where the wxstivation of the corolla is imbricated. 
This serves to bring the Petunias into this order. The wstivation 
of the corolla, and a tendency to lose a part of the stamens, occurs 
in Verbascum. ‘The tendency of Antirrhinum is to form pouches, 
or spurs, as in ¢, Fig. 434, in which we observe the corolla 
taking an upward direction, when the spur is produced which 
apa 21 a ‘4—The jad ai me Cita pay eh Fig. Bae, Oy 
causes the Calceolaria to assume the slipper-like appearance ; ee 
_ this brings a whole tribe of lovely flowers into the order. The 
Species are generally acrid, bitter, and suspected. In the Foxglove 
_ (Digitalis purpurea, Fig. 434), and several other species, these 
- qualities become dangerous. es 
ee Seon periiiinen: Rodochiton, Collinsia, Pentstemon, Russellia, — S 
> Mimulus, Hemianthus, Digitalis, present us with a galaxy PY aoe 
y greenhouse and garden flowers such as scarcely any bce ae : 
a eer can produce. | . 
Schizanthus, Calceolaria, Alsen, Astirrhinean, Murandia, 
