Principles of Classification . 5 
The corolla is said to be regular or irregular, equal or 
unequal, when its figure is uniform, or otherwise, and 
the different parts of which it is composed are of the 
same size. 
The more common forms of a monopetalous corolla 
are the following: Bell-shaped, campanulata , as in 
campanula and hyacinth ; funnel-shaped, hifundihuli- 
JvrmiSf as in pulmonaria or lungwort ; salver-shaped, 
hypocrateriformis , as in the primrose ; wheel-shaped, 
rotatci, which is the same as salver-shaped, but with 
scarcely any tube, as in borage ; ringent, ringens , ir- 
regular and gaping, formerly called labiated or lipped, 
as in dead-nettle ; and personate, personata , irregular, 
and closed by a kind of palate, as in snapdragon. 
The polypetalous corolla is called cruciform, cruci 
Jormis , when the petals are disposed in the form of a 
cross, as in wallflower ; rosaceous, rosacea , when the 
petals are disposed like those of the rose ; papiliona- 
ceous, papilionacea , when they are irregular and 
spreading, and have the appearance of a butterfly. 
The corolla is said to be incomplete when some 
parts seem wanting ; and in some cases it is altogether 
wanting, although a diversity of opinion prevails whe- 
ther the calyx, which is present in some of these cases, 
should not be considered as such. 
Nectary . — The nectary, nectarium , is generally con- 
nected with the corolla, or forms part of it ; the nec- 
tary is distinct from the petals of the corolla in co- 
lumbine, it is -an elongation of the corolla in the 
violet, and a production of the calyx in Indian cress. 
Larkspur and monkshood furnish striking examples of 
the nectary in the spur-like appendages of their flow- 
ers j and a small gland at the base of the petals of 
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