78 ELEMENTARY BOTANY 
Anemone, all have a conspicuous calyx. When the calyx is 
petaloid, the corolla is either absent or very much reduced. 
It is interesting to trace the 
development of nectaries in this 
Order. In the Buttercup, they 
are at the base of each peta 
underneath a scale. 
The petals of another species 
of Ranunculus (2. awricomus) 
show a great variety : there is 
the scalelike form; then each 
Fe fore Browan be petal may have pockets at the 
| HELLEBORE. base (Fig. 97); or, lastly, the 
‘n, petals modified into tubular whole petal may be tubular. 
eee A comparison of this species 
with the nectaries of the Hellebore helps us to understand how 
the modification of the petal into a tubular nectary has arisen. 
In the Marsh Marigold, the nectaries occur as little depressions 
on the sides of the base of each | 
carpel. Some few plants belong- 
ing to this Order are without 
honey. 
Clematis should be carefully 
observed, for it differs in many 
respects from the other genera. 
Its petioles are modified for 
climbing, the leaves are com- 
pound and opposite. There are 
no petals, and the styles are 
modified into organs of dis- 
persion. 


Fic. 102.—GYNACIUM OF 
MarsyH MARIGOLD. 
n, nectaries on each carpel. 
The Ranunculacew belong for the most 
part to the temperate zone. — Buttercups, 
Anemones, Celandines, so familiar to English children, are 
unknown to those living in tropical countries, for the 
Ranunculacee are hardly found in the tropics except on 
mountains. 
Distribution. 
