We will be covering 3 families as above during this family week.
As a non-botanist I had a curiosity to find similarities (and Differences)
in the families. So I searched the family Key given in the floras.
These are some of my observations.
The ranks in the key above the families are somewhat mentioned.
.......Of course all the three families come under the group of Polypetalae.
................Next level is Sepals usually adnate to the ovary.
......................Ovary superior.There is a prominent disc shaped
thalamus below the ovary.
(Often called as Disciflorae-an artificial group)
The above characters are common to all the 3 families.
Now the differentiating characters :
a) Stamens as many as petals or fewer...
b) Flowers irregular, dorsal sepals spurred ... ... *
Balsaminaceae*
b) Flowers regular; dorsal sepal not spurred ... .. *Geraniaceae*
c) Stamens twice as many as petals or numerous.....Unarmed group....leaves
not peltate
...disc not enlarged in fruit...leaves not gland dotted....(These
characters eliminate other families in the group) ...
...Flowers bisexual mostly herbs=====> *Oxalidaceae*.
Please correct me if there are any mistakes.
Dr Satish Phadke
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