Violets are divided into
two main types. If you look at the leaves and flowers; their petioles
(the flower and leaf stem) either branch from an aerial stem or appear to grow
directly from the ground. If they appear to sprout from a
stem, they are considered stemmed varieties. If they appear to sprout from
the ground, they are considered stemless. Sometimes early in the season,
stemmed varieties may appear to be stemless, but if you look closely, you will
be able to tell the difference.