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April 29-30, 2011
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Southeastern, New Hampshire
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There are three main types of Forsythia in the Northeastern United States:
- Weeping Forsythia (Forsythia suspensa): Branches tend to curve/droop down as
the plant grows fairly wide. The pith (center portion of the branches) is hollow between
the nodes. Leaves are opposite and often 3-foliate, oblong-ovate or broadly ovate with
a toothed margin.
- Greenstem Forsythia (Forsythia viridissima): Branches grow upright. The pith
is chambered between the nodes. Leaves are opposite, lanceolate or oblong-lanceolate with
a toothed margin above the middle.
- Showy Forsythia (Forsythia x intermedia): Branches tend to curve/droop down as
the plant grows fairly wide. The pith is chambered between the nodes, especially the
upper branches. Leaves are opposite and sometimes 3-foliate. Toothed margin starting
1/4th of the way up the leaf.
There are many cultivars of Forsythia, especially the Forsythia x intermedia
variety. It is used for a very decorative Spring border along roads and in yards.
As you can see from the images below, the pith is chambered between the nodes.
But you have to look at a cross section along the length of the branch to see that
it is not hollow.
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