39. Small lavender-pink 4 petal flowers at the bases of the leaves. July-October
Leaves clasp the stem. The sets of opposite leaves change direction by 90 degrees from the set above and below.
Plant is upright, stem is 4-angled (square). 4-20 in
Wet soil.
39. Small lavender-pink 4 petal flowers at the bases of the leaves. July-October