Harperella
Harperella
Seasonal Restriction Dates:
- N/A
Restriction Notes:
- Rocky or gravel shoals and sandbars along sunny margins of clear, swift-flowing streams occur within footprint.
Photo Credit: Center for Plant Conservation
Short Description from Oklahoma Wildlife Conservation:
The Harperella (Ptilimnium nodosum) is a perennial herb that grows to a height of 6 - 36 inches (in) (0.15 - 1.0 meter; m). The leaves are reduced to hollow, quill-like structures. The small, white flowers occur in heads, or umbels, reminiscent of a small Queen Anne's lace (Daucus carota) flower head. Flowers have five regular parts and are bisexual or unisexual, each umbel containing both perfect and male florets. Seeds are elliptical and laterally compressed, measuring 0.06 – 0.08 in (1.5 - 2.0 millimeters; mm) in length (Kral 1980, 1981). In pond habitats, flowering begins in May, while riverine populations flower much later, beginning in late June or July and continuing until frost.
Natural Habitat:
In wet soils near clear swift-flowing streams.
