Mudmats
Glossostigma cleistanthum W.R.Barker

Glossostigma cleistanthum, known as mudmat, is a freshwater aquatic plant in the Phrymaceae family. It is native to Australia, New Zealand, India, and East Africa. The plant is cleistogamous, meaning it can self-pollinate through non-opening flowers. Submerged leaves are 0.5–2.5 inches long, nearly sessile, and grow in alternating pairs. Emergent leaves are smaller, 0.2–0.5 inches long, and produce insect-pollinated flowers on short stalks.
Description
Glossostigma cleistanthum is a freshwater aquatic plant found in the Phrymaceae family. It is native to Australia, New Zealand, India, and East Africa. The plant exhibits cleistogamy, a form of self-pollination using closed flowers. In submerged conditions, the leaves are 0.5–2.5 inches long, nearly sessile, and grow in alternating pairs along the stem, resembling rabbit ears. When water recedes, the emergent leaves are smaller, 0.2–0.5 inches long, and produce insect-pollinated flowers on short stalks. It is part of a family that includes both annual and perennial species.
Other common names
Mudmats
Distribution
Australasian · conterminous 48 United States · Connecticut · Delaware · Maryland · Massachusetts · New Jersey · New South Wales · New Zealand North · New Zealand South · Pennsylvania · Rhode I. · South Australia · Victoria

