Mudmats Glossostigma cleistanthum
Mudmats is an introduced annual herb, found in the lower 48 states.
More about this plant
Glossostigma cleistanthum, also known as mudmat, is a freshwater aquatic plant native to Australia, New Zealand, India and East Africa. It is a cleistogamous plant, which is a type of self-pollinating plant that can propagate using non-opening flowers. Where growth is submerged, the leaves are between 0.5–2.5 inches long and bear closed, self-pollinating flowers. These leaves are nearly sessile and grow along the stem in alternating pairs that resemble rabbit ears. Where water recedes and growth is emergent, the leaves are much smaller, ranging between 0.2–0.5 inches in length. The emergent plants produce insect-pollinated flowers located on short stalks. It belongs to the family Phrymaceae which includes annuals and perennials. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 7 derived from its U.S. range
- Lifespan
- Annual
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How we know this (1) Methods & honest limits
We take the plant’s U.S. county range and look up each county’s long-term climate, then summarise: native rainfall = the median annual rainfall across its counties; heat tolerance = the warm end (90th percentile) of average temperature across its range (mirroring how our cold-hardiness floor uses an extreme). Counties + medians blunt the roadside/observer bias that makes point-level climate unreliable. Needs at least five placeable counties.
Honest limits: A realized, sampling-biased niche (where it has been recorded, not its physiological optimum), and county climate is coarse — large Western counties span deserts and mountains. Derived guide, never a measured fact.
Sources for this entry (12) Open & cited
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