

Fissidens Moss Fissidens taxifolius
Fissidens Moss is a moss native to North America.
More about this plant
Fissidens taxifolius, the common pocket moss, is a species of moss in the family Fissidentaceae. First described by Johann Hedwig in 1801, it is a small to medium-sized moss that typically grows in dense, yellowish-green to dark green tufts. The species is characterised by its distinctive flattened appearance, with leaves arranged in two opposite rows resembling tiny fern fronds, and by its pointed leaf tips with projecting central nerves. It can grow in artificial light and is known to form extensive turfs in suitable conditions. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 7 derived from its U.S. range
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 (11) Open & cited
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