Palm Fern Blechnum appendiculatum
Palm Fern is an introduced perennial fern, found in Hawaii.
More about this plant
Blechnum appendiculatum is a fern in the family Blechnaceae. It is commonly known as hammock fern, sinkhole fern, and New World midsorus fern. Its native range is from the southern United States through Mexico, the Caribbean and Central America to western South America. It grows in rocky hammocks and moist forests. Wikipedia →
Palm Fern is flagged invasive in the U.S. These natives fill a similar niche — same growth habit, bloom season, height, and region — so you keep the look and feed local wildlife instead of spreading a problem.
Growing & care
USDA PLANTS · TRY- Lifespan
- Perennial
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts Documented caterpillar host
Recorded feeding on Blechnum in North America, including:
Related plants
More Blechnum →
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 (13) Open & cited
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PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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