Shoebutton Ardisia elliptica
Shoebutton is an introduced perennial tree, found in Hawaii and the lower 48 states.
More about this plant
Ardisia elliptica is an evergreen tree, also known as the shoebutton ardisia, duck's eye and coralberry, native to the west coast of India, Sri Lanka, Indochina, Malaysia, Indonesia and New Guinea. It is a prolific reproducer which has made it a successful invasive species in other locations in the tropics where it has been introduced as a garden ornamental. Wikipedia →
Shoebutton 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- Hardiness
- ≥ zone 11 derived from its U.S. range
- Lifespan
- Perennial
- Foliage
- Broadleaf
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts Documented caterpillar host
Recorded feeding on Ardisia in North America, including:
Wildlife & visitors 7 birds
Open records of who else uses Shoebutton — a generalist food-web signal, kept separate from the keystone Ecological Value.
Recorded eaten by 7 birds species (fruit, seed, browse) — the most-recorded:
Related plants
More Ardisia →
How we know this (2) Methods & honest limits
We read each species’ measured specific leaf area (leaf area per unit dry weight) from the Global Spectrum dataset and band it: thin & fast (high SLA), medium, or thick & tough (low SLA). The global median is about 10 mm²/mg.
Honest limits: A species-mean from pooled measurements — individual plants vary with light and site. A broad strategy signal, not a precise per-plant figure.
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 (16) Open & cited
Cite this page Open data, please attribute
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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