Fauna
Plant

Trifoliate Orange

Citrus trifoliata

Also known as Hardy Orange, Japanese Bitter Orange, Chinese Bitter Orange

Armed with formidable green spines up to five centimeters long, this exceptionally cold-hardy citrus shrugs off freezing winters that would kill other citrus trees. In early spring, fragrant white blossoms emerge on bare, angular green branches just before the three-lobed leaves unfurl. Dense thickets often provide impenetrable cover and nesting sites for songbirds while serving as the primary commercial rootstock across global citrus orchards.

ThornyDeciduousFragrant
Trifoliate Orange reference1 / 7
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAutotrophic (photosynthetic)
Predators
  • Giant Swallowtail Caterpillar
  • Citrus Leafminer
  • White-tailed Deer
ThreatsHabitat clearance in native range; managed as an invasive weed in non-native areas
HabitatsWoodland edges, fencerows, open forests, and riparian corridors
Life span25–50 years
Classification
  1. OrderSapindales
  2. FamilyRutaceae
  3. GenusCitrus
  4. SpeciesCitrus trifoliata
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Wild fruits have toxic look-alikes; never eat based on app identification alone.
Responsible observation
  • Thorn Awareness: Navigate dense shrubs cautiously, as the rigid green spines easily puncture ordinary clothing and footwear.
  • Wildlife Viewing: Search the compound foliage during summer to spot bird-dropping mimic caterpillars of giant swallowtails.
  • Identification: Check for distinctive three-parted leaflets and flattened, bright green twigs that persist through winter.
Related species
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