Phenology Walk – Florida Fiddlewood

Florida Fiddlewood (Citharexylum spinosum)

Family: Verbenaceae
Origin: Native to the Caribbean and parts of Central America
Garden location: 17° 42′ 55.02″ N, 64° 49′ 45.37″ W (Front 9)
ArbNet Level II list: Yes
POWO Status: Shrub or Tree
IUCN Red List threat level: Least Concern

GPS Location: 17° 42′ 55.02″ N, 64° 49′ 45.37″ W

What to watch for (Phenology)

Leaves

  • Leaf flush: Periodic through the year, often following rainfall
  • Leaf drop: Evergreen to semi-evergreen; light thinning in prolonged dry periods
  • Notes: Leaves glossy, leathery, and often aromatic when crushed

Flowers

  • Buds: Form in long, elegant terminal spikes
  • First bloom: Often late spring into summer
  • Peak bloom: Early wet season
  • End of bloom: Moderate duration; flowers open progressively along the spike
  • Pollinators observed: Bees, butterflies, and other nectar-seeking insects

Fruit / seed

  • Fruit set: After flowering
  • Ripening: Summer into fall
  • Dispersal: Birds and wildlife
  • Notes: Small dark berries persist on branches and provide an important food source

Weather sensitivity

  • Rain-triggered? Yes — flowering and new growth often increase after rainfall
  • Drought response: Moderate tolerance; growth slows but foliage often retained
  • Other notes: Performs well in dry forest margins, secondary woodland, and cultivated settings

Why this plant matters

Citharexylum spinosum is one of the most elegant native flowering trees of the Caribbean, prized for its long, cascading flower spikes and steady production of wildlife-friendly fruit. Phenologically, it represents a balanced rhythm — neither strongly deciduous nor fully static — offering a graceful middle ground between drought-reactive dry-forest species and evergreen steadies.

Its extended bloom sequence makes it an excellent teaching species for progressive flowering, where the spike opens over time rather than all at once.

Cultural and historical significance

Cultural uses

  • Ornamental and avenue tree: Planted for fragrance, floral display, and graceful form
  • Timber: Wood historically used for fine furniture and musical instruments (the name Fiddlewood reflects this)
  • Wildlife value: Fruits support birds and urban fauna
  • Fragrance: Flowers are often noted for a light, sweet scent

St. Croix / Caribbean notes

  • Native to the Virgin Islands and part of dry forest edges, coastal woodland, and village landscapes
  • Likely present in both natural habitats and estate-era ornamental plantings
  • Represents a bridge between native ecology and cultivated Caribbean garden aesthetics
  • A strong candidate for native ornamental and restoration plantings

My observations

  • First observed in project: (date)
  • Notable moments:
    • (YYYY-MM-DD) — Peak flowering with full spike development
    • (YYYY-MM-DD) — Heavy berry set attracting birds
  • Questions / uncertainties:
    • Year-to-year consistency of flowering intensity
    • Duration of berry persistence across seasons

Photos

  • Whole tree / canopy
  • Leaves (texture and sheen)
  • Flower spikes (buds → partial bloom → full bloom)
  • Fruit clusters (immature and ripe)
  • Bark and branching
  • Repeated phenology images from the same vantage point over time

Why this one strengthens your 100-plant set

  • Adds a native Caribbean ornamental with strong aesthetic appeal
  • Demonstrates progressive flowering phenology — a distinct pattern from mass bloomers
  • Bridges wild ecology, estate history, and garden design
  • Pairs beautifully with Andira inermis, Piscidia carthagenensis, and Erythrina eggersii as a showy but native flowering tree

Medicinal Uses

Citharexylum spinosum, or Fiddlewood, is used in traditional Caribbean and folk medicine for fevers, pain (arthritis, rheumatism), digestive issues (diarrhea, indigestion, dysentery), respiratory problems (coughs), menstrual issues (dysmenorrhea), wound healing, and as a diuretic, with its bark and leaves containing compounds like flavonoids and iridoids showing potential antimicrobial, antioxidant, anti-inflammatory, and antidiabetic properties in scientific studies, though more research is needed for validation. 

Traditional Uses

  • Fever & Pain: Bark and leaves used as antipyretic (fever reducer) and for headaches, muscle aches, and inflammation (arthritis, rheumatism).
  • Digestive Health: Bark/leaf infusions for diarrhea, indigestion, dysentery, and constipation.
  • Respiratory: For coughs and other respiratory conditions.
  • Wound Care: To promote healing and prevent infection.
  • Women’s Health: To treat dysmenorrhea (painful periods) and menstrual irregularities.
  • Other: Diuretic, treatment for liver disorders, and in poultices with other plants for sores. 

Scientific Findings (Potential Properties)

  • Antioxidant: Extracts show significant antioxidant activity, potentially protecting kidneys (nephroprotective).
  • Antimicrobial: Extracts exhibit antibacterial and antifungal activity against various bacteria (like E. coli) and fungi.
  • Anti-inflammatory: Shows anti-inflammatory effects, suggesting benefits for conditions like arthritis.
  • Antidiabetic: Compounds found in the plant show promise for inhibiting enzymes related to diabetes.
  • Cytotoxic: Extracts have shown potential against cancer cell lines in vitro. 

Important Note

While traditional use and preliminary scientific studies suggest potential benefits, more rigorous clinical research is necessary to confirm the safety and effectiveness of Citharexylum spinosum for medicinal use.

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