Fan Flower Identification Guide

Key Identifying Features

Fan flower (Scaevola aemula) is instantly recognized by its unusual one-sided flowers: the five petals all fan out to one side of the flower, like a tiny open hand or half a daisy. Most are blue to purple (also white or pink), with a contrasting yellow or white throat, borne on trailing, spreading stems.

• Fan-shaped, one-sided five-petaled flowers (~¾–1 inch)
• Petals spread like a hand or pleated fan
• Blue-purple most common; white and pink forms exist
• Trailing/spreading habit, great for baskets

Leaves & Stems

Leaves are small, narrow to spoon-shaped (spatulate), alternate, slightly fleshy, and sometimes toothed near the tip. They are bright to deep green. Stems are slender, trailing or sprawling, branching freely to form a spreading mat or cascade. The plant rarely grows tall — usually only 6–12 inches high but spreading 2–3 feet wide.

Flowers & Fruit

The flower is the defining feature. Each bloom has five petals all arranged in a fan on the lower half, leaving the upper side open — the result of a split that runs to the top of the flower. The throat is often a contrasting yellow, white, or cream, and the petals may have a fringed or downy texture. Flowers appear singly or in small clusters along the stems and bloom continuously through the warm season. Small fruits follow but are inconspicuous.

How to Tell It Apart from Look-Alikes

• Lobelia: Has small two-lipped blue flowers, but they are not the distinctive even fan of five petals to one side.
• Verbena: Has clustered flat flowers, not one-sided fans.
• Bacopa: Has small star/round flowers, not fan-shaped.
• The one-sided, hand-like fan of five petals is unique to Scaevola and is the single best ID trait.

Where You'll Find It

Fan flower is a heat- and drought-tolerant Australian native popular as a hanging basket, container, and groundcover annual (perennial in frost-free climates). It thrives in full sun, tolerates heat and humidity, and blooms nonstop without deadheading. Look for it spilling over the edges of patio pots and window boxes throughout summer.

Quick ID Checklist

• Fan-shaped, one-sided flowers with five petals on the lower half
• Petals fanned like a hand, often with a contrasting throat
• Mostly blue-purple, also white or pink
• Trailing, spreading low habit
• Blooms all summer without deadheading