Plants Active during the day

Creeping Woodsorrel

Oxalis corniculata

iNaturalist Wikipedia

Often mistaken for clover, the Creeping Woodsorrel is a miniature marvel featuring 'sleeping' leaves and seed pods that explode like tiny cannons.

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Quick Identification

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Size

Height 5-10 cm (2-4 in); creeping stems can spread 30 cm (12 in) or more

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Colors

Bright green to deep burgundy leaves; vibrant yellow five-petaled flowers

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Key Features

Trifoliate heart-shaped leaves
Small yellow flowers with five petals
Prostrate stems that root at nodes
Cylindrical seed capsules that explode when touched

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 9 AM - 4 PM

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Season Spring through Autumn; year-round in frost-free regions

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Diet As a photoautotroph, it creates energy from sunlight via photosynthesis and absorbs water and minerals through its fibrous root system.

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Habitat Suburban gardens, lawns, sidewalk cracks, greenhouses, and disturbed forest edges.

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Where Does the Creeping Woodsorrel Live?

Originally native to Southeast Asia, Creeping Woodsorrel has become one of the most successful cosmopolitan plants in the world. It is now naturalized across almost every continent, with significant populations throughout North America, Europe, Africa, and Oceania. This hardy traveler is particularly common in the United States, Japan, and Australia, where it thrives in human-altered landscapes and temperate to subtropical climates.

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8 Countries

150M km² Range

Least Concern Conservation

CN China IN India US United States JP Japan AU Australia GB United Kingdom BR Brazil ZA South Africa

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iNaturalist / Verified observation data

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Behavior

Creeping Woodsorrel is a highly adaptable herbaceous plant known for its opportunistic growth and fascinating rhythmic movements. One of its most distinctive behaviors is nictinasty, or "sleep movements," where its leaflets fold downward and close up at night or during stressful weather conditions to protect the plant's delicate surfaces. This movement is a response to light intensity and helps the plant conserve moisture and energy.

The species is also famous for its aggressive dispersal strategy known as ballochory. As its seed pods mature, they build up internal pressure; when touched by a passing animal, a raindrop, or even a heavy gust of wind, the pod bursts open. This explosive action can catapult tiny seeds several meters away from the parent plant, allowing it to colonize new garden beds and sidewalk cracks with remarkable speed. It is a social plant in an ecological sense, often forming dense mats that provide micro-habitats for tiny soil invertebrates.

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Camera Tips

To capture the fascinating life of Creeping Woodsorrel, standard motion-triggering won't work; instead, utilize the time-lapse feature on your AI-powered camera. To record the "sleep movements" of the leaves, mount your camera on a low-profile tripod or directly on the ground. Set the interval to take one photo every 5 minutes starting an hour before sunset and continuing until an hour after dusk. When played back, you'll see the heart-shaped leaflets tucking themselves in for the night in a graceful, rhythmic motion.

Because the yellow flowers are small, usually under 10mm wide, a macro lens or a close-focus setting is essential. The flowers are heliotropic, meaning they open in response to bright sunlight and close in the late afternoon or during heavy cloud cover. For the best color saturation, aim to capture the plant between 10 AM and 2 PM on a bright day. If your plant has the dark burgundy leaf mutation (common in many backyards), backlighting it with the low morning sun can make the leaves appear to glow with a deep ruby light.

One of the most exciting challenges is capturing the explosive seed dispersal. This requires high-speed video capabilities. On a dry day, identify a ripe, elongated seed pod—it will look slightly swollen and yellowish-green. Set your camera to its highest frames-per-second (FPS) setting and use a long blade of grass to gently poke the pod. The resulting footage will reveal the incredible speed at which the seeds are launched, a process usually invisible to the naked eye.

Similar Species

Species that look similar or are commonly confused with Creeping Woodsorrel.

White Clover

Clover has oval leaflets often marked with a white 'V', and its flowers are clustered into white globular heads rather than single yellow blooms.

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Frequently Asked Questions

Creeping Woodsorrel is most visually 'active' during the day. Its flowers typically open in the mid-morning sun and close by late afternoon. Additionally, its leaves remain open during the day and fold downward into a 'sleeping' position at night.

You rarely need to attract Creeping Woodsorrel; it often arrives uninvited in the soil of nursery plants or via wind-blown seeds. To encourage it, leave a patch of slightly moist, disturbed soil or a corner of a garden bed unmulched.

Creeping Woodsorrel doesn't eat in the traditional sense; it is a plant that performs photosynthesis. It uses sunlight, water, and carbon dioxide to produce its own food (sugars), while its roots draw nitrogen and other nutrients from the soil.

Yes, they are exceptionally common in suburban areas. They are frequently found in lawns, garden containers, and growing in the narrow cracks of concrete driveways and sidewalks.

While both have three leaflets, Creeping Woodsorrel has distinctly heart-shaped leaves with a central crease, whereas most clovers (Trifolium) have oval or round leaflets. Woodsorrel also has yellow, five-petaled flowers, unlike the pom-pom shaped flower heads of clover.

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