cardinal flower
Lobelia cardinalis
A torch of brilliant crimson in the damp wild, the cardinal flower is nature's premiere hummingbird lure. This stunning wetland native offers a masterclass in architectural beauty and specialized pollination.
Quick Identification
Size
Stands 60–120 cm (2–4 ft) tall with a spread of 30–60 cm (1–2 ft)
Colors
Brilliant, intense 'cardinal' red blossoms; deep green lance-shaped foliage; stems are often a purplish-green
Key Features
- Tall, unbranched spikes of vivid red tubular flowers
- Two-lipped blossoms with three lower lobes and two upper lobes
- Lance-shaped, finely-toothed leaves 10-20 cm long
- Exudes a milky sap when stems or leaves are broken
When You’ll See Them
Geographic range
Where Does the cardinal flower Live?
Native to the Americas, the cardinal flower boasts an impressive geographic footprint that begins in southeastern Canada and stretches across the eastern and southwestern United States. It is a common sight in the wetlands of the Midwest and South, extending its reach through Mexico and Central America before touching the northern reaches of Colombia in South America.
Basemap © OpenStreetMap contributors
Behavior
The cardinal flower is a short-lived perennial that is famous for its specialized relationship with the Ruby-throated Hummingbird. Because the flowers have long, narrow tubes, most insects find it difficult to reach the nectar. This makes the cardinal flower almost entirely dependent on hummingbirds for pollination; as the bird reaches deep into the flower for food, the plant’s reproductive organs brush against the bird's head, transferring pollen from one plant to the next.
While it is a perennial, individual plants often only live for a few years. However, they successfully perpetuate themselves by forming new offsets or 'pups' at the base of the parent plant and by shedding numerous tiny seeds. In a garden setting, they are non-aggressive but will thrive and multiply if provided with the wet, organic-rich soil they crave.
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Camera Tips
To capture the cardinal flower's true brilliance, positioning is everything. Because these plants grow quite tall, set your camera on a tripod or mount it approximately 3 to 4 feet off the ground. Aim for a slightly downward angle or a straight-on profile to showcase the architectural spike of the blooms. If you are using an AI-powered camera to capture wildlife, the cardinal flower is the ultimate 'hummingbird magnet.' Set your trigger sensitivity to high and focus on a specific cluster of open blossoms.
Lighting is your biggest challenge with such a saturated red. Direct midday sun can 'blow out' the red channel on digital sensors, making the flower look like a shapeless crimson blob. For the best results, use a camera that allows for slight underexposure, or aim to capture images during the 'Golden Hour' (shortly after sunrise or before sunset). The soft, directional light will bring out the velvety texture of the petals and the deep veins in the green leaves.
If you are using a trail camera to monitor visitors, place it within 5 to 10 feet of a large stand of flowers. Unlike mammals, hummingbirds move incredibly fast; ensure your camera is set to 'Burst Mode' or high-speed video. Because cardinal flowers thrive in wet soil, ensure your camera housing is moisture-resistant and the mount is stable, as damp ground can cause traditional stakes to lean over time.
Similar Species
Species that look similar or are commonly confused with cardinal flower.
Frequently Asked Questions
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