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Proboscidea louisianica

Proboscidea louisianica
Unicorn plant, Ram's horn, Devil's claw, Proboscis flower, Elephant tusk

4,4/5
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Quick and in line with my expectations.

Serge N., 24/08/2018

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More information

A fragrant herbaceous annual with an orchid-like appearance. It boasts an unusual fruiting structure shaped like a claw.
Flower size
5 cm
Height at maturity
60 cm
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
21 days
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Sowing period March to May
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Flowering time July to September
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Description

Proboscidea louisianica is an herbaceous annual with the appearance of an orchid and a strong fragrance. Its claw-shaped fruit is what gave it its common name of devil's claw.


Proboscidea louisianica is a member of the Pedaliaceae family. It is native to the southern United States and Mexico. It is particularly found in Louisiana. The orchid-like flower consists of 5 fused and irregular petals forming a trumpet with undulating edges. It blooms from July to September. Both the calyx and leaves are hairy. The highly fragrant flowers measure 5cm (2in) in diameter and are white with pinkish-purple to violet spots. The throat is often speckled with purple.


The fruit is what draws the eye, and is the reason this plant has so many unique nicknames! The fruits form a double, strongly curved claw. When still green, they can be pickled and consumed. Once dried, they take on a characteristic hooked or claw-like appearance. These dehiscent capsules tend to cling to anything that brushes against them, dispersing their seeds far and wide.

The devil's claw is a highly branched spreading annual herbaceous plant. It reaches a height of 50 to 60cm (20 to 24in). It grows very rapidly under favourable conditions. Its foliage is rather heart-shaped and very hairy.

The devil's claw prefers sheltered locations that are warm and sunny. It thrives in light, organic-rich soils. It will look stunning in pots, or as a standalone plant to fully appreciate its flowering from July to September... and of course, its spectacular fruiting.

Flowering

Flower colour white
Flowering time July to September
Inflorescence Solitary
Flower size 5 cm
Fragrance Very fragrant
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour medium green

Plant habit

Height at maturity 60 cm
Spread at maturity 40 cm
Growth rate fast

Botanical data

Genus

Proboscidea

Species

louisianica

Family

Martyniacée

Other common names

Unicorn plant, Ram's horn, Devil's claw, Proboscis flower, Elephant tusk

Origin

North America

Planting and care

It prefers light soils, rich in organic matter. Sow in a warm greenhouse at 21°C (69.8°F). Cover the seeds with 1cm of soil. Germination takes about 21 days. Transplant in June when the soil is warmed up.

Sowing period

Sowing period March to May
Germination time (days) 21 days

Intended location

Suitable for Meadow
Type of use Free-standing, Container, Climbing
Ease of cultivation Experienced
Exposure Sun
Soil pH Any
Soil moisture Dry soil, Moist soil
4,4/5

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