Sullivant'S Coolwort

sullivantia sullivantii

Sullivant's Coolwort (Sullivantia sullivantii) is a rare and delicate perennial herb, a true gem of the North American flora. This small plant is a specialized inhabitant of cool, moist, shaded rock crevices, particularly sandstone and limestone cliffs. It is highly valued by botanists and nature enthusiasts for its unique habitat requirements and its status as a relict species, providing a living link to ancient ecological conditions. Its presence often indicates a pristine and stable microclimate, making it an ecological indicator species.

Habitat: Sullivant's Coolwort is typically found clinging to moist, shaded, often north-facing sandstone or limestone cliffs, rock shelters, and ledges, frequently in association with seeping water or spray from waterfalls.

Appearance

This charming plant features a basal rosette of bright green, kidney-shaped to nearly round leaves, which are often somewhat fleshy and have shallowly lobed or toothed margins. From this rosette, slender, reddish-tinged stems emerge, reaching heights of 10 to 30 centimeters. Each stem culminates in a loose, open cluster of small, star-like white flowers, typically five-petaled, often with a hint of pink or purple on the stamens, creating a delicate, airy appearance. The flowers are approximately 5-8 mm across.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderSaxifragalesFamilySaxifragaceaeGenusSullivantia

Sullivant'S Coolwort

Interesting facts

It is considered a relict species, meaning it persisted in specific refugia during past climatic changes, especially glaciation.

Many of its populations are small and isolated, making them particularly vulnerable to environmental disturbances.

Sullivant's Coolwort is named after William Starling Sullivant (1803-1879), a prominent American botanist who discovered it in Ohio.

The common name 'Coolwort' directly refers to its preference for cool, moist environments, often found in the spray zones of waterfalls.

Special abilities

This species possesses a specialized ability to root and thrive exclusively within narrow rock crevices, utilizing the stable temperatures and moisture conditions found there.

Sullivant's Coolwort is highly dependent on consistent moisture from seeping water on cliff faces, having developed adaptations to efficiently absorb and retain water in these environments.

It is well-adapted to low light conditions, flourishing in the deep shade provided by rock overhangs and dense forest canopies typical of its cliff habitats.

Measurements & details

Length: 10-30 cm
Lifespan: 3-10 years

Diet & Feeding

As a photosynthetic plant, Sullivant's Coolwort produces its own food by converting light energy into chemical energy. It absorbs carbon dioxide from the air and water and nutrients from the soil through its root system.

Primary Foods

Sunlight
Carbon Dioxide
Water
Nitrogen (from soil)
Phosphorus (from soil)
Potassium (from soil)

Foraging Method

Absorption

Ecological connections

mutualism

Small Native Bee

Andrena spp.

Pollinator, contributing to the plant's reproduction.

eaten by

Garden Snail

Cornu aspersum

Herbivore, consuming plant foliage, though less common in cliff habitats.

coexistence

Marginal Wood Fern

Dryopteris marginalis

Co-occurs in similar moist, shaded microhabitats on cliffs.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Sullivant'S Coolwort?

The easiest way to identify Sullivant'S Coolwort is to use the Snappit nature identifier app.

How long is Sullivant'S Coolwort?

10-30 cm

How long does Sullivant'S Coolwort live?

3-10 years

What does Sullivant'S Coolwort eat?

Where is Sullivant'S Coolwort usually found?

Sullivant's Coolwort is typically found clinging to moist, shaded, often north-facing sandstone or limestone cliffs, rock shelters, and ledges, frequently in association with seeping water or spray from waterfalls.

How does Sullivant'S Coolwort hunt?

Absorption