# 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. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 3 - **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. ![Sullivant's Coolwort](https://inaturalist-open-data.s3.amazonaws.com/photos/223623540/medium.jpg) Photo: Ken-ichi Ueda, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/223623540) ## 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. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Saxifragales - **Family:** Saxifragaceae - **Genus:** Sullivantia ## 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 - **Chasmo-endemic Adaptation:** This species possesses a specialized ability to root and thrive exclusively within narrow rock crevices, utilizing the stable temperatures and moisture conditions found there. - **Moisture Seepage Reliance:** 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. - **Shade Tolerance:** 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](https://www.snappit.app/explore/garden-snail) (*Cornu aspersum*) — Herbivore, consuming plant foliage, though less common in cliff habitats. - **Coexistence:** [Marginal Wood Fern](https://www.snappit.app/explore/marginal-wood-fern) (*Dryopteris marginalis*) — Co-occurs in similar moist, shaded microhabitats on cliffs. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Sullivant's Coolwort? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### 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? 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. ### 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 ## Where to spot - [Bixby State Preserve](https://www.snappit.app/guides/places/bixby-state-preserve) — Iowa, US · Nature Reserve ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Sullivant's Coolwort: Facts & Places to See — Snappit](https://www.snappit.app/explore/sullivants-coolwort)