Bartonia verna

Species

White Screwstem

Bartonia verna

White Screwstem is a perennial herb native to eastern North American wetlands, known for its unique spiral stems and delicate white flowers.

Also known as: White Screwstem

Bartonia verna, commonly known as White Screwstem, is a perennial herbaceous plant native to the wetlands of eastern North America, particularly found in areas such as marshes, wet meadows, and along the edges of ponds. This species typically grows to a height of 12 to 30 inches, exhibiting a unique growth habit characterized by its slender, upright stems that twist in a spiral, giving rise to its common name. The leaves are narrow and linear, often appearing whorled around the stem, and are generally green to yellow-green in color, providing a striking contrast to the plant’s delicate white flowers.
The flowers of Bartonia verna are small, tubular, and arranged in clusters at the top of the stems, blooming from late spring to early summer. They are primarily pollinated by insects, contributing to the plant’s ecological role as a nectar source. The fruit is a capsule that contains small seeds, which are dispersed by water, aiding in the plant’s propagation in its native wetland habitats. White Screwstem has adapted to its environment by developing a tolerance for saturated soils, making it an important species in maintaining the health of wetland ecosystems. While not widely used by humans, it can be appreciated for its ornamental value in native plant gardens and its role in supporting local biodiversity.

Care Guide

🌱 Hardiness Zone
Zone 4–8
🪨 Soil
Wet, well-draining, loamy to sandy
☀️ Light
Full sun to partial shade
💧 Water
Moderate, prefers consistently moist soil
🌿 Fertilization
Minimal, if any; natural wetland conditions are sufficient

Plant images courtesy of Wikimedia Commons — a free media repository maintained by volunteers worldwide. Thank you — please consider donating ♥

Browse This Plant's Classification

Domain Eukaryota
Kingdom Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Gentianales
Family Gentianaceae
Genus Bartonia
Species Bartonia verna

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