Slender Rush

(Juncus tenuis)

Slender Rush (Juncus tenuis)

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Estimated Native Range
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Summary

Juncus tenuis, commonly known as Slender Rush, is a semi-deciduous perennial herb native to a variety of habitats including open woodlands, grasslands, and especially riparian zones across North America. It typically grows between 15 and 60 cm tall. The plant features basal leaves that are shorter than the slender, erect stems. The stems are adorned with sheaths and topped with distinctive clusters or cymes, which bear small egg-shaped seed capsules. When mature, the seeds split into three parts. Slender Rush also propagates through its rhizomatous root system.

Slender Rush is valued for its adaptability and is often used for erosion control and wetland restoration due to its ability to thrive in moist conditions. It is also utilized in rain gardens and as a filler in mixed plantings. While it is not commonly sold as a household container plant, it can be found in nurseries specializing in native or wetland plants. In cultivation, it prefers full sun to part shade and can tolerate a wide range of water conditions, from medium to high moisture, and is adaptable to various soil types with varying drainage capabilities. Despite its benefits, Juncus tenuis is potentially invasive outside its native range, and gardeners should consult local regulations before planting.CC BY-SA 4.0

Plant Description

  • Plant Type: Grass
  • Height: 0.5-2 feet
  • Width: 0.5-2 feet
  • Growth Rate: Slow
  • Flower Color: N/A
  • Flowering Season: Spring
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Full Sun, Part Shade
  • Water: Medium, High
  • Drainage: Fast, Medium, Slow

Common Uses

Bird Garden, Deer Resistant, Drought Tolerant, Erosion Control, Low Maintenance, Potted Plant, Street Planting, Water Garden

Natural Habitat

Open woodlands, grasslands, and riparian zones across North America

Other Names

Common Names: Field Rush , Path Rush , Poverty Rush , Slender Yard Rush , Wiregrass , Yard Rush , Tue-Siv , Zarte Binse , Nurmivihvilä , Jonc Grêle

Scientific Names: Juncus tenuis , Juncus tenuis var. tenuis , Juncus macer , Juncus tenuis var. williamsii , Juncus germanorum , Juncus lucidus , Juncus smithii , Juncus tenuis var. multicornis , Juncus tenuis subsp. bicornis , Juncus bicornis

GBIF Accepted Name: Juncus tenuis Willd.