American Beakgrain

(Diarrhena obovata)

American Beakgrain (Diarrhena obovata)

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Estimated Native Range
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Summary

Diarrhena obovata, commonly known as American Beakgrain, is a deciduous perennial grass native to rich, moist woods and stream banks in the Eastern United States. It typically grows to a height and width of 2-3 feet (0.6-0.9 meters), forming clumps of arching, bright green leaves. The plant produces inconspicuous, beak-like seed heads in late summer to early fall, which are not particularly showy but add a textural element to the garden.

American Beakgrain is valued for its adaptability to shade and its utility as a ground cover in woodland gardens or shaded areas where other grasses may struggle. It is also used for erosion control due to its clumping habit. This grass is relatively low-maintenance, requiring minimal care once established, and is not known to suffer from serious pest or disease problems. It is tolerant of a range of soil types, provided they are consistently moist, and it thrives in part shade to full shade conditions. While not aggressive, it can slowly spread by rhizomes to form a dense ground cover.CC BY-SA 4.0

Plant Description

  • Plant Type: Grass
  • Height: 2-3 feet
  • Width: 2-3 feet
  • Growth Rate: Moderate
  • Flower Color: N/A
  • Flowering Season: Summer, Fall
  • Leaf Retention: Deciduous

Growth Requirements

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

Common Uses

Erosion Control, Groundcover, Low Maintenance

Natural Habitat

Rich, moist woods and stream banks

Other Names

Common Names: Hairy Beakgrain, American Beak-Grass, Obovate Beakgrain, Beakgrass, Ovate Beakgrass, Diarrhène Obovée

Scientific Names: , Diarrhena obovata, Diarrhena americana var. obovata,

GBIF Accepted Name: Diarrhena obovata (Gleason) Brandenburg