Tridens flavus

Common Name
Purpletop
Tall redtop
Grease grass
Redtop
Plant Form
Grasses, Sedges & Rushes
Duration
Perennial
Max Height (ft)
5.0
Width (ft)
3.0
Region
Coastal
Piedmont
Mountain
Hardiness Zone
5, 6, 7, 8, 9
Commercially available
Yes

Photographer: violetnettle
Licensed under: CC BY-NC 4.0
Original photo: Original photo

Photographer: violetnettle
Licensed under: CC BY-NC 4.0
Original photo: Original photo

Additional Info

Habitat: Fields, pastures, roadsides, clearings, and other open, disturbed habitats; also scattered in varied natural woodlands and barrens. Common throughout Virginia.

Wildlife Value: Seed heads are a food source for birds and mammals. This is a larval host plant that supports various skipper larvae and Common Wood-Nymph (Cercyonis pegala). Adult Common Wood-Nymph butterflies feed on rotting plant matter. This species is also the larval host of a number of butterflies and moths, including Crossline Skipper (Polites origenes), Little Glassywing (Pompeius verna), and Broad-winged Skipper (Poanes viator). It provides excellent cover year-round.

Notes: Has attractive reddish-purple seed heads that appear in the late summer and persist into fall and are especially impactful when planted en masse. 

Flower Color
Brown
Cream/White
Gold/Yellow
Purple/lavender
Flower Prominence
Conspicuous
Bloom Time
Late Summer
Fall
Bloom Month
July
August
September
October
Light Requirements
Full sun
Partial sun
Moisture Requirements
Moist
Dry
Soil Texture
Clay
High organic matter
Deer Resitant
Yes
Seed or Fruit eaten by wildlife?
Yes
Pollinators
Hummingbirds
Tolerates
Earth Sangha Inventory

Founded in 1997, the Earth Sangha is a nonprofit public charity based in the Washington, DC, region. The Wild Plant Nursery is the most comprehensive source of local-ecotype, native plants in the Washington DC region, and the region’s only facility dedicated exclusively to this type of propagation. “Local-ecotype” plants are propagated from local, wild, naturally-occurring populations and are well-adapted to local conditions and for wildlife species that depend on the local forms, such as pollinators. Inventory is updated on a weekly basis so number may not be accurate.

Pots Available Plugs Available Location Notes
0 0 Row D

Reserved for conservation projects

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