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sixweeks threeawn
Scientific Name: Aristida adscensionis
Family: Poaceae
Category: Monocot
Growth: Graminoid
Duration: Annual
Other Names:
Six-weeks Three-awn Grass (Aristida adscensionis)
Aristida adscensionis, commonly known as Six-weeks Three-awn, is a species of grass with a wide distribution.
Taxonomy and Nomenclature
- Scientific Name: Aristida adscensionis L.
- Common Name: Six-weeks Three-awn
- Family: Poaceae (Grass Family)
- Kingdom: Plantae
- Synonym: Aristida adscensionis f. modestina Hack.
Distribution and Habitat
- Native to the Americas.
- Distributed nearly worldwide.
- Also found in Texas and other states.
Morphological Characteristics
- Annual grass, normally delicate.
- Can reach up to 50 cm tall under exceptional soil and water conditions.
- Several stems arise from the base.
- Unbranched above, spreading to ascending.
- Fibrous-rooted, cespitose (growing in tufts).
- One-flowered spikelets with three awns in a panicle.
- Glumes unequal, 1-veined, acuminate (tapering to a point). Lower glumes 4-8 mm, upper glumes 6-11 mm.
- Calluses 0.5-0.8 mm.
- Lemmas 6-9 mm, slightly keeled, midveins scabrous (rough).
Ecological Role
- Considered an opportunistic species.
Further Information
- Discover Life offers information about the biology, natural history, ecology, identification, and distribution of Aristida adscensionis.
- Garden Guides provides plant information, identification details, uses, and gardening tips.
- USDA resources are available.