SafePlants

Aristida tuberculosa: Seaside Threeawn

Aristida tuberculosa, commonly known as Seaside Threeawn, is an annual grass found in specific habitats. This plant belongs to the grass family (Poaceae).

Considerations for Pets

• This plant has seeds that are long.

Taxonomy and Nomenclature

• Scientific Name: Aristida tuberculosa Nutt.
• Family: Poaceae (Grass Family)
• Synonyms: Aristida tuberculosa (s.)
• Common Names: Seaside Threeawn, Beach Threeawn, Dune Threeawn Grass

Distribution and Habitat

• Seaside Threeawn is native to coastal sand dunes, particularly in New England.
• It is also found in the southern third of Alabama and is considered a rare species in Minnesota, where it only grows on active sand dunes.
• It also grows in the pine barrens of New Jersey.

Morphological Characteristics and Growth Habits

• Seaside Threeawn is an annual graminoid, meaning it completes its life cycle in one year.
• The culms (stems) typically range from (25)40-100 cm in height, growing erect or ascending near the base, and are highly branched above.
• It has notably unusual awns that are loosely twisted around one another.

Quirky Facts

• The unique shape of the seed of Seaside Threeawn is notable in the pine barrens of New Jersey.

Interactions with Other Organisms

• It is mentioned in the context of midwestern outliers of Atlantic Coastal Plain plants, suggesting its presence and role in specific plant communities.

Further Information

• Dave's Garden: A community for sharing gardening tips and plant information.
• Garden Guides: Provides information on gardening and the Seaside Threeawn.
• Discover Life: Offers details about the biology, natural history, ecology, identification, and distribution of Aristida tuberculosa.
• New York City Department of Parks.
• Brooklyn Botanic Garden New York Metropolitan Flora Project (NYMF)