Diarrhena americana
species of plant
Diarrhena americana, also known as American beak grass or American beakgrain, is a native, perennial bunchgrass of North America.
Historically, Diarrhena americana was the only species of beak grass recognized in the United States; however studies have suggested that the known beak grass is to be classified into two distinct species, Diarrhena americana and Diarrhena obovata.
Distribution
Diarrhena americana naturally occurs throughout the Midwestern United States, including in eastern Oklahoma and Missouri; south to Alabama; east to Kentucky, the Appalachian Mountains and northern Maryland; and north to southern Illinois, Indiana, Ohio, and southern Michigan.
The grass plant lives in rich cove forests and woodlands, preferring to grow in the moist soils of shaded ledges and riverbanks. It grows in rich, moist woodlands from Missouri to Maryland and south to Oklahoma and Alabama.
Description
Diarrhena americana is a bunchgrass that grows in 2–3 feet (0.61–0.91 m) tall clumps. It has bright green leaf blades, that can grow up to 0.75 inches (1.9 cm) in width.
These perennial plants can grow flowers that grow above the foliage, with 3 inch tall floral spikes, during the early to mid-summer. The culms range from 60–131 cm (24–52 in) high.
By late summer the flowers turn into hard, brown seed heads.
Begin with the source’s own compact description: “Diarrhena americana” is species of plant. The dossier treats that line as a proposition to test through Diarrhena, americana and species, not as a finished interpretation.
Why this record matters
The phrase “species of plant” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Dec 15, 2023. The linked authority identifier is Q5271953. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Diarrhena americana” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.