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Example(s): Example sentences from FNA :  lateral sepals included, dark brown, strongly curved, 4--7 mm, keel firm, ciliate, petals unfolding in morning, blade obovate, 10 mm;  Culms 1.5–3 times as wide as thick, 20–100 cm × 0.35–2 mm, firm to hard, wiry, with to 8 subacute ribs, rarely nearly smooth;
- Categorical Glossary for the Flora of North America Project, by Robert W. Kiger and Duncan M. Porter. 2001. Hunt Institute for Botanical Documentation.