Chasmanthium latifolium (Michaux) Yates. Common name: River Oats, Fish-on-a-Stringer, 'Inland Sea Oats'. Phenology: Jun-Oct. Habitat: Riverbanks, streambanks, bottomland forests, seepages and glades over mafic or calcareous rock, usually in nutrient-rich soils, also now cultivated widely as a native plant ornamental, but can be quite aggressive. Distribution: NJ, OH, IL, and KS south to ne. and Panhandle FL and TX.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, C, Can, ETx1, FlGr, FNA25, GW1, Il, K4, Mi, Mo1, NcTx, NS, Pa, POWO, Tn, Tx, Va, W, WH3, Yates (1966a), Yates (1966c); = Uniola latifolia Michx. — G, HC, RAB, S, S13, Tat, WV. Basionym: Uniola latifolia Michx. 1803
Links to other floras: = Chasmanthium latifolium - FNA25
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC
- Eastern Mountains and Piedmont: FACU
- Great Plains: FACU
- Midwest: FACW
- Northcentral & Northeast: FACW
Heliophily ⓘ: 5
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Horticultural Information
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Height: 2-4 ft.
plant sale text: This southeastern native ornamental grass is easy to grow and can be grown in any garden. River-oats is very tolerant of shade and various soil types. Handsome seed heads appear in the fall and are prized for flower arrangements. River-oats seeds in vigorously, creating many seedlings unless its seed heads are removed before the seeds drop. 1994 N.C. Wildflower of the Year. The Chasmanthium genus supports up to 7 lepidoptera species.
bloom table text: Native to streambanks and moist woods in the eastern half of the country, river-oats is the ideal plant to provide grassy texture in a shady spot where few grasses will grow. This species, also called inland sea-oats, offers handsome, waist-high foliage and is easy to grow in shade or (with adequate moisture) sun, but its real attraction is the gracefully arching stems with many pendulous seedheads. Fully formed by midsummer, the seedheads turn a rich golden-tan in the fall and are useful for flower arrangements. In fact, it is a good idea to remove the seedheads before they ripen to prevent heavy self-sowing into the garden. 1994 N.C. Wildflower of the Year. The Chasmanthium genus supports up to 7 lepidoptera species.
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germination code: 1
native range: eastern & central U.S.
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