Poteridium annuum |
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annual burnet, prairie burnet, western burnet |
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Habit | Plants winter-annual or biennial, glabrous; taproots 1–4(–6) dm. |
Stamens | (2 or)4. |
Fruits | hypanthia ridges extended into thin wings, 0.5 mm wide; sepals tuberculose-thickened proximally. |
Poteridium annuum |
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Phenology | Flowering Mar–Jun; fruiting Apr–Jul. |
Habitat | Sandy and rocky soil, prairies, oak savannas, oak woodlands, disturbed areas (pastures, roadsides), often locally moister sites |
Elevation | 0–500 m (0–1600 ft) |
Distribution |
AR; IA; KS; NY; OK; SC; TX; ON
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Discussion | The eastern records (Ontario, Iowa, Massachusetts, New York, and South Carolina) all appear to represent adventives or non-persistent waifs. A record from Maryland (J. B. S. Norton and R. G. Brown 1946) is plausible; no specimen is known to the author. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 320. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Agrimonieae > Poteridium |
Sibling taxa | |
Synonyms | Poterium annuum, Sanguisorba annua |
Name authority | (Nuttall) Spach: Ann. Sci. Nat., Bot., sér. 3, 5: 43. (1846) |
Web links |