Flora of North America species comparison

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Poteridium annuum

annual burnet, prairie burnet, western burnet
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
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
from FNA
AR; IA; KS; NY; OK; SC; TX; ON
[WildflowerSearch map]
[BONAP county map]
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
P. occidentale
Synonyms Poterium annuum, Sanguisorba annua
Name authority (Nuttall) Spach: Ann. Sci. Nat., Bot., sér. 3, 5: 43. (1846)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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