Poteridium annuum
Ann. Sci. Nat., Bot., sér. 3, 5: 43. 1846.
Common names: Prairie burnet
EndemicIllustrated
Basionym: Poterium annuum Nuttall in W. J. Hooker, Fl. Bor.-Amer. 1: 198. 1832
Synonyms: Sanguisorba annua (Nuttall) Nuttall
Treatment appears in FNA Volume 9. Treatment on page 320.
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.
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
Distribution
Ont., Ark., Iowa, Kans., N.Y., Okla., S.C., Tex.
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.
Selected References
None.
Lower Taxa
None.
"thin" is not a number.
... more about "Poteridium annuum"
perigynous +
dehiscent +
herbaceous +
coriaceous +
absent +
absent +
glabrous +
Prairie burnet +
aggregated +
absent +
glabrous +
aggregated +
glabrous +
globose +
fascicles +
Sandy and rocky soil, prairies, oak savannas, oak woodlands, disturbed areas (pastures, roadsides), often locally moister sites +
extended +
armed +
persistent +
glabrous +
enlarged +
hardened +
Present +
12-100+-flowered +
crassinucellate +
compound +
alternate +
deciduous +
simple +
persistent +
adnate +
pinnatisect +
scarious +
absent +
aggregated +
apical +
absent +
absent +
perigynous +
absent +
absent +
1;250 +
Ann. Sci. Nat., Bot., sér. +
1846 +
not arillate +
2;1 +
persistent +
ovate +
tuberculose-thickened +
equal +
branched +
pubescent;glabrous +
capitate +
pinnate +
persistent +
adnate +
absent +
branched +
brushlike +
deciduous +
distinct +
terminal +
not elongate +
Poteridium annuum +
Poteridium +
species +
developed +
absent +
inconspicuous +
taprooted +
glabrous +
thin +