Amphicarpum amphicarpon
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{{Speciesbox
| image = Amphicarpum_amphicarpon.jpg
| taxon = Amphicarpum amphicarpon
| authority = (Pursh) Nash
| synonyms = *Amphicarpum purshii
}}{{Short description|Species of plant}}
Amphicarpum amphicarpon, commonly known as peanut grass or Pursh's blue maidencane, is an annual wetland species found in the eastern United States. Its common name honours botanist Frederick Traugott Pursh.{{Cite web |title=Amphicarpum amphicarpon (Blue Maidencane, Hairy Maidencane, New Jersey Goober-grass, Peanut Grass, Pine-barrens Goobergrass, Pine-barrens Peanut Grass, Pursh's Blue Maidencane) {{!}} North Carolina Extension Gardener Plant Toolbox |url=https://plants.ces.ncsu.edu/plants/amphicarpum-amphicarpon/ |access-date=2025-01-07 |website=plants.ces.ncsu.edu}} It was previously considered to be part of the genus Milium.{{Cite web |title=Peanut Grass Guide - New York Natural Heritage Program |url=https://guides.nynhp.org/peanut-grass/ |access-date=2025-01-07 |website=guides.nynhp.org}}
Distribution
It is found along the coastal areas from New Jersey to Georgia. It was previously found within New York state but is now considered possibly extirpated. A single population was discovered on Nantucket in 1988, 240 miles north of its previously known northernmost site.{{Cite web |title=Amphicarpum amphicarpon (Pursh's blue maidencane): Go Botany |url=https://gobotany.nativeplanttrust.org/species/amphicarpum/amphicarpon/ |access-date=2025-01-07 |website=gobotany.nativeplanttrust.org}}
Description
Amphicarpum amphicarpon grows {{convert|1|to|2|ft|m}} tall. Its stems and leaves are bristly and hairy; the leaves ascend.{{Cite web |title=Vascular Plants of North Carolina |url=https://auth1.dpr.ncparks.gov/flora/species_account.php?id=3658 |access-date=2025-01-07 |website=auth1.dpr.ncparks.gov}}
The plant produces subterranean fruits early in the growing season, which are self-fertilizing (cleistogamous).{{cite web|url=https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&taxonid=64007|title=Amphicarpum Kunth|website=Flora of the Southeastern United States|year=2025|access-date=5 May 2025|publisher=University of North Carolina Herbarium, North Carolina Biological Garden|location=Chapel Hill, North Carolina|last1=Weakley|first1=A.S.|last2=((Southeastern Flora Team))}} Later, it produces aerial fruits. It flowers and fruits between August and October.
References
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Category:Endemic flora of the United States
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