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Panicum dichotomiflorum Michaux var. puritanorum Svenson. Section: Dichotomiflora. Puritan Panicgrass. Phen: Jul-Oct. Hab: Wet sands and peats of seasonally exposed pond and lake shores. Dist: NS, NH, and NY south to DE (Sorrie & LeBlond 2008), VA, NC, and e. SC (Bradley et al. [in prep.]); disjunct in IN and IL.

Origin/Endemic status: Native

Taxonomy Comments: Plants from DE northward typically have slender culms 0.3-6 dm long and leaves 1-8 mm wide. Plants with floral characters of var. puritanorum but with nominate-like stout culms 0.8-2 m long and leaves 7-25 mm wide occur in bottomlands in se. VA, and have been recognized as P. dichotomiflorum var. imperiorum Fernald. For the time being they are placed here based on floral characters (they will key here), but need further study.

Synonymy: = G, Il, K1, K3, K4, NE; = n/a – RAB; = Panicum dichotomiflorum Michx. ssp. puritanorum (Svenson) Freckmann & Lelong – FNA25, NY; < Panicum dichotomiflorum Michx. – C, Pa, Tat; < Panicum dichotomiflorum Michx. ssp. dichotomiflorum – Zuloaga & Aliscioni (2023), Zuloaga (2022); < Panicum dichotomiflorum Michx. var. dichotomiflorum – Va; > Panicum dichotomiflorum Michx. var. imperiorum Fernald – F, HC; > Panicum dichotomiflorum Michx. var. puritanorum Svenson – F, HC

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
  • Great Plains: FAC (taxonomic split from wetland indicator species)
  • Midwest: FACW (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ?: 8

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image of plant© margaretcurtin, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© margaretcurtin, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© margaretcurtin, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷

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