Flora of the Southeastern United States

Anatherum hirsutius (Hackel) Weakley & LeBlond. Common name: Hairy Bluestem. Phenology: Sep-Nov. Habitat: Wet pine savannas, pine flatwoods, adjacent ditches, seepage over rock outcrops (in the upper Piedmont), other wet disturbed sites. Distribution: E. Maryland south to c. peninsular Florida, west to se. Louisiana. Material west of the Mississippi River appears to be of this taxon, but needs additional study. Discovered in seepage in the upper Piedmont of South Carolina (R. Schiller, pers.comm., 2025), growing with other flora of Coastal Plain affinity.

Origin/Endemic status: Endemic

Taxonomy Comments: See discussion in Weakley et al. (2011) for the reasons for recognition of this taxon at specific rank.

Synonymy ⓘ: = Weakley et al (2024b) in Weakley et al (2024a); = Andropogon glomeratus (Walter) Britton, Sterns, & Poggenb. var. hirsutior (Hack.) C.Mohr — FNA25, K1, NS, Va, WH3, Campbell (1983); = Andropogon hirsutior (Hack.) Weakley & LeBlond — FlGr, K4, POWO, Sorrie (2020b) in Weakley et al (2020), Weakley et al (2011); = Andropogon virginicus L. var. hirsutior (Hack.) Hitchc. — Tx; < Andropogon glomeratus (Walter) Britton, Sterns, & Poggenb. — ETx1, HC, S, Tn; >< Andropogon glomeratus (Walter) Britton, Sterns, & Poggenb. var. glomeratus — S13; < Andropogon hirsutior (Hack.) Weakley & LeBlond — F, Tat; < Andropogon virginicus L. — RAB; < Andropogon virginicus L. var. abbreviatus (Hack.) Fernald & Griscom — C; ? Andropogon virginicus L. var. glaucopsis (Elliott) Hitchc. — G, misapplied. Basionym: Andropogon macrourus Michx. var. hirsutior Hackel 1889

Links to other floras: = Andropogon glomeratus var. hirsutior - FNA25

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACW
• Eastern Mountains and Piedmont: FACW
• Great Plains: FACW
• Northcentral & Northeast: FACW

Heliophily ⓘ: 9