Parietaria pensylvanica Muhlenberg ex Willdenow. Pennsylvania Pellitory, Rock Pellitory. Phen: Apr-Oct; May-Oct. Hab: In circumneutral soils, such as in thin soils at the bases of calcareous or subcalcareous cliffs or on calcareous shale barrens, rich floodplain soils. Dist: ME west to BC, south to e. NC, w. NC, SC (Gaddy 2014), AL, Panhandle FL, TX, NV, and Mexico (many states).

Origin/Endemic status: Native

Taxonomy Comments: Two varieties (or species) are sometimes delimited (see synonymy): var. pensylvanica, eastern and northern, and var. obtusa (Rydberg ex Small) Shinners, southwestern. This treatment is quite credible, and needs additional assessment.

Synonymy: = Ar, C, FNA3, G, GrPl, GW2, Il, K1, K3, K4, Mex, Mi, NE, NY, Pa, RAB, S, Tn, Va, W, WH3; = Parietaria pennsylvanica Muhl. ex Willd. – Tat, orthographic variant; > Parietaria obtusa Rydb. – F, S13, Tx; > Parietaria pennsylvanica Muhl. ex Willd. – S13; > Parietaria pensylvanica Muhl. ex Willd. – F, Tx, WV, sensu stricto; > Parietaria pensylvanica Muhl. ex Willd. var. obtusa (Rydb. ex Small) Shinners – NcTx; > Parietaria pensylvanica Muhl. ex Willd. var. pensylvanica – NcTx

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU
• Eastern Mountains and Piedmont: FACU
• Great Plains: FAC
• Midwest: FACU
• Northcentral & Northeast: FACU

Heliophily ?: 5