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Solidago rigidiuscula (Torrey & A. Gray) Porter. Subgenus: Solidago. Section: Erectae. Series: Erectae. Narrowleaf Showy Goldenrod. Phen: (Aug-) Sep-Oct. Hab: Limestone barrens. Dist: ON west to ND and WY, south to TN, LA, and TX; disjunct eastward in glade habitats to nw. GA (GANHP), TN (Chester, Wofford, & Kral 1997), KY, and possibly NC and SC. Semple et al. (2012) also mention occurrences as far east as the Carolinas; this requires additional assessment.

Origin/Endemic status: Native

Taxonomy Comments: Probably best accorded specific rank, following Semple et al. (2012).

Synonymy: = Il, S, Semple et al (2012), Semple, Tong, & Chong (2017a); = Solidago speciosa Nutt. ssp. speciosa var. rigidiuscula – Ar, FNA20; = Solidago speciosa Nutt. var. angustata Torr. & A.Gray – F, misapplied; = Solidago speciosa Nutt. var. rigidiuscula Torr. & A.Gray – C, G, GrPl, K1, K3, K4, Mo2, NcTx, Oh3, SE1, Tn, Tx; < Solidago speciosa Nutt. – RAB

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Heliophily ?: 8

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image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Shaun Pogacnik, some rights reserved (CC BY-NC), uploaded by Shaun Pogacnik source CC-BY-NC, permission granted to NCBG | Original Image ⭷

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