Cystopteris tennesseensis Shaver subsp. utahensis (Windham & Haufler) Windham, 2022

Cystopteris tennesseensis Shaver subsp. utahensis (Windham & Haufler) Windham View in CoL , comb. et stat. nov. BASIONYM: Cystopteris utahensis Windham & Haufler,Amer. Fern J. View in CoL 81:13–15.1981. TYPE. U.S.A. UTAH. Grand Co.:base of Morning Glory Arch in tributary of Negro Bill Canyon 3.93 km SE of its confluence with the Colorado River , 4300 ft, 2 Jul 1990, Windham (90-282) & Windham (HOLOTYPE: UT!; ISOTYPES: ASU!,BRY!,KANU!,MO!,UC!, US!,UTC!) 2 n =4x=168 [ Haufler et al.1993].

Voucher specimens for NEW MEXICO.Cibola Co.: NNE of Ramah along Cebolla Creek in the Zuni Mountains ca. 1.88 km WSW of Dan Valley Spring, T11N, R15W, Sec.5. Lat.: 35°12 ʹ 51 ʺ N, Long.: 108°26 ʹ 32 ʺ W (WGS84 Datum), elev. 7575 ft, cracks and crevices of E-facing sandstone outcrop with Pinus , Juniperus , Quercus & Pseudotsuga . 04 Sep 2003, M.D. Windham 2813 (UT 123563!). Eddy Co.: Guadalupe Mts., Middle Fork of Big Canyon, upper part near 32°02.543N 104°47.063W (T26S, R21E, S15), 6850 ft, mesic wooded limestone canyon bottom, shaded, 20 Oct 2007, Worthington 35040 (DUKE 397790!).

The largely allopatric distributions of the three subspecies of C. tennesseensis are outlined in Fig. 3 View FIG , and the following key (modified from the Flora of North America treatment by Haufler et al. 1993) summarizes the features used to distinguish them.

1. Leaf blades ovate to lanceolate,usually widest above the base;petioles often dark and shiny for much of their length; spores 49–60 µm;ne North America______________________________________________________________ subsp. laurentiana 1. Leaf blades deltate to narrowly deltate,usually widest at or near the base;petioles not dark and shiny or,if so,only near the base;spores 38–48 µm;e central to sw North America. 2. Rhizome scales papery, the lateral cell walls thin and the luminae not prominent; leaves rarely with multicellular, gland-tipped hairs in axils of pinnae;e central United States ______________________________________ subsp. tennesseensis 2. Rhizome scales sclerotic,the lateral cell walls thick and the luminae prominent;leaves often with multicellular,gland-tipped hairs in axils of pinnae; sw United States _____________________________________________________ subsp. utahensis