Woodsia plummerae

Woodsia plummerae Lemmon
(for S.A. Plummer Lemmon, 1836–1923, co-collector of the type specimen and wife of J.G. Lemmon, who described the species)

Local names: Plummer’s cliff fern, flowercup fern

Leaves to 18(–25) cm tall, usually smaller, the blades lanceolate to broadly so, 2-pinnate-pinnatifid, usually 2-pinnate proximally, occasionally forked at tip, typically densely glandular and sticky; indusia splitting into several spreading, relatively broad, irregular segments these toothed or lacerate into thread-like filaments only in the distal 1⁄2; spores 44–50 μm; 2n = 152 (tetraploid) (Windham 1993d). Cliffs and rocky slopes typically on igneous materials, but also reported on limestone (Yarborough & Powell 2002); Brewster (Correll 13639, BRIT), Jeff Davis (E. Whitehouse 11224, BRIT; J.W. Stanford & J.L. Blassingame 1166, HPC; O. Sperry T416, TAES), Presidio (R. McVaugh 7448, BRIT, TEX-LL), Culberson, El Paso, and Hudspeth (TEX-LL) cos. in the Trans-Pecos; and Armstrong Co. (B.C. Tharp s.n. 1929, TEX-LL, Palo Duro Canyon) in the Panhandle (a Randall Co. location mapped by Turner et al. [2003] is apparently a mapping error since the Panhandle record at TEX-LL is from Armstrong Co.); AZ, CA, CO, NM, OK, TX, also n Mexico. Sporulating late spring–fall. [Woodsia obtusa (Spreng.) Torr. var. glandulosa D.C. Eaton & Faxon, W. obtusa var. plummerae (Lemmon) Maxon, W. pusilla E. Fourn. var. glandulosa (D.C. Eaton & Faxon) T.M.C. Taylor] This species is a tetraploid whose parentage is unclear; it is known to hybridize with W. phillipsii to produce sterile triploids (Windham 1993d).

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