Cheilanthes fendleri

Cheilanthes fendleri Hook.
(for August Fendler, 1813–1883, one of the first botanists to collect in New Mexico and Venezuela)

Local names: Fendler’s lip fern


Rhizomes long-creeping; leaves scattered, 7–30 cm long; petioles dark brown, rounded on upper surface; leaf blades lanceolate to ovate-deltate, 1.5–5 cm wide, 3–4-pinnate at base, the pinnae not articulate, the largest ultimate segments 1.5–3 mm long, rounded, bead-like, glabrous on lower (unusual in that most species except C. aemula and C. alabamensis are hairy) and upper surfaces; scales on underside of costae lanceolate-ovate, conspicuous and often concealing the ultimate segments when viewed from below; 2n = 60 (Windham & Rabe 1993). Dry wooded banks, ledges, crevices, around boulders, rocky slopes in pine-oak forests; Jeff Davis (e.g., Correll 13510, 13522, BRIT, TEX-LL), Presidio (Warnock & A. Powell 17787, SRSC), El Paso, Hudspeth, and Brewster (Yarborough & Powell 2002) cos. in the Trans-Pecos; a colletion labelled as coming from Culberson Co. (Warnock 23704, SRSC, TEX-LL) is apparently an error because the location given (Eagle Mts.) is in Hudspeth Co; AZ, CO, NM, and TX; also nw Mexico. Sporulating summer–fall. [Myriopteris fendleri (Hook.) E. Fourn.] This species is a sexual diploid, and based on molecular evidence it is the maternal parent of the triploid C. wootonii and has also contributed genetic material to C. yavapensis (Grusz et al. 2009). The combination of ovate non-ciliate costal scales and the complete lack of other leaf pubescence is distinctive for this species (Yarborough & Powell 2002). Because of its rareness and limited distribution in the state, we consider this species to be of conservation concern in TX.



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