Today, I walked past this large Western Sword Fern and did a classic double take -- all of the new growth fronds had sori developing on the UPPER surface of the leaflets!! The number of sori per leaflet ranged from 1 to 3 and the sori themselves seemed to be developing at the same rate as the full compliment of normally occurring sori on the underside of the leaflets.
Photos 1 - 5 show the upper surface of fronds and Photos 6 & 7 show the underside.
I've never seen anything like this before and I'd be very keen to hear from any others who may have seen and documented this anomaly on Western Sword Fern.

This is a follow-up to an observation by @galash and represents a northern range extension of 350 km for Myriopteris intertexta: https://www.inaturalist.org/observations/39517183

Leaves lanceolate to ovate-deltate, 3-pinnate at base. Pinnae segments round to ovate. Abaxial surface of pinnae segments covered with branched hairs, partly concealed by wider scales. Scales on abaxial surface of costa long lanceolate, deeply cordate at base, with overlapping basal lobes. Rhizome scales bicolored, with broad well-defined dark central stripes and narrow, light brown margins. Spores averaging more than 55 µm in diameter.

More than 100 plants were observed on a basalt cliff with an east aspect. Many of the plants were large and presumably very old. There are many kilometers of similar habitat in the lower Deschutes River valley and its tributaries. With this observation and another recently verified location in the Painted Hills north of Mitchell, it's clear that M. intertexta is well established in north central Oregon. Additional surveying will likely turn up other populations. I would not be at all surprised to find it in similar basalt outcrops in central Washington.

My friend Josh Copan and I spotted this intriguing specimen in Jackson Co. Ohio. Appears to Be A. pinnatifidum, but this plant had multiple tipping rooting fronds. Found associated with A. pinnatifidum, A. Montanum, and A x trudellii. I have read about A. pinnatifidum being an ancient hybrid between A. montanum and A. rhizophyllum but cannot find any sources of them tip rooting.