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harsiparkerתיאור
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.
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jnewton728תיאור
Fern growing in a mixed broadleaf and conifer forest in Lee County, Alabama, USA.
(The hairy stipe looks similar to Athyrium filix-femina, but the leaflets don't have the heel.)
Dryopteris erythrosora or
Dryopteris filix-mas?
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frondsinhighplacesתיאור
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.
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karro_frostתיאור
I'm not sure what this is, but am guessing it is not a typical expression of whichever species it is. Might be a hybrid. I'd love some opinions.
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eralversonתיאור
I spoke with the owner of this truck, he was very proud of his epivehicular fern colony. Apparently at one time it had been larger but someone stole a portion of the plant.
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גפיתיים (משפחה Thelypteridaceae)מתצפת.ת
esummerbellתיאור
Only one small clump of this fern. I don't think I've seen this species before, so not sure what it is. About 8 fronds in this clump, only 2 of them have sori, which look like little orange powdery clusters. Hairs along the stipe/rachis/costae are rather long and black. Fronds in a clump with house holly fern and ebony spleenwort, in a bamboo grove, about 50ft from the creek.
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שערות שולמית מצויות (Adiantum capillus-veneris)מתצפת.ת
pascal1331תיאור
I found a bunch of these while riding the metro, turns out NPR had a segment on them and this what a professor at Van Ness University thinks they are
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cjpasicheתיאור
On thin soil among bryophytes in woods on top of hill next to a stream.
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shaunpogacnik95תיאור
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.
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perlmutterמקום
Presidio, San Francisco, Golden Gate National Recreation Area, California, United States (Google, OSM)
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rockybajadaתיאור
Location approximate. I can't remember exactly where it was, but definitely on the north-facing side.
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סוג Pellaeaמתצפת.ת
mariamildredתיאור
Small fern-like, thick leaves, on cracks between rocks of an old church from 1880's.
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emmieq912תיאור
hanging out in barrens to west of Firebreak 3 and backlit by the evening sun low on the horizon.
