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Author Topic: Rock ferns  (Read 45649 times)

Brian Ellis

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Re: Rock ferns
« Reply #165 on: September 21, 2013, 03:31:40 PM »
  .....seen the snowdrop threads recently? ( ;D)

Behave yourself ;)
Brian Ellis, Brooke, Norfolk UK. altitude 30m Mintemp -8C

Ed Alverson

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Re: Rock ferns
« Reply #166 on: September 21, 2013, 08:22:46 PM »
Adiantum aleuticum japonicum

It is interesting that such very similar plants can grow naturally in Japan and North America, and speaks to the long history of species migrating from Asia to North America - or vice-versa- over millions of years.

Speaking of Adiantum aleuticum - as a follow-up to an earlier mention of var. subpumilum in this thread in July 2012 - I thought I would post some photos of this dwarf var. growing in the wild. Its natural habitat is very interesting - it only grows on overhanging cliffs right above salt water on the west coast of Vancouver Island, British Columbia. Here are some old photos from when I was shown one of the sites in the 1980's. The ferns can be seen in the middle photo as green spots on the "roof" of the rock alcove on the right side of the photo, to the right of the natural rock arch.

Ed
Ed Alverson, Eugene, Oregon

johnw

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Re: Rock ferns
« Reply #167 on: September 21, 2013, 08:42:07 PM »
  .....seen the snowdrop threads recently? ( ;D)

Well Giles, then you know very well the prices do change on Galanthus and so too the labels.
« Last Edit: September 21, 2013, 08:44:53 PM by johnw »
John in coastal Nova Scotia

Maggi Young

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Re: Rock ferns
« Reply #168 on: September 21, 2013, 09:05:44 PM »
Ed: Quite a surprise to me to see the habitat of the Adiantum on Vancouver Island.
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

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Ed Alverson

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Re: Rock ferns
« Reply #169 on: September 21, 2013, 09:09:56 PM »
Ed: Quite a surprise to me to see the habitat of the Adiantum on Vancouver Island.
Yes, they seem so delicate, but in some ways at least they aren't.
Ed Alverson, Eugene, Oregon

Hoy

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Re: Rock ferns
« Reply #170 on: September 22, 2013, 12:19:11 PM »
Ed, what a special landscape! I am living at the western coast of Norway and used to see coastal landscapes but nothing quite like that!
Does the Adianthum need the sea spray or can it grow more sheltered too?
Trond Hoy, gardening on the rainy west coast of Norway.

ruweiss

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Re: Rock ferns
« Reply #171 on: September 22, 2013, 08:49:37 PM »
Some ferns from my garden
Asplenium fontanum
Cheilanthes lanosa
Cheilanthes intertextus
Notholaena marantae
Rudi Weiss,Waiblingen,southern Germany,
climate zone 8a,elevation 250 m

Ed Alverson

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Re: Rock ferns
« Reply #172 on: September 22, 2013, 11:26:03 PM »
Ed, what a special landscape! I am living at the western coast of Norway and used to see coastal landscapes but nothing quite like that!
Does the Adiantum need the sea spray or can it grow more sheltered too?
I don't believe Adiantum aleuticum var. subpumilum requires sea spray - it grows just fine in regular rock gardens - and in fact my theory is that the shortened pinnae of this variety are an evolutionary response to the salt spray. Fronds that stick out away from the cliff are more likely to be burned by the salt spray, and thus plants with shorter pinnae have been selected for in these habitats.
Ed Alverson, Eugene, Oregon

Giles

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Re: Rock ferns
« Reply #173 on: October 04, 2013, 09:29:11 PM »
UK's seaside fern: Asplenium marinum

Giles

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Re: Rock ferns
« Reply #174 on: October 04, 2013, 09:31:13 PM »
Wellies or speedos: depends if you can read a tidetable.
« Last Edit: October 04, 2013, 09:43:05 PM by Giles »

David Nicholson

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Re: Rock ferns
« Reply #175 on: October 05, 2013, 09:45:01 AM »
Do I deduce that wasn't taken in Northants Giles ::) :P
David Nicholson
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Giles

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Re: Rock ferns
« Reply #176 on: October 05, 2013, 11:38:19 AM »
My new water feature, David  ;D
« Last Edit: October 05, 2013, 11:40:46 AM by Giles »

David Nicholson

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Re: Rock ferns
« Reply #177 on: October 05, 2013, 06:37:21 PM »
 ;D ;D ;D
David Nicholson
in Devon, UK  Zone 9b
"Victims of satire who are overly defensive, who cry "foul" or just winge to high heaven, might take pause and consider what exactly it is that leaves them so sensitive, when they were happy with satire when they were on the side dishing it out"

Ed Alverson

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Re: Rock ferns
« Reply #178 on: October 06, 2013, 02:10:42 AM »
UK's seaside fern: Asplenium marinum
The habitat of Asplenium marinum is in many ways similar to Adiantum aleuticum var. subpumilum: overhanging rock alcoves just above the beach. Must be some "fern thing" that allows these plants to survive in such a rugged habitat.
Ed Alverson, Eugene, Oregon

Ed Alverson

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Re: Rock ferns
« Reply #179 on: October 06, 2013, 02:19:23 AM »
Ed, what a special landscape! I am living at the western coast of Norway and used to see coastal landscapes but nothing quite like that!
Does the Adiantum need the sea spray or can it grow more sheltered too?
One difference to keep in mind is the difference in latitude: Vancouver Island is 48 deg. 30 minutes to 51 degrees N latitude (the equivalent of Normandy to Flanders in Europe), but the southernmost point of Norway is 58 degrees north. So naturally the Norway Coast would be a more harsh environment.
Ed Alverson, Eugene, Oregon

 


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