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Re: Adiantum whiteii

  • Subject: Re: [ferns] Adiantum whiteii
  • From: "Judith I Jones" judith@fancyfronds.com
  • Date: Sat, 12 Nov 2005 10:05:07 -0800

Hello Keith,
    Thank you for the further details on Adiantum whiteii.  This was passed
along to me from a very good friend when he moved from a beningn gardening
zone to a much harsher zone.  I was fortunate to be on the reciving end of
oneo of every fern in his collection.
    You might be interested to know that I have kept Asplenium goudeyi in my
barely heated greenhouse for the last four winters.  It has not only
survivied down to 24F but benn frozen solid for nearly three weeks with a
high of 30F with no damage whatsoever to the foliage.   kept a little onthe
dry side nestled in among my xeric fern collection.  Bob Halley of hte San
Diego Fern Society sent me the taxonomic description but if you have any
other interesting details about it I would be most delighted to know them.
Frondifrocially yours,
Judith I. Jones
from the Fronderosa in Gold Bar, WA at the base of ahte Cacaade Mountains
along the Skykomish River.
----- Original Message -----
From: "Keith Rogers" <kerogers@iprimus.com.au>
To: <ferns@hort.net>
Sent: Friday, November 11, 2005 7:05 PM
Subject: RE: [ferns] Adiantum whiteii

> Hi Judith, Tom and all
> Adiantum hispidulum var Whiteii or these days A. whiteii is an endemic
> species found in 3 places up to about 200km from Brisbane, Qld.
> These areas are Sub-tropical, one an Island the others gullies in a
> range.
> Our cold here down to -5C or 23F, it does start to fall over, but
> in the spring.  They like a good amount of sun and good drainage.  I use
> Orchid bark, 30% perlite and Oak Leaves in the mix.
> I find A. whiteii interesting because the stipe, held up to the light, you
> can see the minute white hairs on it against the black.
> Keith Rogers
> Mannum South Australia
> -----Original Message-----
> From: owner-ferns@hort.net [mailto:owner-ferns@hort.net] On Behalf Of
> I Jones
> Sent: Saturday, 12 November 2005 5:08 AM
> To: ferns@hort.net
> Subject: Re: [ferns] Adiantum whiteii
> Hello.
>     I have grown Adiantum hispidulum var. whitei for about 15 years as a
> cool greenhouse plant.  t very rarely goes dormant even when the barely
> heated greenhouse goes down to the mid-20's (F).  Ih ave not tried it
> outside in the ground but since Adiantum hispidulum goes dormant with
> estended cold in our mild Pacific Northwest zone 8 I would imagine that
> variety will also.  The frond stands very upright in habit rather than the
> norizontal angle favored by the typical species.
> Judith I. Jones
> ----- Original Message -----
> From: "Tom Stuart" <tstuart@westnet.com>
> To: <ferns@hort.net>
> Sent: Thursday, November 10, 2005 4:02 PM
> Subject: Re: [ferns] Adiantum whiteii
> > > Could someone please tell me if Adiantum whiteii deciduous is?  Mine
> grows
> > > lovely each year and at the start of summer it suddenly looks like its
> dying
> > > and just before I think now he is dead there are now fronds immerging.
> Now
> > > I am wondering if it might be deciduous.
> >
> > I am unfamiliar with A. whitei, an uncommon fern, but a full description
> can be
> > found under the name A. hispidulum var. whitei in the "Flora of
> Australia,"
> >
> >
> >
> > It is endemic to eastern Queensland. A. hispidulum var. hispidulum, the
> rosy
> > maidenhair, is widely distributed from New Zealand westward to Africa in
> > tropical, subtropical, and warm temperate areas. In temperate locations
> is
> > deciduous, dying back in winter (rather than your case of summer). I
> this
> > as a houseplant, and treated this way it is evergreen, flushing rosy in
> spring.
> >
> > An earlier reference, Christopher Goudey's "Maidenhair Ferns," regards
> whitei
> > as a hybrid between hispidulum and formosum. The latter is a much larger
> > Adiantum (to 1.5 m.), more divided, and with deeply-buried rhizomes (as
> much as
> > 60 cm., rivalling Pteridium). Photos there are consistent with an
> intermediate
> > form. A deep rhizome could be an adaptation to drought or fire. A.
> formosum is
> > native to eastern Australia in warm-temperate or subtropical forests,
> > overlapping distribution with the rosy maidenhair.
> >
> > Of Adiantum whitei in cultivation, Goudey writes, "A. whitei is hardy
> > [Victoria, Australia] and grows best for me planted in the ground, in a
> cool
> > well-drained fernery. It can be propagated by division."
> >
> > I could find no photos on the web.
> >
> > Tom Stuart
> > New York
> >
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