Re: 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 this
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,"
>
>
http://www.anbg.gov.au/abrs/online-resources/flora/nameslist.xsql?pnid=4559
>
> 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 it
is
> deciduous, dying back in winter (rather than your case of summer). I grow
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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