Re: Dryopteris nigropaleacea

Thank you very much for the info, Tom. From this description, I doubt very
much that this is a fern that would be suited to the heat and humidity of
central Kentucky summers.  1500 meters and up is pretty high.


----- Original Message ----- 
From: "Tom Stuart" <tstuart@westnet.com>
To: <ferns@hort.net>
Sent: Monday, December 06, 2004 7:14 PM
Subject: Re: [ferns] Dryopteris nigropaleacea


> > Where and what is its native habitat. What is the hardiness in terms of
cold
> > temperature? Is it evergreen or deciduous?  What is the rhizome type and
are
> > there any special cultural needs. A brief description of the frond form
> > would also be appreciated.
>
> S.P. Khullar's "An Illustrated Fern Flora of the West Himalaya" places
this in
> Fraser-Jenkins's Section Pallidae, characterized as 2-pinnate, broad at
the
> blade base, parallel-sided, sometimes stalked pinnules, a long stipe, and
> glossy, abundant stipe scales.
> Better known members of the section are Dd. marginalis, uniformis,
sublacera,
> odontoloma, arguta, and stewartii. D. nigropaleacea is native to Pakistan,
> Kashmir, and West Nepal at altitudes from 1500 to 2500 m.. Since the
source is
> not readily available, a substantial slice of the description:
>
> Rhizome long, decumbent ascending, thick, scaly. Stipes 16-55 cm. long,
> stramineous to light-brown, thick (to .2 cm diam.) base densely scaly and
> fibrillose, scales at stipe base ... dark-brown or blackish, concolorous,
to
> 1.5 cm, broadly ovate-lanceolate, margin with toothlike projections ....
Rachis
> stramineous, almost glabrous or with a few light-brown scales [continuing
to
> the costa] .... Lamina 2-pinnate, 20-60 cm long, 10-25 cm broad, narrowly
> triangular-lanceolate, ... lower surface pale green, upper mid- or
blue-green,
> often glaucous, matt, glabrous; pinnae 18-21 pairs, ... pinnules to 2 cm x
.8
> cm ...  basiscopic pinnules often slighly larger ...  margin lobed ..
veins
> free, forked, curved, running to the teeth of the lobes, but not to the
margin.
> Sori small, medial, 4-6 pairs on each side of the costule ... indusia
brown,
> reniform, shrivelling at maturity, margin almost entire.... A diploid
species.
>
> From the notes:
> "This fern was formerly known in error as D. odontoloma." The cited
differences
> would be difficult to discern for someone not familiar with both.
>
> Tom Stuart, New York
>
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