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Re: Pteris cretica

  • Subject: Re: [ferns] Pteris cretica
  • From: "Dave Skinner" skinnerd@nettally.com
  • Date: Thu, 13 Feb 2003 22:10:31 -0500

I don't really know a whole lot about this, but will throw in my $.02.  I have had
Pteris cretica volunteer for me at a great distance from the mother plants, in
locations that I doubt the spores would have been disbursed by wind or rain.  It has
actually occured to me that they might have been spread by sticking to my gloves or
clothes.  Since Florida Caverns area has been a popular tourist area for many years,
is it not possible that someone unintentionally brought it there?  The spores must be
particularly viable and well suited for growth in this climate (I am only 50 miles
from there).

Also, for what it's worth....  Andre Clewell's well documented Guide to the Vascular
Plants of the Florida Panhandle has the following listing for Pteris cretica:

"Limestone outcrops in hammocks.  [Counties] Jackson, Gadsden, Liberty.  Introduced
from the Old World tropics."  Florida Caverns is in Jackson County.

He also lists Pteris multifida and Pteris vittata in the Florida panhandle with the
latter also naturalized from Old World tropics.

Dave Skinner - skinnerd@nettally.com or Dave@GingersRus.com
Le Jardin Ombragi, Tallahassee, Florida, USA
  Main Website  http://www.nettally.com/skinnerd/ombrage.html
  Ginger Website http://www.nettally.com/skinnerd/gingers.htm
  eBay Listings  http://www.GingersRus.com
----- Original Message -----
From: "Tony Avent" <tony@PLANTDEL.COM>
To: <ferns@hort.net>
Sent: Thursday, February 13, 2003 7:21 AM
Subject: [ferns] Pteris cretica

> Dear Fern Growers:
> Last week when I was botanizing in the Florida panhandle, I visited the
> Florida Caverns State Park near Marianna.  This natural area is filled with
> Pteris cretica.  In Nelson's Ferns of Florida, he describes this as a
> native of Florida and not introduced.  Nelson cites an early 1800's account
> when this fern was described from the panhandle with the author noting that
> although this was an Asian species, there was no sign of plant introduction
> in this area and this population must be native to the area.  Where I have
> seen this fern in the wild around the southeast, it usually occurs with
> other introduced fern species such as Cyrtomium fortunei.  This was not the
> case in the Florida population.  I'm curious if others on the list have
> thoughts about these populations of Pteris cretica as a native US plant and
> if these have ever been DNA analyzed and compared against Asian
> collections.  Thanks.
> Tony Avent
> Plant Delights Nursery @
> Juniper Level Botanic Garden
> 9241 Sauls Road
> Raleigh, NC  27603  USA
> Minimum Winter Temps 0-5 F
> Maximum Summer Temps 95-105F
> USDA Hardiness Zone 7b
> email tony@plantdelights.com
> website  http://www.plantdel.com
> phone 919 772-4794
> fax  919 772-4752
> "I consider every plant hardy until I have killed it myself...at least
> three times" - Avent
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