Re: Re: CULT: Growing Iris South Florida
iris@hort.net
  • Subject: Re: Re: CULT: Growing Iris South Florida
  • From: C* C* <d*@rewrite.hort.net>
  • Date: Sun, 9 Nov 2014 14:08:23 -0500
SDB are genetically 12/12/8/8 with the 8 set being from pumilla. Pumilla are cold climate teraploids that have the higher vernalization needs. 

Chuck Chapman

-----Original Message-----
From: Phloid <4390a9e81@rewrite.hort.net>
To: iris <iris@hort.net>
Sent: Sun, Nov 9, 2014 1:58 pm
Subject: Re: [iris] Re: CULT: Growing Iris South Florida

The mention of I. aphylla leads me to comment on a variant of it.
Nudicaulis (Hook, J.D.  collected 1869) a variant of I. aphylla. Don't
know where collected.
Rather surprising to me it was one the better performers in the TX
study. The TX study was in a zone 8 place so not remarkable in the
vernalization matter I guess. Within expected threshold for I. aphylla?
The description by Hooker implied it blooms about 12 inches or so that
would make it a horticultural SDB, no? Genetically it is 2n=48. Is the
rule of thumb about SDB's not doing well in hot climates for TB x MDB
crosses? Tetraploids may not adhere to the rule of thumb?

Shaub Dunkley

On 11/9/2014 12:47 PM, Chuck Chapman wrote:

For information purposes.   I  have taken aphylla that went into
dormancy and maintained them at temperatures above vernaliztion over
winter indoors under lights. they remained dormant. In spring I
planted them back outside. They remained dormant all summer and
eventually died.

Chuck Chapman





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