Mystery bulb - Ismene x Festalis?
John Bryan (Sun, 19 Jun 2005 10:11:09 PDT)

Hi All

Has this been accepted? Cheers, John E. Bryan

"crinum@libero.it" wrote:

Hi all,
Ismene was segregated from Hymenocallis by Meerow in 1990. The main feature to distinguish the two groups is just the false stem: in Ismene (including Ismene, Elisena and Pseudostenomesson) the sheating leaves form a long false stem; in Hymenocallis (Hymenocallis and Leptochiton) at the base the leaves can form a short neck, never a long false stem. Moreover number chromosome (2n=46 commonly in Ismene; 2n= 46, 44, 40 commonly in Hymenocallis),ovary, seed morphology, distribution....
Alberto
Italy

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From : pbs-bounces@lists.ibiblio.org

To : "Pacific Bulb Society" pbs@lists.ibiblio.org
Cc :
Date : Fri, 17 Jun 2005 16:48:43 -0700

Subject : Re: re [pbs] Mystery bulb - Ismene x Festalis?

Dear Paul:

I think certain Hymenocallis have foliage that form a 'false' stem by
the foliage sheathing the stem. Cheers, John E. Bryan
Paul Tyerman wrote:

At 02:56 18/06/05, you wrote:

Dear Alberto:

Thanks, I guess the mystery bulb remains just that, a mystery! Cheers,
John

John et al,

This sounds like Ismene x Festalis (Not Hymenocallis, although for some
reason in the US in particular Ismene are called Hymenocallis all the
time?). Ismene and Hymenocallis are not the same thing despite this cross
usage of the name. My understanding is that the difference between Ismene
and Hymenocallis is the fact that Ismene have the leaves bound together at
the base by a sheath, whereas the Hymenocallis have their leaves free
immediately they exit the ground.

If memory serves me it was Alberto Castillo who gave this wonderfully clear
differentiation about a year or so ago, but I am not sure which list it was
on. I think from memory I kept the email (as I found it so useful to clear
up the whole Ismene / Hymenocallis thing) so I can try to dig it up for you
if you would like?

I would definitely say that the mystery bulb sounds 100% like Ismene x
Festalis as it matches perfectly what we have under that name here in
Australia and they are distinctly different from any of the Hymenocallis
that I grow.

Cheers.

Paul Tyerman
Canberra, Australia. USDA equivalent - Zone 8/9

Growing.... Galanthus, Erythroniums, Fritillarias, Trilliums, Cyclamen,
Crocus, Cyrtanthus, Oxalis, Liliums, Hellebores, Aroids, Irises plus just
about anything else that doesn't move!!!!!

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Alberto Grossi
Italy

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