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Re: Verna vs cristata foliage?


 

The question was posed how to tel cristata foliage and verna apart at this time of year. Attached are some photos that may help. the verna foliage is narrower and more swordlike. The cristata foliage is somewhat wider towards the middle and tends to curl downward about midway. There are three promineant nerves on the verna foliage and about 4-6 on the cristata foliage bot have one side of the leaf that is somewhat glaucous and a mat finish with the other side being less so and more shiny. Cristata leaves have this variation also but it is much less pronounced. The rhizome creeping on the ground tends to hover slightly above it but verna tends to be more submerged. The mountain form of verna tends to have the alternately swollen then constricted rhizomes much like cristata. Verna I believe grows more in the open whereas cristata favors denser shade. I hope this helps.


----- Original Message -----
From: "Dan & Marilyn Mason" <demason@tbaytel.net>
To: iris-species@yahoogroups.com
Sent: Thursday, June 10, 2010 11:56:24 AM GMT -05:00 US/Canada Eastern
Subject: Re: [iris-species] Verna vs cristata foliage?

 

El and Dennis,

I. Cristata grew at my old place for quite a few
years with little attention. It received morning
sun, but heavy shade from mid-day on. The soil
was mostly clay with some gravel, and some
natural humus, like woodland soil. The iris
received a mulch of leaves which fell from
nearby poplar and basswood trees every fall,
which I left in place. It increased slowly and
produced only a few flowers each year. Fans died
back each fall.

Immortality still survives at my old place, but
in ground with more sandy gravel at the surface,
and in full sun, compost a year before it was
planted. It was slow to moderate increasing, but
always bloomed twice each summer when I was
there to keep weeds down. I moved some of it
here last year to see how it does in heavy clay
with lots of peat type soil.

Dan Mason zone 3, NW ON, Canada
-----------------------------------------

El Hutchison wrote:
> I know what you mean, Dennis. About 15 miles
> or so from here, a couple of my garden
> friends have Immortality rebloom regularly in
> their gardens, whereas I can barely keep
> mine alive long enough to bloom once.
>
> I've got 2 little pieces of I cristata trying
> to grow here for the last 2 yrs. Just when
> I think they're dead, little shoots appear. I
> might try moving them to an even sunnier spot
> surrounded by pea gravel. Maybe I tried to
> protect them too much.

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