Arum hygrophilum, Asarum maximum and A. nobilissimum

Paul Licht plicht@berkeley.edu
Tue, 30 Mar 2010 15:37:16 PDT
On the 'other side of the coin', my A. hygrophilum here at home in 
Berkeley have been blooming for a month or more. I keep them outside in 
pots and in the ground, although I think only the pots have bloomed.  
Shows how climate matters. All I can say is that they take light frosts 
without problems.
Paul

Paul Licht, Director
University of California Botanical Garden
200 Centennial Drive
Berkeley, CA 94720
(510)-643-8999
http://botanicalgarden.berkeley.edu/



On 3/30/2010 8:42 AM, Jim McKenney wrote:
> Arum hygrophilum is starting to bloom in one of the protected cold frames.
> Of the two color forms shown on the wiki, I think my plant will be like the
> one with less white on the inside of the spathe.
>
> Also beginning to bloom are Asarum maximum and A. nobilissimum. I have two
> forms of A. nobilissimum. One has a bright white streak on the petals,
> somewhat like the big white patch on A. maximum. This one and A. maximum are
> in bloom today. The third plant, the other A. nobilissimum, is not yet open.
>
>
> I have two forms of A. maximum also. The one here for years has no cultivar
> name that I am aware of; and I recently acquired a plant of the cultivar
> 'Ling Ling', but this has not yet bloomed. It looks like a tissue culture
> plant.
>
> If you know only the native A. canadense, you will be surprised when you see
> the flowers of these two species: they are big, several inches across. A.
> maximum is very striking. The form of A. nobilissimum without the white
> patch is something else - gross, suggesting suppurating tissue or like
> something out of an anatomy or pathology book.
>
> A. maximum might work as a garden plant here: years ago I saw it in an
> unprotected spot in a local public garden. That was a nice clump full of
> flowers. When I checked the site the next year, it was gone. Perhaps it died
> during the winter. On the other hand, these striking plants are probably
> potent thief magnets (and no, that is not how I acquired my plant).
>
> A. nobilissimum came with a zone 8 rating (I'm in zone 7), and it's been in
> a cold frame and growing well since arrival several years ago.
>
> I have a hunch that these asarums are a lot more sun tolerant than they are
> given credit for.
>
> Jim McKenney
> jimmckenney@jimmckenney.com
> Montgomery County, Maryland, USA, 39.03871º North, 77.09829º West, USDA zone
> 7, where temperatures over 80 degrees F (~27 degrees C) are predicted for
> the weekend.
> My Virtual Maryland Garden http://www.jimmckenney.com/
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