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Author Topic: Cornus ?  (Read 2268 times)

Rick R.

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Re: Cornus ?
« Reply #15 on: June 23, 2018, 04:03:50 PM »
I asked someone here in the USA, and he confirmed:
Twinberry honeysuckle, Lonicera involucrata.

I tried the thread test, too, on Cornus mas - the only cornus I have.  Didn't work on the first leaf, but I tried again, more carefully and pulled apart very slow.  Yes, there are the threads that are just as Carolyn says.

Went around trying it on other things in my yard:
Hamamelis
Salix
Quercus
Liriodendron
Calycanthus
Betula
Dirca
Magnolia
Viburnum
Aralia
Epimedium
Lonicera
Euonymus
And some vines:
Clematis
Apios

None worked except one out of four spp. of Salix and one out of five spp. of Viburnum.  Even so, threads never got longer than 5mm, and it wasn't consistent.

Viburnum
Rick Rodich
just west of Minneapolis, Minnesota, USA
USDA zone 4, annual precipitation ~24in/61cm

Carolyn

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Re: Cornus ?
« Reply #16 on: June 23, 2018, 07:39:08 PM »
Rick,
I wish you hadn't discovered that for the viburnum! I tried this method to help ID a Chris Chadwell seed collection shrub from the Himalayas which he described merely as "unidentified shrub with blue fruits". The cornus leaf test worked on it, so I thought  I had at least narrowed it down to cornus.
My shrub is collection no CC7412, from Chris's 2013 expedition. Is anyone else growing this? It's rather nice, with its red stems - which made me think cornus. Does anyone know what it might be?
619369-0
Carolyn McHale
Gardening in Kirkcudbright

Diane Whitehead

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Re: Cornus ?
« Reply #17 on: June 23, 2018, 08:40:25 PM »
Carolyn, the vein pattern is helpful in identifying trees.  Could you post a close-up of a leaf?
Diane Whitehead        Victoria, British Columbia, Canada
cool mediterranean climate  warm dry summers, mild wet winters  70 cm rain,   sandy soil

Carolyn

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Re: Cornus ?
« Reply #18 on: June 24, 2018, 01:34:41 PM »
Photo of unidentified shrub with blue fruits, CC7412, from 2013 expedition to Himalayas.

By the way, Diane, the cornus leaf test does work on Cornus kousa - I've just tried it. You must have been tearing the leaf too violently. You need to pull it apart very gently.619379-0
Carolyn McHale
Gardening in Kirkcudbright

Rick R.

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Re: Cornus ?
« Reply #19 on: June 24, 2018, 10:58:22 PM »
Looks pretty Cornus like to me, but I certainly don't know to many shrubs/trees beyond zone 5 hardiness.  Any pics of fruit, flowers, inflorescence structure, winter buds?
Rick Rodich
just west of Minneapolis, Minnesota, USA
USDA zone 4, annual precipitation ~24in/61cm

Carolyn

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Re: Cornus ?
« Reply #20 on: June 25, 2018, 08:58:57 AM »
No, the plant isn't old enough to flower yet and I have no winter pictures of it. I haven't planted it out in the garden yet as I would like to know its growing requirements. I guess semi-shade might be a reasonable bet.
Carolyn McHale
Gardening in Kirkcudbright

 


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