UKTC Archive

Re: Walnut

Subject: Re: Walnut
From: Jane Westover
Date: Mar 12 2001 20:43:46
    Thanks for your response, which corrects some of my own ideas. There is
a clear difference between acorns and hazelnuts on the one hand, and walnuts
and almonds on the other, but you mention chestnuts as a "dry single seeded
fruit that does not split open to release the seed". Surely, that is exactly
what they do; the spiney  green outer casing (fruit ?) of both Horse and
Sweet Chestnut splits open to reveal multiple seeds (nuts ?). Also, Sweet
Chestnut belongs to the same family as Oak (Fagaceae)  Is this all a matter
of terminology,or am I going.....?

----- Original Message -----
From: "Alan Reeves" <>
To: "UK Tree Care" <>
Sent: Friday, March 09, 2001 10:31 PM
Subject: Re: Walnut

In Walnut the number of cotyledons is not related to
the number of valves the nut may appear to have.
While multiple cotyledons may occur in sports, - twins
or triplets in the sense of multiple embryos within
the fruit, which is typically monocarpic, are probably
more frequent  than we realise. The nut is part of a
fruit and, in the case of walnut usually contains one


Any dry, single-seeded fruit that does not split open
to release the seed, such as the chestnut. A nut is
formed from more than one carpel, but only one seed
becomes fully formed, the remainder aborting. The wall
of the fruit, the pericarp, becomes hard and woody,
forming the outer shell.
Examples of true nuts are the acorn and hazelnut. The
term also describes various hard-shelled fruits and
seeds, including almonds and walnuts, which are really
the stones of drupes, and brazil nuts and shelled
peanuts, which are seeds.

1. JUGLANDS L. Walnut

"Trees with glandular twigs and chambered
pith. Leaflets 7-19, lanceolate or ovate shaped, 3-15
cm long, 1.5-5.5 cm wide, pubescent beneath,
acuminate, serrate, base rounded, oblique, or cordate,
sessile or subses sile. Staminate flowers bracteate,
pedicellate, in elongate, pendulous catkins, calyx 3-6
lobed, stamens usually numerous, filaments short or
absent. Pistillate flowers bracteate sessile, solitary
or in few-flowered spikes, caylx 4 parted, stigmas and
styles 2, ovary surrounded by cup-shaped involucre.
Fruit large, drupaceous." (Radford)

--- Jane Westover <>
wrote: > Chris
The seed or nut of a dicotyledonous plant normally
contains two cotyledons
(as the term suggests), which form the first pair of
leaves when germination
occurs. I have grown several hundred oak from
acorns, and a small proportion
have produced twins, and an even smaller proportion
have produced triplets,
the acorns therefore having four and six cotyledons
This Walnut may be an example of this. If
germinated, will it produce one
seedling with three seed-leaves, two seedlings, (one
with only one
seed-leaf), or will one of the cotyledons be
aborted. I'ld be interested to
know the result, if Mr Benz tries.

Stephen Westover

----- Original Message -----
From: "Chris Skellern" <>
To: "UK Tree Care" <>
Sent: Thursday, March 08, 2001 9:12 AM
Subject: Walnut

Can anyone help this guy with information?

Chris Skellern.

----- Original Message -----
From: Klaus Benz <>
To: <>
Sent: 17 February 2001 20:17
Subject: Interesting Walnut.

I am not sure if yours is the actual department
for my enquiry but if not
please accept my apology for troubling you. My
interest is the following:
I have recently come across a walnut that has its
shell made in three
distinct sections. I am interested if this is an
unusual occurrence. The
actual nut which came from the Blackforest in
Germany is still intact and
my possession. I'm attaching a jpeg coloured
picture of the nut to give
Your reply on this point would be most
With kind regards,

Nikolaus J. Benz


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