Have you ever seen a plant with tree cotyledons?

http://www.geocities.com/artyard/piante/trico2.html

it's an heliantus annuus

How can it be?

Its one of the signs of the coming apocalypse!!

Just kidding.

It happens all the time.

Finding out how it happens would be a good subject for an article!

BTW, Helianthus annuus is an annual (by definition) not a tree.

"cristina" wrote in message
...
Have you ever seen a plant with tree cotyledons?

http://www.geocities.com/artyard/piante/trico2.html

it's an heliantus annuus

How can it be?

Cereus-validus wrote:

Its one of the signs of the coming apocalypse!!

Just kidding.

It happens all the time.

Finding out how it happens would be a good subject for an article!

BTW, Helianthus annuus is an annual (by definition) not a tree.

Sorry, i'm writing from italy and my english is not good, i had to write "three" not tree...

Cereus-validus wrote:
BTW, Helianthus annuus is an annual (by definition) not a tree.

cristina schreef
Sorry, I'm writing from Italy and my english is not good, I intended to
write "three" not tree...

+ + +
Don't mind the 'mighty candlestick':
he is mostly an automaton and hardly ever stops to think.
BTW calling Helianthus annuus a tree is less bad than calling a palm a tree.
What is bad is writing it as "helianthus annuus".

Dicotyledons can have up to four cotyledons (maybe more?).
PvR

In article ,
wrote...

Have you ever seen a plant with tree cotyledons?

Yes, and ones with four and five or more cotyledons.

http://www.geocities.com/artyard/piante/trico2.html

it's an heliantus annuus

How can it be?

It's a fairly common individual aberration seen in species normally
with two cotyledons [e.g., you will often find several such in a large
tray of newly germinated tomato plants], but there are also a number of
groups of flowering plants known that are characterized by normally
having three, four, or more cotyledons [e.g., some Pittosporum spp.,
Degeneria, Idiospermum, Opiliaceae, some Olacaceae].

Pines aren't angiosperms, of course, but they are familiar examples of
plants with many cotyledons.

A web search for "multiple cotyledons" finds that these also often
occur in experimentally cultured or regenerated embryos, and
characterize specific genetic mutations known in various plants.

cheers

thanks to all!