MWP Quiz 19

Some fun for the hard working botanists and green fingered. A sort of posting Quiz and educative posts. N-Joi...

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MWP Quiz 19

Post by MWP admin » Sat Sep 16, 2006 9:46 pm

Good luck!
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part of plant
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Post by jackpot » Sun Sep 17, 2006 10:12 pm

a root of Lemna :lol:

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Post by MWP admin » Mon Sep 18, 2006 12:27 pm

Congratulations:
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Whole plant of Lemna Minor
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Post by IL-PINE » Mon Sep 18, 2006 12:43 pm

wow!

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Post by MWP admin » Mon Sep 18, 2006 12:58 pm

I read on Haslam that they flower in May.... where / how are the flowers formed? just curiosity
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Post by Sdravko » Tue Sep 19, 2006 11:15 am

The flowers are formed within a membranous, saclike spathe (open at top only) inside budding pouches.
Wow, beautiful pictures. I will certainly ask you to illustrate my Lemnaceae paper. Unfortunately, Argotti reports that most of my Lemnas died during the summer. :(

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Post by MWP admin » Tue Sep 19, 2006 12:23 pm

I have some 10 other photos to choose from. Permission granted on the usual request of an acknowledment caption in the paper (and a copy of the paper for my library if possible!)

Note that I did not receive any email - hope it was not killed by my spam shredder
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Post by robcar » Tue Sep 19, 2006 2:19 pm

A question for jackpot

Can you please illuminate me as to how you managed to identify this one - what makes a root of Lemna any different from the roots of many other plants that are not hydrophytes?

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Post by jackpot » Tue Sep 19, 2006 2:46 pm

:lol: ok, pretty easy to answer: almost 40 years experience with plant morphology! This root is not branched: a monocot! No hairs and no soil particels: Not an terrestrial monocot but an aquatic plant! Very long and thin (only Lemna or Spirodela)! Singular per frond (the distance to the other root in the pic shows that this one comes from another frond or plant: Lemna! :D
But I can understand your question very well! I ask in the same direction my kids how they are able to know (and to remember) all the different terms and order/commands/instruction they need to setup my PC (and they had no 40 years...)

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Post by robcar » Tue Sep 19, 2006 6:40 pm

Thanks very much - a very clear explanation indeed :!: 40 years experience in plant systematics seems to give far better results than going around the countryside looking for nice, big, showy, fancy plants :!: :D

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Post by jackpot » Tue Sep 19, 2006 10:16 pm

not really- but 40 years going around countrysides looking for nice, big, showy, fancy plants... :D :wink:

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Post by Sdravko » Wed Sep 20, 2006 10:58 am

actually, this is quite a difficult plant. i used to think for months its Lemna turionifera until some of my cultivated plants sprouted several roots per frond. since than i think some turions of spirodela mioght develop very slowly in Malta and might mimic Lemna for months before turning miraculously into spirodela.

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Post by MWP admin » Wed Sep 20, 2006 2:21 pm

Moment moment... I was sure that this is Lemna minor. Is it / could it be something else ??

Question: In the second photo, left side, there is a purpulish budding like growth? What is that? Asexual reproduction by budding or some membranous flower?
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Post by Sdravko » Wed Sep 20, 2006 4:10 pm

definitely not Lemna minor. but Lemnaceae are a notoriously difficult Family. why do you think im studying them? The purplish thing might be a new frond.
as i promised you you will get the opportunity to photograph all samples i have and you can post them if im ever able to identify them.

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Post by jackpot » Wed Sep 20, 2006 10:16 pm

up to now definitely Lemna minor agg. in the classical sense, may be later another name after acceptance... (not important now in this forum)

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Post by MWP admin » Wed Sep 20, 2006 11:03 pm

Thanks JP, I prefered to hear your 'simple' reply rather than Sdravko difficult one :lol:
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Post by Sdravko » Thu Sep 21, 2006 10:55 am

Botany is never simple! :wink:

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A present Pic

Post by MWP admin » Thu Sep 21, 2006 11:03 am

Here is a present pic as a thanks for your additional help.
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Ischnura genei - Damesfly - Damigella

from the family: Coenagrionidae
(weak-flying insects with a slender abdomen)
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