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  #11  
Old 06-01-2014, 11:42 PM
james mickelso james mickelso is offline
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Yeah what he said.
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  #12  
Old 06-03-2014, 09:12 PM
HighSeas HighSeas is offline
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What happened to my petiole.
Did the petiole get yanked off?
What petioles still exist, I don't know.
The petiole just wouldn't come off.

oh...sorry. Practicing.

Thanks for the info!
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  #13  
Old 06-15-2014, 05:14 PM
merkity merkity is offline
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I have the perfect example of what you find when you remove the petioles... There are two flower stems at top currently growing, a bright green spot where I broke a potential root off when pulled off that petiole, several black tipped roots, and near the base on the right side, what looks like another flower spike, and on the left side just above the spike is possibly another one - doesn't look like a root. So we will see what starts growing - also looks like its time to fully repot and trim this guy. ( this is my little monster with the 2-3 ft roots...
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  #14  
Old 06-15-2014, 06:01 PM
Optimist Optimist is offline
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Petiole. I have found the most popular baby name of 2015!
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  #15  
Old 06-15-2014, 06:33 PM
MattWoelfsen MattWoelfsen is offline
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It seems to me that petiole occurs on all orchids. I see the same material on my Oncidium, Cattleya, and Dendrobium plants. The Japanese have a name for this material too. They call it "Tsuke".
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  #16  
Old 06-15-2014, 07:28 PM
Hiester Hiester is offline
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I'm thinking this is becoming somewhat confused, as orchids belong to the monocots, therefore many orchids demonstrate a somewhat characteristic lack of a leaf petiole, instead being attached directly to the stem of the plant. Monopodial orchid leaves very often have what is termed a sheath (just like the protective sheath typically seen in a Cattleya and other orchid flower inflorescences) as part of the leaf, and which attaches to the stem, but this is different from a petiole, which is a typically slender projection from the stem which at its end bears a leaf, or leaflets. When a single leaf grasps the stem of the plant directly, generally encircling the stem, and lacks a petiole, it is classified as sessile and not petiolate.

Leaves have an abscission zone, most often containing a differentiated abscission layer but sometimes this layer is lacking, where dying and dead leaves loosen and fall from the plant. When the abscission layer is lacking the leaf simply remains on the plant until it rots away. Orchids can be in either of these groups.

Stanhopea would be one typical example of an orchid genus whose members often bear a leaf petiole.
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Last edited by Hiester; 06-15-2014 at 07:57 PM..
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