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#1
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A Twist
OK, you guys, wake up. I have a question. Any orchid grower will tell you that
hybrids between Sophronitis & other members of the cattleya alliance almost always have a quarter to half twist in the leaves. My experience in sewing leads me to speculate that they didn't fit the front of the leaf to the back properly. Does anybody have a botanically more correct explanation? Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
#2
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A Twist
Iris Cohen schreef
OK, you guys, wake up. I have a question. Any orchid grower will tell you that hybrids between Sophronitis & other members of the cattleya alliance almost always have a quarter to half twist in the leaves. My experience in sewing leads me to speculate that they didn't fit the front of the leaf to the back properly. Does anybody have a botanically more correct explanation? Iris, + + + Sorry not to be able to help here. My math is not up to it. PvR |
#3
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A Twist
Sorry not to be able to help here. My math is not up to it.
I'm missing something. What would math have to do with it? Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
#4
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A Twist
Sorry not to be able to help here. My math is not up to it.
Iris Cohen schreef I'm missing something. What would math have to do with it? Iris, + + + Surely math is the essential tool to describe such things? PvR |
#5
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A Twist
Surely math is the essential tool to describe such things?
You lost me. Here we have a situation where, due to a genetic quirk or incompatibility, the leaf has a twist. It looks as though the dorsal surface of the leaf does not quite fit the ventral surface properly. There is something about the growth process of the leaf which perhaps causes one surface to grow at a different rate from the other. Maybe my left brain is asleep, but I don't see where math comes in. Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
#6
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A Twist
Surely math is the essential tool to describe such things?
Iris Cohen schreef You lost me. Here we have a situation where, due to a genetic quirk or incompatibility, the leaf has a twist. It looks as though the dorsal surface of the leaf does not quite fit the ventral surface properly. There is something about the growth process of the leaf which perhaps causes one surface to grow at a different rate from the other. Maybe my left brain is asleep, but I don't see where math comes in. Iris, + + + Aren't you doing it yourself? "one surface to grow at a different rate from the other" ie two rates, in a curious relationship to each other. Rate of growth is best expressed in a mathematical formula. Two rates of growth are ... PvR |
#7
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A Twist
In article , Iris Cohen
writes OK, you guys, wake up. I have a question. Any orchid grower will tell you that hybrids between Sophronitis & other members of the cattleya alliance almost always have a quarter to half twist in the leaves. My experience in sewing leads me to speculate that they didn't fit the front of the leaf to the back properly. Does anybody have a botanically more correct explanation? Not that I think I can answer, but do you mean apical vs basal, or dorsal vs ventral? -- Stewart Robert Hinsley |
#8
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A Twist
Stewart Robert Hinsley schreef
Not that I think I can answer, but do you mean apical vs basal, or dorsal vs ventral? -- Stewart Robert Hinsley + + + Remember this is a botany newsgroup: Animals (and people) have dorsal and ventral sides. Plants don't. Leafs have adaxial and abaxial surfaces. PvR |
#9
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A Twist
"one surface to grow at a different rate from the other" ie two rates, in a
curious relationship to each other. Rate of growth is best expressed in a mathematical formula. I was afraid you were going to say that. Do you think that is what is causing the twist, that the different sides of the leaf are growing at different rates? Incidentally, It usually doesn't seem to make any noticeable difference whether the plant is diploid or polyploid. However, I have one sophro hybrid which is said to be 4.5n and has leaves like boards. The twist is there, but less pronounced. Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
#10
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A Twist
I was afraid you were going to say that.
Iris, + + + Actually I did not say that. I just said that you said it ;-) PvR |
#11
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A Twist
"Iris Cohen" wrote in message ... OK, you guys, wake up. I have a question. Any orchid grower will tell you that hybrids between Sophronitis & other members of the cattleya alliance almost always have a quarter to half twist in the leaves. My experience in sewing leads me to speculate that they didn't fit the front of the leaf to the back properly. Does anybody have a botanically more correct explanation? Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) I don't know either, but I've also seen it in my epiphronitis. Your speculation seems quite logical but why is another question. And why sophronitis? I haven't grown a pure sophronitis anything due to our hot climate, but with our recently upgraded cooling system I plan to soon. Please post if your searches turn up anything. |
#12
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A Twist
I haven't grown a pure sophronitis anything due to our hot climate, but
with our recently upgraded cooling system I plan to soon. Please post if your searches turn up anything. I have a warm plant room. The only red minicatt I can grow is Frank's Valentine, which is not terribly great. I have a magnificent Sophronitis Arizona cross, Sc. Mini Collins 'Pink Sherbert', HCC/AOS. I was told that S. Arizona is more heat tolerant than straight S. coccinea. If you have any rupicolous Laelias, you can tell people you are now growing Sophronitis. I have a Jungle Elf cross that recently reached maturity & bloomed. Sure enough, the adult leaves have that same twist. It's not the Coriolus Effect. My Frank's Valentine has some leaves going one way & some the other way. We'd better continue this off the group or in the Orchid Digest, before the rest of the botanists get after us for talking a foreign language. Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
#13
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A Twist
Iris Cohen schreef
OK, you guys, wake up. I have a question. Any orchid grower will tell you that hybrids between Sophronitis & other members of the cattleya alliance almost always have a quarter to half twist in the leaves. My experience in sewing leads me to speculate that they didn't fit the front of the leaf to the back properly. Does anybody have a botanically more correct explanation? Iris, + + + Sorry not to be able to help here. My math is not up to it. PvR |
#14
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A Twist
Sorry not to be able to help here. My math is not up to it.
Iris Cohen schreef I'm missing something. What would math have to do with it? Iris, + + + Surely math is the essential tool to describe such things? PvR |
#15
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A Twist
Surely math is the essential tool to describe such things?
Iris Cohen schreef You lost me. Here we have a situation where, due to a genetic quirk or incompatibility, the leaf has a twist. It looks as though the dorsal surface of the leaf does not quite fit the ventral surface properly. There is something about the growth process of the leaf which perhaps causes one surface to grow at a different rate from the other. Maybe my left brain is asleep, but I don't see where math comes in. Iris, + + + Aren't you doing it yourself? "one surface to grow at a different rate from the other" ie two rates, in a curious relationship to each other. Rate of growth is best expressed in a mathematical formula. Two rates of growth are ... PvR |
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