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#1
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Dendrobium prenticei
I think I posted this last year, when it bloomed better. But the ng has been
pretty quiet, so here it is again. As described below, it'sa very variable species, but this is one typical leaf shape and flower marking. There is debate over the taxonomy of this plant, along with the closely related species of D. lichenastrum & D. toressae. All have flat to terete leaves, with no pseudobulbs. The blooms of toressae are noticeably different from the other species. Those of lichenastrum & prenticei are both quite variable, but both vary in the same range of ways - and it's really only the small button shaped leaf of lichenastrum that distinguishes it from prenticei, the leaves of which are more elongated (length quite variable between plants), and anything from flattened to terete. And all variations between those extremes. If one accepts them as Dendrobes, all three species are usually assigned to Section Lichenastrum. Another school of thought ascribes then to the genus Dockrillia - understandable since the Dockrillias all have more or less fleshy leaves but no pseudobulbs. David Jones, in his 2006 book, defined a new genus, Davejonesia, to contain prenticei & lichenastrum, breaking D. prenticei into two species based on the extremes of leaf shape: Davejonesia prenticei having longer cylindrical to terete leaves, and Davejonesia auranticopurpurea having shorter flattish leaves. But he left D. toressae out of this genus completely, assigning it to the monospecific genus Stilbophyllum (toressae). Debate, anybody? I'll listen with interest! Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#2
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Dendrobium prenticei
Interesting little thing, isn't it? I don't have the expertise to comment on
the taxonomy, I'm afraid. Diana "Dave Gillingham" wrote in message ... I think I posted this last year, when it bloomed better. But the ng has been pretty quiet, so here it is again. As described below, it'sa very variable species, but this is one typical leaf shape and flower marking. There is debate over the taxonomy of this plant, along with the closely related species of D. lichenastrum & D. toressae. All have flat to terete leaves, with no pseudobulbs. The blooms of toressae are noticeably different from the other species. Those of lichenastrum & prenticei are both quite variable, but both vary in the same range of ways - and it's really only the small button shaped leaf of lichenastrum that distinguishes it from prenticei, the leaves of which are more elongated (length quite variable between plants), and anything from flattened to terete. And all variations between those extremes. If one accepts them as Dendrobes, all three species are usually assigned to Section Lichenastrum. Another school of thought ascribes then to the genus Dockrillia - understandable since the Dockrillias all have more or less fleshy leaves but no pseudobulbs. David Jones, in his 2006 book, defined a new genus, Davejonesia, to contain prenticei & lichenastrum, breaking D. prenticei into two species based on the extremes of leaf shape: Davejonesia prenticei having longer cylindrical to terete leaves, and Davejonesia auranticopurpurea having shorter flattish leaves. But he left D. toressae out of this genus completely, assigning it to the monospecific genus Stilbophyllum (toressae). Debate, anybody? I'll listen with interest! Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#3
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Dendrobium prenticei
I guess all I was doing really was highlighting just how confusing taxonomic
reviews can get - like the recent discussion about some of the Cattleya alliance. Not to mention, how confused (& cranky) I get. On Sat, 8 Sep 2007 15:09:05 -0400, "Diana Kulaga" wrote: Interesting little thing, isn't it? I don't have the expertise to comment on the taxonomy, I'm afraid. Diana "Dave Gillingham" wrote in message .. . I think I posted this last year, when it bloomed better. But the ng has been pretty quiet, so here it is again. As described below, it'sa very variable species, but this is one typical leaf shape and flower marking. There is debate over the taxonomy of this plant, along with the closely related species of D. lichenastrum & D. toressae. All have flat to terete leaves, with no pseudobulbs. The blooms of toressae are noticeably different from the other species. Those of lichenastrum & prenticei are both quite variable, but both vary in the same range of ways - and it's really only the small button shaped leaf of lichenastrum that distinguishes it from prenticei, the leaves of which are more elongated (length quite variable between plants), and anything from flattened to terete. And all variations between those extremes. If one accepts them as Dendrobes, all three species are usually assigned to Section Lichenastrum. Another school of thought ascribes then to the genus Dockrillia - understandable since the Dockrillias all have more or less fleshy leaves but no pseudobulbs. David Jones, in his 2006 book, defined a new genus, Davejonesia, to contain prenticei & lichenastrum, breaking D. prenticei into two species based on the extremes of leaf shape: Davejonesia prenticei having longer cylindrical to terete leaves, and Davejonesia auranticopurpurea having shorter flattish leaves. But he left D. toressae out of this genus completely, assigning it to the monospecific genus Stilbophyllum (toressae). Debate, anybody? I'll listen with interest! Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#4
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Dendrobium prenticei
Hi Dave
I tend to follow the more experienced growers at my ANOS group. If they start using Jones's new names then I figure that they must have agreed to the nomenclature change. I share your frustration with the changes especially seeing there have been so many name changes to Australian orchids. Cheers John "Dave Gillingham" wrote in message ... I guess all I was doing really was highlighting just how confusing taxonomic reviews can get - like the recent discussion about some of the Cattleya alliance. Not to mention, how confused (& cranky) I get. On Sat, 8 Sep 2007 15:09:05 -0400, "Diana Kulaga" wrote: Interesting little thing, isn't it? I don't have the expertise to comment on the taxonomy, I'm afraid. Diana "Dave Gillingham" wrote in message . .. I think I posted this last year, when it bloomed better. But the ng has been pretty quiet, so here it is again. As described below, it'sa very variable species, but this is one typical leaf shape and flower marking. There is debate over the taxonomy of this plant, along with the closely related species of D. lichenastrum & D. toressae. All have flat to terete leaves, with no pseudobulbs. The blooms of toressae are noticeably different from the other species. Those of lichenastrum & prenticei are both quite variable, but both vary in the same range of ways - and it's really only the small button shaped leaf of lichenastrum that distinguishes it from prenticei, the leaves of which are more elongated (length quite variable between plants), and anything from flattened to terete. And all variations between those extremes. If one accepts them as Dendrobes, all three species are usually assigned to Section Lichenastrum. Another school of thought ascribes then to the genus Dockrillia - understandable since the Dockrillias all have more or less fleshy leaves but no pseudobulbs. David Jones, in his 2006 book, defined a new genus, Davejonesia, to contain prenticei & lichenastrum, breaking D. prenticei into two species based on the extremes of leaf shape: Davejonesia prenticei having longer cylindrical to terete leaves, and Davejonesia auranticopurpurea having shorter flattish leaves. But he left D. toressae out of this genus completely, assigning it to the monospecific genus Stilbophyllum (toressae). Debate, anybody? I'll listen with interest! Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
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