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Post by Dave Evans on Feb 10, 2011 23:11:49 GMT
Excellent topic gentlemen! I've been following the thread with great interest. Also, we should have some interesting results coming soon from an ICPS funded Sarracenia genetics study at University of S. Alabama. Having studied the same anomalies of said topic in the field for quite some time, I have run across the instances spoken of here on many occasions. Take for instance at this well-known site of Sarracenia flava var. atropurpurea. One can many specimens that almost seem "stuck" in between the heavily-veined forms and the all red forms somewhat. Also, one will see the plants that are completely blood-red including the lid mixed throughout the colony. Dear Brian, I would say this is a stand of S. flava var. rugelii and rubricorpora.
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john
Full Member
Posts: 30
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Post by john on Feb 11, 2011 23:06:11 GMT
Thanks for the pictures Brian. In the picture of the S.flava are all of the green tubed plants rugelii? (Just interested in the way these phenotypes occur in populations).
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Post by Brian Barnes on Feb 15, 2011 15:39:30 GMT
Hi John, Yes there are the S. rugelli forms present, but also the heavily-veined forms as well. Upon visiting the site, one can actually see what appears to be a transistion from S. flava rugelli into heavily-veined forms of varying degree, to the red forms with yellow lid, then to all-red nigrapurpurea forms. IMO, either a population of different Sarracenia species...or a fantastic example of interspecies transition Happy Growing, Brian
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Post by DroseraBug on Mar 1, 2011 4:58:53 GMT
My opinion. Inter and intraspecies variation to an extreme extent and beautiful photos Brian. Wouldn't intraspecies variation occur more commonly yet plants are also expressing interspecies characters in some cases? From my observations in the Green Swamp and elsewhere there are S. flava var. cuprea (coppertop), var. ornata, rugelii, various mixtures of rugelii and and all of the above and so on. Every Sarracenia flava is different. Sarracenia genetics are highly complicated. I've seen plants with ornata-like veinage extending and coalescing with dark maroon throats into the lids. There are relict or isolated populations such as sandhills, NC rubras that I've yet to see any research on. These plants have been isolated from the mountains and coast for who knows how long? This thread presents good questions. My hypothesis is whether it be glacially, geographically, or climatologically, the earth's Sarracenia diverged either slowly or quickly with bot inter and intra-species variation playing roles; and genetically are highly complex similar to that observed and maybe more than oak trees. In some cases, there are no positive IDs on S. flava and other species, especially if several characters occur with one plant morphologically and locally or if your geographically in a transitional zone. Similar taxonomic variation occurs in entomology with much variation within one species to the point where insects are let at the Genus level if taxonomic literature does not lead to a positive ID. I've yet to come across a more interesting plant group although I am biased. I'll be interested to see the outcome of this topic of research and am sure it will provide answers.
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