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pkalisz
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I have a large patch of species roses derived from cuttings taken from wild plants of R. carolina and from an R. palustris plant purchased from a NC garden. They were placed on opposite sides of a wet drainage area but have since blended together. I was initially surprised that R. carolina seemed to more vigorously invade the wet area through suckers than did R. palustris. My question now is how to tell the species apart as they are very much alike in terms of appearance of stems, leaves, flowers, hips and prickles; phenology; size; etc. "Plant Life of Kentucky" by Ron Jones separates them by 5-7 leaf teeth per cm that are 1 mm high (R. carolina) versus 9-11 teeth per cm that are 0.5 mm high (R. palustris). This is not working for me. I would appreciate any suggestions or insights as to how these two species may be distinguished.
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#1 of 2 posted
2 NOV 18 by
jedmar
There is a key to American species in Flora of North America: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=318049
Comparing R. palustris (11) with R. carolina (13): R. palustris: Terminal leaflet margins...serrulate; teeth 20-30 per side; auricles erect, rarely flared... R. carolina (and R. foliolosa & R. virginiana): Terminal leaflets margins serrate, 8-18(-23) per side; auricles flared...
Now this needs some graphics. See here: https://eflora.library.sydney.edu.au/glossary/image/ It means that R. palustris leaves have very fine teeth on the edges, R. carolina maybe half as many.
The auricles refer to where the leaf is attached to the stem: http://caes2.caes.uga.edu/commodities/turfgrass/georgiaturf/Turfgras/1130_DiagramParts.htm
Hope that helps.
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#2 of 2 posted
2 NOV 18 by
pkalisz
Thanks, jedmar. Based on this key all my plants are R. carolina; the plant I purchased as R. palustris must have been mis-labelled. What I find interesting is that the R. carolina is aggressively spreading into a wet drain occupied by Southern Cattail (Typha domingensis Pers.) and other wet site species. It's hard to imagine that R. palustris could be more adapted to wet soils than this. I will get some true R. palustris and plant them to compare. I appreciate your help. Paul
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Under "description" of Brother Cadfael at bottom the following link no longer works: http://www.nsac.ns.ca/nsac/ps/annual96/mapple.htm
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Thank you for the advice. We have deleted the link.
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Charles Quest-Rison. Climbing Roses of the World, p.135. "It is ironic that the most successful seedling of 'Turner's Crimson Rambler' should have been brought into this world with a false declaration of parentage. Jackson & Perkins described 'Dorothy Perkins' as a seedling or Rosa wichurana crossed by the pink Hybrid Perpetual ' Mme Gabrielle Luizet', but the similarity to 'Turner's Crimson Rambler' was noted immediately. There was lively correspondence in many horticultural journals (especially in France) which pointed out that crosses between R. wichurana and Hybrid Perpetuals had produced very different roses with much larger flowers and concluded that the similarity of 'Dorothy Perkins' to 'Turner's Crimson Rambler' was more than a coincidence... It is best to think of 'Dorothy Perkins' as the pink counterpart of 'Turner's Crimson Rambler'."
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I think Mr Quest-Ritson might be right. But it is interesting to note how the glandular pedicel, matt leaf and upright growth of 'Turner's Crimson Rambler' was subdued by R. Wichuraiana to produce a smooth pedicel*, glossy leaf and sarmentose growth in 'Dorothy Perkins'. Many thanks for adding this most interesting reference pkalisz.
(*i am sure 'Dorothy Perkins' has a smooth pedicel, but it is the wrong season for me to go and double check.)
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"Hairy" pedicels are a characteristic I use to rule out DP when trying to identify a small pink rambler.
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'Excelsa' is smooth as well. 'Turner's Crimson' has surprisingly small bristles but it is covered with them.
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Thanks to you both. I have added "smooth pedicels" to the main page for both 'Dorothy Perkins' and 'Excelsa'.
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And 'The Fairy' needs a shave.
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#6 of 14 posted
8 JUL 18 by
pkalisz
I have two rambler roses that I propagated from bushes gowing at abandoned house sites here in central Kentucky. Both of these have bristles/glands on the pedicels (hard to see in the pictures). These roses are similar but differ in gross appearance, flower color and phenology. I always suspected that the second photo is DP. However, it is possible that both or neither is DP. They may also be wild DP hybrids. (I also posted the photos with my comment of 26 July 16)
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Neither looks like DP to me. The first is too dark a color to be DP and too pink to be 'Excelsa'. The second looks like the flower is too large but about the correct color. Both are very nice roses and once they are more mature might be easier to identify. A great find!
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It might be worth looking at "Hawthorndene tennis court south rambler"for the first one, but I can't see how pale the petal reverses are. See the comparison scan of leaves of DP and "Hawthorndene".
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Nope. Not the same My Jan 2009 comment for "Hawthorndene Tennis Court South Rambler" says it has smooth pedicels.
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The rose being grown in the U.K. as 'Dorothy Perkins'. The receptacles and pedicels are smooth.
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'Excelsa', the plant on the left is from a plant 10 years old whilst the one on the right was found in a long abandoned garden. Most flowers have white streaks in their petals, the receptacles and pedicels are smooth.
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The rose I am growing as 'Crimson Shower'. The receptacles and pedicels have bristles and flowers at least a week later than Perkins.
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A found rose with smooth receptacles and pedicles.
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All four together, 'Dorothy Perkins', 'Excelsa', 'Crimson Shower', foundling rose.
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Available from - Hollingsworth Peonies http://hollingsworthpeonies.com/home
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