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Salix
most recent 14 NOV SHOW ALL
 
Initial post 19 NOV 14 by Salix
The pigments were found very similar to R. foetida.

http://bulbnrose.x10.mx/Roses/breeding/EugsterCarotene1991/EugsterCarotene1991.html, table 4, note [i].
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Reply #1 of 3 posted 5 NOV by CybeRose
How clever of you to catch that. :-)

However, they actually wrote: "R. foetida persiana and R. ecae show practically identical results."

This may be hair-splitting, but I have been told that 'Persian Yellow' is a triploid, unlike R. foetida.
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Reply #2 of 3 posted 14 NOV by Nastarana
In the description is:

Botanists have since determined that the two species are either distinct species or different varieties of a single species.

Could someone please explain. What does that mean?
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Reply #3 of 3 posted 14 NOV by jedmar
This is indeed a bit confusing. Rosa xanthina Hook.f. is not the Rose we generally know as Rosa xanthina Lindl. In Curtis's Botanical Magazine of July 1, 1899 there was a description of a "Rosa xanthina" which was pictured and named as the latter with the statement:
"The specific name Ecae is derived from the initials of Mrs. Aitchison's name, given before the plant was identified with Lindley's Rosa xanthina. The specimen figured is from a plant raised at the Royal Gardens from seed sent by Dr. Aitchison in 1880."

However, it was later apparently concluded that this description was not of R. xanthina Lindl. as claimed, but a different species. In that case, the name Rosa ecae Aitch. which had already been published 1880 had again priority and was valid. I have modified the note to "distinct species" only.
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most recent 9 NOV HIDE POSTS
 
Initial post 8 NOV by Marnix
It can be higher than the description, 2 meter is not a problem here :-D Rebloom is very good when not pruned, becouse the new groth starts directly beneath the flower. But when you let it grow, it will be an upright Rose with strong canes. The canes are not leaning, so it is a very small Rose. I planted 3 of them together to get more body at the bush.
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Reply #1 of 3 posted 8 NOV by Marlorena
I didn't like this rose and I'm glad I got rid of it... tall, coarse and very thorny.. the flowers are nice when they open but quickly develop a grey colouration on the outer petals, which made me think of a young man with grey hair much too soon in life.. and then they turn a manky purple grey...
It was an exceptional bloomer though, I got 5 flushes in a good season, continuous flowering..

I do hope you are happy with yours and that it continues to do well for you...
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Reply #2 of 3 posted 8 NOV by Marnix
Now I am laughing. The aspects you describe as not-nice are very nice to me. I like the silver on the flower, the strong, colored prickles and the purple canes! But lucky there are much more Roses on this world to choose your own favorites ;-)
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Reply #3 of 3 posted 9 NOV by Salix
To me, the blooms resemble very oddly colored peonies!
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most recent 23 OCT SHOW ALL
 
Initial post 14 MAY 10 by Cass
Does anyone know if Rosa gymnocarpa is alternate bearing, i.e. flowers and bears fruit heavily one year, followed by one or two years of very light flowering and fruiting?
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Reply #1 of 2 posted 11 JAN 15 by Salix
I think it does- I read it somewhere... It could just be a climate thing.
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Reply #2 of 2 posted 23 OCT by Michael Garhart
Its native here. Even if it was alternating, it would be hard to tell, because the years are either very dark and rainy or temperate and warm. And even then, it's not an abundant producer. Both pisocarp and gymnocarpa seem to gravitate more towards being a niche forest rose, where they can survive for long lengths in low-light, crowded situations, and repeated maulings by elk and similar. You often see them near native huckleberries, or in depressions with water where other short plants are less competitive for space. Every once in a while, you will find one in a ditch or edging toward a body of water.

They're great at surviving and letting animals spread their seed! Rather poor at anything ornamental.

They can get powdery mildew, depending on the scenario, but I have never seen downy on one. Which struck me as interesting, because the short native species (californica's kin) in california can be very prone to downy. As for blackspot, its hard to tell, because they're often in moisture dense areas, and its often dark, so it's hard to see where its bs, anthracnose, or cercospora, which tend to look alike in certain weather and unalike in other weather. I imagine their bs resistance is simply average, if I had to guess.

I don't see moss balls on them, like I do naturalized canina. I don't see raspberry cane pests or aphids on them, either. Not that they couldn't be targeted. I have just never seen it. I think it's because other hosts are better targets, like woodsii and himalayan blackberry.

edit: I forgot to add: They all rust. All of the natives from Oregon to B.C. rust. Gymnocarpa, Woodsii, Acicularis, Pisocarpa. All of them rust. Acicularis being the worst. They will put acicularis in Wal-Mart parking lots (don't ask me why... probably conservation rules), and you will see orange streaks where the rust tends to ball up in one section of the plant. It's amusing, but a little weird.
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most recent 22 OCT HIDE POSTS
 
Initial post 22 OCT by Plazbo
In it's second year now and it has exploded in blooms.
Just random observations.
There was a minor to bad bout of powdery mildew (primarily around flower buds), but no other health issues so far.
Every flower seems to set a hip, the hips only have 1 or 2 seeds each....getting the seeds out of the tiny hips is a little tricky. Seeds germinate fairly well.
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Reply #1 of 1 posted 22 OCT by Salix
From personal experience, if you want somewhat greater seed set pollinate several times. I usually do a whole truss, so the low seed count is not too much of an issue.
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