HelpMeFind Roses, Clematis and Peonies
Roses, Clematis and Peonies
and everything gardening related.
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?
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.
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.
most recent 26 JUL SHOW ALL
Initial post 12 APR 09 by billy teabag
I have heard reports of plants of 'Lady Hillingdon' labelled 'Lady Plymouth', and this photo looks like 'Lady Hillingdon'.
Reply #1 of 6 posted 12 APR 09 by jedmar
Can be. A lot of Teas at Sangerhausen are mislabeled. We need a picture of the real 'Lady Plymouth' to compare.
Reply #2 of 6 posted 13 APR 09 by billy teabag
Wish I had one to share but so far no joy in that quest.
Reply #3 of 6 posted 13 APR 09 by billy teabag
Is there a photo with the description in the 1920 Edition of Captain Thomas's book 'The Practical Book of Outdoor Rose Growing'?
I have the 4th edition but Lady Plymouth isn't in that one.
Reply #4 of 6 posted 14 APR 09 by Cass
No photo, Billy. The 1920 edition is on google books.
Reply #5 of 6 posted 15 APR 09 by billy teabag
Thanks Cass
Reply #6 of 6 posted 26 JUL by HubertG
I just uploaded an old photograph of 'Lady Plymouth' for comparison. The form looks like the other photograph here, although the colour doesn't really match early descriptions.
most recent 10 JUL HIDE POSTS
Initial post 10 JUL by Charles Quest-Ritson
The flowers should be semi-double.
Reply #1 of 1 posted 10 JUL by Cass
A newer photo on the website does show more petals than the original photo. Semi-double seems a more accurate description.The photo posted here was supplied by Poulsen. The current Poulsen's website describes the flower as single but the number of petals as less than 15.
most recent 12 MAY SHOW ALL
Initial post 1 MAY 09 by Cass
Has anyone compared Prof. Ganiviat to the rose in commerce in the USA as Archduke Charles? As a young plant, the rose in commerce as Archduke Charles was vaguely credible as a china, primarily because of the scent of the blooms, which is like cherry candy. The blooms color is very distinct: lighter at the center, with lovely deeper red outer petals, the whole bloom aging to deep carmine red. Here's a one in a thousand:

But this spring it shot up a stout, thick, five foot/ 1.5m basal topped by a typical Tea inflorescence. It's armed with red prickles on new wood. In old cemeteries, it is very upright. I posted a huge image of that basal which, because it's so large, shows the shape of the buds and inflorescence (I planted the rose too close to Lavender Dream, which is the other foliage you see in this image.):

The leaflets are rounded, shiny, leathery and large - - one is almost 4 inches/10cm - - and rather modern looking.

I've confirmed that Professeur Ganiviat was introduced into commerce in the USA in 1891.
Reply #1 of 2 posted 19 AUG 12 by Geoff Crowhurst
This seems to be the same rose that has been called Princesse de Sagan in Australia for some time. I have seen very old plants growing in the Kew Cemetery in Melbourne, where it has grown to well over 6 feet in height, and about the same in width. One was cut down quite hard last season, but the plant responded surprisingly well, and bloomed exceptionally in late autumn. The leathery foliage looks as if survives our occasional scorching days in summer without trouble. The flowers last well when cut. It also strikes well from cuttings, so all in all seems a very desirable rose. I can't see how it has been called a China rose.
Reply #2 of 2 posted 12 MAY by Aussie rose lover
Yes I ha e noticed that confusion over names too.Both are exceptjo ally beautifully roses and
are on the opposite ends of the red spectrum.They deserve to grown and known by their real names.
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