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'Rosa pimpinellifolia L. synonym' rose Reviews & Comments
Discussion id : 145-579
most recent yesterday HIDE POSTS
Initial post 3 days ago by thebig-bear
Does anyone know whether R. Spinosissima is self-sterile? And are the garden hybrid varieties also self-sterile?

I have seen this mentioned in an article I was just reading, and was left curious, especially as my pink garden variety rarely produces hips for me, despite flowering prolifically.

The article in question is "Durham Wild Roses" by J. W. Heslop Harrison, for those that are interested.

Many thanks in advance.
Reply #1 of 2 posted 2 days ago by Plazbo
Likely varies to some degree with species from one individual to another, some being better hip parents than others.

I have an unknown white (someone bought an old place and no labels and I got a sucker...I don't recommend sticking a spino sucker in the ground, spreads) spinosissima, assume just straight species given all it's habits and traits.

It doesn't set a huge number of hips (maybe half of flowers) but it sets them. Of those that germinated, many of them seemed like straight spinosissima (no others in the garden at that time except the diploid pimps like hugonis on the other side of the garden), while others were obvious hybrids with things near it.

in the references there's one "Cross- and self-compatibility in various species of the genus Rosa"

which says
"R. spinosissima L. Ploidy, Ploidy 4x
Pollen fertility 97.7%
Selfed Fruit set 75.8%
Selfed Seed set 58.7%"

which isn't too far off what I'm seeing with mine (just less hip set)

Meanwhile at a public garden nearby there is plants of Single Cherry (and something labeled Single Purple) that produce a lot of hips. Seedlings from those show no obvious hybridity but who knows if they are self or just crosses between the two.
Reply #2 of 2 posted yesterday by thebig-bear
Great answer. Very interesting stuff. Thank you.
Discussion id : 132-580
most recent 27 APR 22 HIDE POSTS
Initial post 27 APR 22 by Dane Germeys
bloom: once-blooming spring or summer is incorrect.
In Flanders, this rose blooms very early, from May on and can continue for a long period. In September-October, there often is a rebloom.
Prone to rust.
Discussion id : 64-974
most recent 30 JAN 20 SHOW ALL
Initial post 10 JUN 12 by SteffenAlbrecht
The description says "pink and yellow". But as all the photos show, this rose is white.
Reply #1 of 1 posted 30 JAN 20 by CybeRose
White is the typical color of the Scotch rose, but color variants turn up ... or so I've read.

Sabine (1822) gave an account of the origin of the first double Scotch roses in assorted colors.

I am indebted to Mr. ROBERT BROWN, one of the partners of the firm at the above period, for the following account of their origin. In the year 1793, he and his brother transplanted some of the wild Scotch Roses from the Hill of Kinnoul, in the neighbourhood of Perth, into their nursery garden: one of these bore flowers slightly tinged with red, from which a plant was raised, whose flowers exhibited a monstrosity, appearing as if one or two flowers came from one bud, which was a little tinged with red; these produced seed, from whence some semi-double flowering plants were obtained; and by continuing a selection of seed, and thus raising new plants, they in 1802 and 1803, had eight* good double varieties to dispose of; of these they subsequently increased the number, and from the stock in the Perth garden the nurseries both of Scotland and England were first supplied.
Discussion id : 112-507
most recent 1 AUG 18 HIDE POSTS
Initial post 1 AUG 18 by JasonSims1984
So this rose is very intriguing to me, as a tetraploid, with some limited rebloom genes. I kind of feel like DNA testing is in order to find out if it is in the background of fedtschenkoana and Harison's Yellow and not the other way around.

You know? I think ancient civilization sometimes discovers these things and then is given a lot of excess credit. Then we watch Ancient Aliens shows on TV and think our distant ancestors were geniuses. Nah, we are still building McDonalds and electing Donald Trump today. A lot of great thing are pretty much accidental.

No offense to anyone's political views. Donald Trump is plenty of fun to watch on TV. Hillary is a coockoo bird, too anyway.
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