SILENE (syn Agrostemma, Lychnis, Viscaria etc.)

cross-posted from Ask a Question forum ( The thread "Silene coeli-rosa 'Blue Angel'" in Ask a Question forum :

I have had difficulty finding seeds for this plant under the above name, and to see a cascade of blue down our slope from Blue Angel is a major garden wish of mine.

Evidently, this plant might be currently sold under different names. Is it possible that Silene coeli-rosa is the same as the following possible synonyms? -
-- Agrostemma githago
-- Lychnis githago
-- Silene githago
-- Viscaria oculata

????

There also seem to be quite a few other names that also may be this same plant. See http://www.theplantlist.org/tp...

and See http://www.theplantlist.org/tp...

Have all these names applied to Silene coeli-rosa at one time or another? Which one is currently accepted?

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It has also been known as Corn Cockle - possibly a wildflower found in European fields of grain and much loved especially in childrens' gardens
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ps - in my search for Agrostemma githago, rendered in a painting, I found a publication (exhibition catalog?) entitled Gardens of the Gods, by Jean Cotelle 1646 - 1708 - [url=file:///home/chronos/u-aadcbdbf212cd7d77806f72d05cc503ff806d20e/Downloads/press_kit.pdf]file:///home/chronos/u-aadcbdb...[/url]

Now, who would have thought to find Agrostemma githago in those fancy, humongous gardens at Versailles in the 17th century? The website shows this corncockle in a diagram (said to be a summary for upper parteres) for a blue garden, growing among:

Delphinium pacific 'Giant Black Knight'
Salvia guaranitica 'Black and Bloom'
Limonium sinuatum 'Royal Dark Blue'
Salvia farinacea 'Victoria'
Salvia uliginosa
Salvia patens 'Blue Angel'
Alstroemeria alba
Antirrhinum 'Rocket' ff Blanc
Cosmos blanc*
Agrostemma githago *Ocean Pearl* (Silene coeli-rosa currently accepted)
Ageratum Mexico blanc
Cosmos rose**
Lobelia x speciosa *Starship Deep Rose*
Ageratum Mexico rose
Astrantia major *Rosea*

Have fun.

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pps - An inexpensive source of bulk seeds for this plant under the name of Viscaria oculata 'Blue Angel' is at www.outsidepride.com - https://www.outsidepride.com/s...