This plant in the papyrus family reproduces itself freely, which leads to
many babies in my flower beds. I then transplant said seedlings to any place
that tends to get waterlogged in the rainy season.
Nothing scientific, just a sense that papyrus grows near water, and I have areas with bad drainage, so I am trying to make the best use of challenging areas in my garden.
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This Eryngium, or Sea Holly, also reproduces freely – almost too freely for me.
I mean, it grows well, is deer and rodent resistant, and I am still looking for where to move it so it won’t poke me while I weed around it.
I cut some of the ‘flowers’ and laid them in a cool, dark area to dry, just in case they might look good in another season. Chances do not look good, as I found the stems to be hollow, which is not a characteristic of any other flower that dries well.
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A visitor to my garden recently asked me about this ‘flower’. These are seedpods of a spring flowering daylily. No flower here! When the stems turn brown they pull away easily, so I wait a few months, and it is one less plant to deadhead.
susansflowers 
July 6, 2016 at 5:07 pm
My Sea Holly, Amethyst (Eryngium) is blue and the leaves appear different. I will take a picture and post on Facebook.
July 10, 2016 at 5:50 am
I checked your page, and have not seen your photo yet.
I could be wrong about the name, because I looked at photos online to find the name of my plant.
There could be different varieties of the same plant.
We’ll have to investigate this!