It's a Geodorum, probably G. densiflorum which is a very widespread species, or maybe G. recurvum.There are about a dozen Geodorum species with quite a few of them found in China.

Posted by tropicbreezent (My Page) on Tue, Jun 4, 13 at 5:34

Thank you so much for your ID. I think you are absolutely correct. Are they terrestrial?

Yes, they are terrestrial. The G. densiflorum is a native here also. Ours was Geodorum neocaledonicum for a long time but was more recently moved to densiflorum.

They're common everywhere they occur. On my place they come up like weeds. I moved a lot of them a few years back to put them in a garden bed out of the way. Now they're all over the place again. The seed disperses with the wind. They're deciduous, die back to the tubers in the dry season.

There's a few slight colour variations in different localities, even close by ones. Mine are more pink than the ones in your photo