They grow really slowly. I have had a small bunch for years. I still have a small bunch.
LOL! I was too! I didn't know it until I got some c. Parva from BigStick today. I had to pm him a px of my Crypt. He said it was Crpyt. x willisii 'lucens' which is the NEW name for Crpyt. Nevilli. TOO FUNNY! [smilie=l:Ok, it turns out I have been talking about C. nevelli which is a tough plant. C. parva, the smallest known crypt grows like a weed for me in non-co2 but with a rich substrate.
Of course it doesn't help that in my own pages I've put a parva plant image on the nevilii page.
I go fix now. And look for my pic of the real nevilii. Arg.
Here is a px of both in my tank. Both are small as you can see they are beside Ranuculus inundatus.The one in the oval is what BigStick IDs as Crypt x willisii 'lucens'.Hmmm, now I'm wondering what the heck I have.