Thanks for the new pics Tex Gal. I agree with Cavan that the last picture from your original post is probably a chain sword of some type. The latest picture you posted of the Hygrophila species definitely without a doubt affirms that it is Hygrophila sp. 'Bold'.
The Hygrophila sp. 'Bold' and Hygrophila sp. 'Tiger' names come from Japan. I originally obtained them from a friend in Hawaii who regularly travels to Japan and brings back plants. I introduced them to the members at APC and TPT a little over a year ago. I'm quite certain as to the identification of Tex Gal's plant based on those names that were passed on to me. Granted, they both have real species names that have yet to be determined.
Now to address the whole dwarf Hygrophila dilemma. There are currently 3 species of Hygrophila that are being sold and traded as Hygrophila sp. 'Dwarf'. This has no doubt been the source of much confusion.
1) Hygrophila sp. 'Low Grow' (aka Hygrophila sp. 'Dwarf') or at least that's the name we've given it in my local club. It grows more recumbent to the ground than vertical and slowly forms a nice bush. Leaves are slightly bullate and about 3-4" in length. This species was brought back by Mike and Jeff Senske from Japan a couple of years ago and has been making it's way around thanks to their generosity to the Houston club.
Here's a picture of it in one of Mike Senske's aquascapes or
here in an aquascape by Ghazanfar Ghori (the person in my club that I got it from). Keep in mind that Ghazanfar's tank is a 215 gallon tank.
There are some, including myself, who now believe this to be the plant sold by Tropica as Staurogyne sp. which is a very close relative of Hygrophila species. You can read more about it on Tropica's website
here.
2) is Hygrophila sp. 'Porto Velho' (aka Hygrophila sp. 'Dwarf'). 'Low Grow' and 'Porto Velho' are distiguinshable by size and leaf texture. The 'Low Grow' has a considerably larger leaf that is slightly bullate. Like 'Low Grow', 'Porto Velho' will also grow in a recumbent fashion along the substrate to form a nice foreground or midground bush if given enough light. The leaves of Hygrophila sp. 'Porto Vehlo' are about 2" in length and are not bullate at all.
3) is Hygrophila sp. 'Dwarf'. This was first distributed by Robert at Aqua Botanic a little while ago. This species has long slender leaves that are quite wavy.
Here you can read more about it.
I am currently keeping all 3 of the species of "dwarf" Hygrophila and can say without a doubt that all are easily distinguishable from each other. Again, I believe the confusion can stop is we stop calling all 3 of them Hygrophila sp. 'Dwarf'.
It's also an excellent idea to keep a journal of the species you've collected as Tex Gal has done. It's very easy to start confusing similar species as your collection gets larger and larger.