I also wanted to pipe in and say that JustOneMore20 seems to have hit it right on the head.
these (E. parviflorus "tropica") are a great plant that is easy to grow. Talking to some other growers, it seems they can get 6" or so accross. The leaves while usually dark green, can get some "red" if under very high light.
The story is, that when Tropica was shipping this plant from one nursury to another, it simply started growing "small". The entire species was propaged from that incedent, and the size breeds true. I have always noticed how twisted the leaves look, almost as if they were meant to be bigger but are being held back.
These plants are in 3 of my tanks:
1- High light (5.4wpg) CO2, ADA soil, soft water (1-2Kh) - here they grow pretty fast, and plantlets are always shooting up.
2- Med light (2.3wpg) no-co2, no ferts (other than fish), tap water. I grow the plantlets in here prior to selling them. Decent growth. The color is not as dark of a green
3- Med light (2.4wpg) no-co2, no ferts, ultra hard water (shrimp tank), here the sword grows in the shade of a Tropica Marble Queen. Groth rate is non-existant. The plant does stay healthy and green.
My point being, that I think these plants will grow/survive in a very wide range of conditions.
Here are a few pics of this plant from my tank:
http://webpages.charter.net/zezmo/E_Parva_Tropica-1.JPG
http://webpages.charter.net/zezmo/E_Parva_Tropica-2.JPG
http://webpages.charter.net/zezmo/E_Parva_Tropica-3.JPG
http://webpages.charter.net/zezmo/E_Parva_Tropica-4.JPG