"Anne Hedden" wrote in message
...
Looking for very small, very light plants, nothing over 1 inch in height or
width at maturity, or very light mosses. Any and all suggestions very
welcome. Beauty is important but not necessary. Must be able to grow these
plants hydroponically in styrofoam.

Sounds like you need to get in touch with NASA :~)

If anyone knows of an online source that arranges plant life by height and
weight (accurately speaking, most sites are very, very wide ranging in what
they consider to be a 'small plant'), I would be incredibly grateful. Are
there any e-Businesses that specialize in wee, teeny plants?

There are very few plants that will fit your bill. Moss seems to me to be the
only possibility:
Jenny