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Re: Amano Pearl Grass
Immediately after I sent my sharp message about casually assigning species names to plants, I felt bad. But that was before I read Dwight's dribble.
Regarding the different plants in the hobby, Dwight's list simplifies to three because Hemianthus micranthemoides is the new name for Micranthemum micranthemoides (as per Kasselmann and others). BTW, I think the "Amano 2-leaved pearlgrass" may be the same plant which is pictured in the Dennerle catalog as Micranthemum sp. And I agree with Youngker that there are other differences between umbrosum and the other Hemianthus - besides leaf shape. One other notable difference is color.....umbrosum has a nice bright green color compared to the darker green color of the others (which can be seen when they are grown together).
NF
From: Dwight <boukmn at mindspring_com>
>1. Hemianthus micranthemoides ..... 3-4 leaves per node
>(never seen a plant like this as you described it)
>2. Micranthemum umbrosum .......... 2-LARGE distinctly shaped
> leaves/node. (NAW bk#2 pg 45)
>3. Micranthemum micranthemoides ...... 3-4-Leaves per node
>(NAW bk#2 pg 45)
>4. Micranthemum micranthemoides var. Pearlgrass? ...... 2-small, elongatedleaves/node.