ID this Eleocharis Parvula like Mystery Grass - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 07-20-2007, 09:06 PM Thread Starter
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Question ID this Eleocharis Parvula like Mystery Grass

OK, here's one for you serious plant experts out there.
I'm using a 2" paper clip to help you judge size and scale.
Any educated guess to what this long stuff could be?

I have been growing a sample of Eleocharis parvula I got from Wolf 6 Months ago.
It grows painfully slow, but it will eventually make a nice uniform grass carpet
if I space out the plantlets every few Months.



I got another grass sample a few weeks ago that I collected in a NJ stream.
It's root system and blades look EXACTLY like EP, however it spreads much
faster than EP and unlike EP, does not stop growing tall at 2" in my tank.

This Jersey grass grows at EP's density, but set it apart to aid it's spread.

I do not think this is an immersed grass, as
this is soft and there is no sign of plant rot.
sorry about my lousy 3mp camera reflections

Notice how EP curves in a slight arc, while
the Jersey grass grows into a slight spiral,
which sways gently in my water current.

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post #2 of 9 (permalink) Old 07-20-2007, 10:15 PM
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Don't have a clue, but its cool looking. Where about did you get it? What stream/river?

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post #3 of 9 (permalink) Old 07-21-2007, 01:53 PM Thread Starter
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we were in one of those rambling streams that turn into rivers that ultimately run into the ocean.



out of 10 plant samples; 7 melted in my tank, 2 are immersed, but this long thin grass thrives.



the water was under a foot deep, and the substrate was yet another foot of thick brown muck.






Last edited by spypet; 07-28-2007 at 01:47 AM.
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post #4 of 9 (permalink) Old 07-21-2007, 05:57 PM
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my Ep grows with more arc, they're bending almost towards the substrate. the long one is weird looking, i've seen one similar but longer from another forum :


oh and here's a discussion in my native language about native plants, with lots of photos
http://forum.o-fish.com/viewtopic.php?t=18900

credits goes to thread and photos owner
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post #5 of 9 (permalink) Old 07-21-2007, 08:01 PM Thread Starter
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ikuzo, thanks for posting something similar you have seen on a forum I would otherwise never notice. this Jersey grass grows differently in two ways. the blades have a very uniform fine thickness, and about 8 blades come out of a root, while additional blades spread to a new rooted plant by short runner. I don't think this Jersey grass is a Spikerush like EP, as it lacks enough rigidity to break the surface to flower and seed. I'll know for sure in a few weeks when it hits the water surface where I'm sure it will simply bend along the current below just parallel to the water surface.

http://en.wikipedia.org/wiki/Eleocharis

what other similar aquatic or semi-aquatic Genus of tiny uniform blade width grass plants can I check through?
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post #6 of 9 (permalink) Old 07-22-2007, 01:46 AM
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it must be in the same Eleocharis group, there are hundreds kind of them and it's really hard to tell the different. i made a mistake in choosing acicularis in the emersed form and end up with parvula.
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post #7 of 9 (permalink) Old 07-22-2007, 02:14 AM Thread Starter
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Try to consider a different Genus.
Eleocharis vivipara is the longest
and thinnest I could find, and even
that one is too thick and rigid when
compared to what's growing in my tank.



Eleocharis montevidensis


Last edited by spypet; 07-27-2007 at 02:03 PM.
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post #8 of 9 (permalink) Old 07-22-2007, 06:02 AM
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it's probably in the spikerush family.
these sites may help.
http://plants.ifas.ufl.edu/photos.html

http://plants.usda.gov/dl_state.html
http://plants.usda.gov/characteristics.html
(their site is down for the moment but check back later)

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post #9 of 9 (permalink) Old 07-22-2007, 11:30 AM
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I think that it could be in the Eleocharis family. You have a lot of species growing N.J. (67 in the Flora of North America). This is hard read, but the answer could be in here:
Eleocharis species in N.A.

I tried yesterday to go through some of that but gave up..
Today I found this E. robbinsii but it seems too big. But they write of it:
Quote:
when submersed plants often forming numerous, filiform, flaccid culms without spikelets, sometimes with whorls of slender branches, 0.10.3 mm wide; soft,
A drawing of E. robbinsii (last on on the right).

Another genus that reminds me of is Pilularia (cf. Pilularia americana) - but it doesn't have many-leaved tufts & seems not to be present in N.J.
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