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-   -   Ludwigia glandulosa x palustris (https://www.aquaticplantcentral.com/forumapc/new-plants-planted-aquariums/85981-ludwigia-glandulosa-x-palustris.html)

davemonkey 11-02-2012 06:43 AM

Ludwigia glandulosa x palustris
 
Houston Area Aquatic Plant Society is proud to introduce Ludwigia glandulosa x palustris ! :D It is a natural hybrid that is not altogether uncommon, and the specimen that was collected (which yielded ALL the submersed samples we now have) was found in Chambers County, TX where one would expect to find this hybrid. We are 99.8% sure on the ID and have sent off a specimen for confirmation, and the ID has been pre-confirmed.

This plant is quite large by any standard for a stem plant. From tip to tip of leaves it will get 2-3" inches across. It has a curious growth habit, which could be good or bad depending on how people want to scape and how large their tank is. It grows horizontal/diagonal, depending on intensity. In my tank, it grew to about 6” high (crowded by other plants) and then took off horizontally. In Kevin’s it grew horizontal. At the nodes it shoots out groups of new shoots.

The leaves are long and lanceolate and bright lime-green with pink/bronze highlights at the tops and can get a bit darker depending on lighting and fertility...but still a general bright green overall. It’s still too soon to know what it will do in a scape since we have just been trying to propagate it, but I have just now re-scaped my office tank with it and will know soon what exactly it will really do, how it will look with other plants to compliment it, etc… Probably in a couple weeks or a month we’ll have some really good information and photos on this species.

davemonkey 11-02-2012 07:00 AM

Re: Ludwigia glandulosa x palustris
 
The first of the stems popping up behind dense vegetation. This one later turned drastically horizontal in moderate-high light:http://i287.photobucket.com/albums/l...s/P8280009.jpg

The same stem is the right-most one shooting off to the side...and you see more stems coming up:http://i287.photobucket.com/albums/l...ustrisSub1.jpg

http://i287.photobucket.com/albums/l...s/PA010008.jpg

http://i287.photobucket.com/albums/l...ustrisSub4.jpg

Bushing out at the nodes:http://i287.photobucket.com/albums/l...ustrisSub2.jpg

davemonkey 11-02-2012 07:03 AM

Re: Ludwigia glandulosa x palustris
 
Here are pics of what it looks like in nature...notice it is not erect as L. glandulosa should be...the stems drag along the ground, nearly decumbent, but not rooting at the nodes as L. palustris would. Other than that, the structure and identifying characteristics key out to L. glandulosa for the most part.:

http://i287.photobucket.com/albums/l...P8130010-1.jpg

http://i287.photobucket.com/albums/l...s/P8130007.jpg

http://i287.photobucket.com/albums/l...s/P8130009.jpg

http://i287.photobucket.com/albums/l...P8130012-1.jpg

http://i287.photobucket.com/albums/l...s/P8130024.jpg

davemonkey 11-02-2012 07:06 AM

Re: Ludwigia glandulosa x palustris
 
At any rate, in a few weeks I should have some good photos of how it actually looks in a scape as a specific planting with other plants, etc...

pweifan 11-02-2012 01:21 PM

Re: Ludwigia glandulosa x palustris
 
This is a very interesting find! Is it as aggressive a grower as Ludwigia repens x arcuata? It's too bad it doesn't seem to get as red as other Ludwigias.

davemonkey 11-02-2012 01:58 PM

Re: Ludwigia glandulosa x palustris
 
Quote:

Originally Posted by pweifan (Post 642917)
This is a very interesting find! Is it as aggressive a grower as Ludwigia repens x arcuata? It's too bad it doesn't seem to get as red as other Ludwigias.

I think it is just about like L. brevipes as far as pace of growth...but it's been awhile since I've kept that species. Really, I've always thought all the Ludwigias grew about the same...this one fits right in there. As far as color...it's a perfect contrast against anther red plant. The tank I'm trying it out in now has a very large and VERY red crypt as the focal point, and orange-red rocks...I'm hoping the way this one grows it will contrast that redness.

pweifan 11-02-2012 02:13 PM

Re: Ludwigia glandulosa x palustris
 
Thanks, Dave. In my limited experience, I've found that Ludwigia repens x arcuata grows faster than L. repens which grows faster than L. palustris. I've never grown L. brevipes before.

I'm guessing this plant would be too big for my 15 gallon by the sound of it.

davemonkey 11-02-2012 02:19 PM

Re: Ludwigia glandulosa x palustris
 
Ah...okay. Well, I guess for now I'll just say it grows about like repens. Kwc1974 has grown more species than I have and he is the only other person with this plant right now. I'll ask him to chime in with his thoughts about rate of growth. We probably need to get this into some more hands soon...I just wanted to see what it would look like in a scape first, but maybe I am too cautious.

Michael 11-02-2012 02:42 PM

Re: Ludwigia glandulosa x palustris
 
". . .the greatest service which can be rendered any country is to add an useful plant to it's culture. . ."

--Thomas Jefferson

DonaldmBoyer 11-02-2012 03:54 PM

Re: Ludwigia glandulosa x palustris
 
Pretty interesting find, Dave! I'm quite surprised about the color...you would think that this would be naturally bright red underwater. Let me know if you want me to try to grow a stem or two in my high light set up to see if different lighting or conditions will alter it. It would be very cool to try!


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