BobinCA1946

Does H.M. grow upwards and form thick bushy growth?
Or....does it uproot and float?

And...just to double-check, so orientalis only has "two" leaves per node????
From this thread I have a plant that was described as orientalis, but it has 3 leaves per node and it is growing quite healthy, very bushy and the bush is growing upwards. It is rooted at the base of the bush and not spreading horizontally as much as it is vertically.

Bob

Cavan Allen

Drat, I meant to get back to you sooner than this. Sorry about that Bob!

Yes, it does tend to grow taller and sometimes turns a darker green, though I don't know why that happens. E. triandra has much larger leaves and grows prostrate more easily. E. orientalis should have two leaves per node.

Got any photos?

Vadim S

Martin

hm.. these pics don't look very much like the E. orientalis I got.

Mine is dark green, and .. still... lowgrowing..

And no.. I haven't got a picture.. yet.. . will take a shot after the weekend.

miremonster

Hello Vadim & Martin,
on both websites I can't find any pics of an E. orientalis. Do You have direct links to the pics?

It seems that different plants are sold as "Elatine orientalis". What ever You all have got under this name, I'd recommend to cultivate it emersed and try to flower it.

Zezmo

Two leaves per node is the best way to tell it from HM, as others have indicated.

The other stuff, like color and water roots are just too dependant on growing conditions to be reliable.

If you are also growing E triandra, the leaves have a similar (but not identical) veination pattern. I would describe this as similar to how most (if not all) hygro's have very similar veination to the leaves.

Vadim S

Sorry, the photo on the link removed, this picture I kept:

photo source
http://store.shopping.yahoo.co.jp/chanet/23820.html

marrow

That is interesting Vadim, the plant i have and bought here on this site, looks nothing like that. Mine looks pretty much like HM but with the leaf number difference. I will try to get apic out in the next day or so.

miremonster

Thanks, Vadim! Your plant is similar to the (or possibly more than one) 2-leaved mystery Hemianthus, called "Amano's pearl grass" by Neil Frank: http://www.aquaticplantcentral.com/f...-plant-id.html
but the appearance is somewhat different.
From where did You get Your plant? It may depend on the company / trader what kind of plant is sold as "Elatine orientalis".
Perhaps only flowers or fruits could evidence which species are actually sold under this name.

EDIT: Now I see, the source of the photo is the Japanese site. Did You obtain E. orientalis from this trader?

@Zezmo:
The venation of E. triandra and Hygrophilas is pinnate (a number of veins arising along the midrib) while the leaves of Hemianthus have mostly 1 pair of veins parallel to the midrib, arising from the midrib near the leaf base.
Just to make sure: also Your E. orientalis does show this difference to Hemianthus?