Hi,

I found these growing in dark places in the rainforest, Paraty, they were quite tall 50-70cm, the blooms large .4-5cm diameter..

Thank you!

I thought the leaves resemble some of the large-leaved Fuchias, so could be in family Onagraceae.

http://www.missouriplants.com/...

Other than that they also resemble large-leaved Imaptiens.

There's a lot of Ludwigia sp. listed..

http://www.panoramio.com/photo...


Onagraceae Ludwigia affinis (DC.) H.Hara
Onagraceae Ludwigia albiflora Ramamoorthy
Onagraceae Ludwigia anastomosans (DC.) H.Hara
Onagraceae Ludwigia bonariensis (Micheli) H.Hara
Onagraceae Ludwigia brachyphylla (Micheli) H.Hara
Onagraceae Ludwigia bullata (Hassl.) H.Hara
Onagraceae Ludwigia burchellii (Micheli) H.Hara
Onagraceae Ludwigia caparosa (Cambess.) H.Hara
Onagraceae Ludwigia decurrens Walter
Onagraceae Ludwigia densiflora (Micheli) H.Hara
Onagraceae Ludwigia elegans (Cambess.) H.Hara
Onagraceae Ludwigia erecta (L.) H.Hara
Onagraceae Ludwigia filiformis (Micheli) Ramamoorthy
Onagraceae Ludwigia foliobracteolata (Munz) H.Hara
Onagraceae Ludwigia grandiflora (Michx.) Greuter & Burdet
Onagraceae Ludwigia hassleriana (Chodat) Ramamoorthy
Onagraceae Ludwigia helminthorrhiza (Mart.) H.Hara
Onagraceae Ludwigia helminthorriza (Mart.) H.Hara
Onagraceae Ludwigia hexapetala (Hook. & Arn.) Zardini et al.
Onagraceae Ludwigia hookeri (Micheli) H.Hara
Onagraceae Ludwigia hyssopifolia (G.Don) Exell
Onagraceae Ludwigia inclinata (L.f.) M.Gómez
Onagraceae Ludwigia irwinii Ramamoorthy
Onagraceae Ludwigia lagunae (Morong) H.Hara
Onagraceae Ludwigia laruotteana (Cambess.) H.Hara
Onagraceae Ludwigia latifolia (Benth.) H.Hara
Onagraceae Ludwigia leptocarpa (Nutt.) H.Hara
Onagraceae Ludwigia longifolia (DC.) H.Hara
Onagraceae Ludwigia major (Micheli) Ramamoorthy
Onagraceae Ludwigia martii (Micheli) Ramamoorthy
Onagraceae Ludwigia mexiae (Munz) H.Hara
Onagraceae Ludwigia multinervia (Hook. & Arn.) Ramamoorthy
Onagraceae Ludwigia myrtifolia (Cambess.) H.Hara
Onagraceae Ludwigia natans Elliott
Onagraceae Ludwigia neograndiflora (Munz) H.Hara
Onagraceae Ludwigia nervosa (Poir.) H.Hara
Onagraceae Ludwigia octovalvis (Jacq.) P.H.Raven
Onagraceae Ludwigia peploides (Kunth) P.H.Raven
Onagraceae Ludwigia peruviana (L.) H.Hara
Onagraceae Ludwigia potamogeton (Burch.) Hara
Onagraceae Ludwigia pseudonarcissus (Chodat & Hassl.) Ramamoorthy
Onagraceae Ludwigia quadrangularis (Micheli) H.Hara
Onagraceae Ludwigia repens J.R.Forst.
Onagraceae Ludwigia rigida (Miq.) Sandwith
Onagraceae Ludwigia sedoides (Humb. & Bonpl.) H.Hara
Onagraceae Ludwigia sericea (Cambess.) H.Hara
Onagraceae Ludwigia tomentosa (Cambess.) H.Hara
Onagraceae Ludwigia torulosa (Arn.) H.Hara


Ludwigia peruviana looks close if not the one!

http://www.pittwater.nsw.gov.a...

You can view drawings of others in genus Ludwigia .. Ludwigia octovalvis looks similar.

http://plantgenera.org/taxa.ph...

If the photos on the Texas site are correct, the leaves are narrower on Ludwigia octovalvis .

http://www.wildflower.org/plan...

Look at Ludwigia tomentosa, some of the photos look just like yours, and the flower petals are wider spread too..

http://sites.google.com/site/f...

Ludwigia tomentosa really looks like it, Janet! The leaves were really broader than with Ludwigia octovalvis shown on the Texas site..
Thanks!