I often met this quite tall plant in the Atlantic rainforest.
I'm not sure in what family to search..



Not sure if this is the same plant with the flowers standing up, but at least it looks related.

I noticed now that the 4th and 5th picture must be another species in the family as the leaves look more smooth!

It seems to be Heliotropium or something in the same family Myriam, the first plant that is..

http://fm2.fieldmuseum.org/pla...

https://www.google.co.uk/searc...

http://www.ufrgs.br/fitoecolog...

Varronia?

https://www.fmcagricola.com.br...

http://plantgenera.org/illustr...

Possibly Piper aduncum?
http://www.natureloveyou.sg/Pi...
Or something else from the Piperaceae family...

Thanks Janet! But I don't think it is in the family (Boraginaceae) of a Heliotropium, it doesn't feel right, the flowers on the plants I met never seem to open like in on those links, they actually look and behave like from an Anthurium, though of course that cannot be!

I'm sure it looks like a Piper species, Stone, thank you!!
I'll have to check the 'Flora do Brasil' which species grow there!

Ughhhh, 91 species Piper!!!!

Piper aduncum does look correct! There's a list of Piper to go through ..

http://reflora.jbrj.gov.br/jab...

The last photo looks like Piper amplum .. (no, the leaf venation doesn't match!)

https://sites.google.com/site/...

Piper aduncum does look correct, Janet for the first plant!
I'll keep the others as Piper species..