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Project Noah Nature School
looks like Pyrostegia venusta
http://en.wikipedia.org/wiki/Pyrostegia_...
Yes, "mimosa" is a common name for several plants, including Albizia julibrissin (mimosa tree)
http://plants.ifas.ufl.edu/node/29
I think "Mimosa" is sometimes a confusing name because it is also a plant genus with 400 species
http://en.wikipedia.org/wiki/Mimosa
and it is sometimes used for Acacia species with yellow flowers e.g.
http://commons.wikimedia.org/wiki/File:M...
Anyway, it's easy to add multiple common names to a spotting (spotter's option).
It's a Catalpa species. I'm guessing it is cultivated (not wild) and then it is likely to be Catalpa speciosa or Catalpa bignonioides (hard to tell which from the photos).
The pink flowered plant (first photo and some others) is Celosia spicata
http://en.wikipedia.org/wiki/Celosia
Since the photo is from Madrid, it seems appropriate to guess that is could be
Bromus madritensis (subspecies rubens), but it's difficult to ID grasses from photos.
http://calphotos.berkeley.edu/cgi/img_qu...
http://calphotos.berkeley.edu/cgi/img_qu...
It's a Caryota species. Caryota urens and Caryota mitis are especially popular in landscaping.
http://www.palmpedia.net/wiki/Category:C...
It's a Dombeya species. Dombeya wallichii is one of the most commonly grown species:
http://toptropicals.com/cgi-bin/garden_c...
The first picture is Stachytarpheta cayennensis. The flowers in the second picture are Erigeron karvinskianus. You'll need to make a separate posting for each species and their corresponding photo so that you can fill in the IDs.
Based on the leaflets and clustering of flowers, this is an Albizia (Albizia julibrissin)
http://plants.usda.gov/java/profile?symb...
A walnut tree (Juglans species).
