I have pictures of several plants from Kauai I don't know. Here's the first, it was a small landscaping shrub, the flowers were large, about two inches across.

Allamanda schottii?

http://www.plantbook.org/plant...

http://biogeodb.stri.si.edu/bi...

That looks right, or at least closely related. Thanks!

The next one was a large banana-looking plant.

I didn't get a very good picture of number 3, but it was common along the roadsides so I hope someone will recognize it.

Number 4 was some kind of orchid I think, no leaves, only the flower stalk was left.

Number 5 was another one where the picture isn't very good.

Number 6 is a palm , but which one?

I thought the last one was maybe Pinus patula, but I'm not even sure it's a true pine?

#1 Allamanda
#2 Heliconia
#3 Reminds me of Yellow Oleander (Cascabela thevetia)
#4 Reminds me of Grass Pink Orchid (Calopogon tuberosus) another image: http://www.wildflower.org/plan...
#5 ?? Looks familiar, bloom reminds me of Amsonia but it's not that ... leaves don't match.
#6 Possibly a variety of Pritchardia Palm
#7 ??

#7 is Casuarina sp., she-oak.

Australian Pine (Casuarina equisetifolia)

https://www.google.com/search?...