Reused with different colors from supertuxkart/data/textures:

-water_light2    (water_light is the original)
-water_light3    
-bow             (from stk0.5)
-rock_grey       (rock is the original)
-rock_lightgrey
-rock_white


Selfmade parts and under GPL and CC-BY-SA, by Canis Lupus :

- flower4
- invisible
- Cactus1
- leave1
- leave4
- pot
- pumkin

Based on pictures from from burningwell (released under public domain) :
- flower1
- Bleech
- leave2
- Mossy_wall

from wikimedia :

-flower2    (http://commons.wikimedia.org/wiki/File:Cosmos_bipinnatus_06_ies.jpg,
             CC-BY-SA 3.0, by Frank Vincentz)
-flower3    (http://commons.wikimedia.org/wiki/File:Aster_Tataricus.JPG,
             CC-BY-SA 3.0 unported, by Pascalou Petit)
-flower5    (http://commons.wikimedia.org/wiki/File:Avutil%C3%B3n_GDFL16.JPG,
             CC-BY-SA 3.0, by Luis Miguel Bugallo Sánchez)
-flower6    (http://commons.wikimedia.org/wiki/File:Zephyranthes_candida2.jpg,
             CC-BY-SA 3.0, by KENPEI's photo)
-flower7    (http://commons.wikimedia.org/wiki/File:Flor_GDFL_03.JPG,
             CC-BY-SA 3.0, by Luis Miguel Bugallo Sánchez)
-Cucurbita_pepo_04 (http://commons.wikimedia.org/wiki/File:Montes.JPG,
             CC-BY-SA 3.0, by Wilfredo R Rodriguez H)

- Trifolium_repens_07_ies (http://commons.wikimedia.org/wiki/File:Trifolium_repens_07_ies.jpg
            CC-BY-SA 3.0, by Frank Vincentz)

- leave3 (http://commons.wikimedia.org/wiki/File:Lisc_lipy.jpg,
          CC-BY-SA 3.0, by Krzysztof P. Jasiutowicz)

- TiZeta_stalkM (http://commons.wikimedia.org/wiki/File:Dwarf_cavendish_leaf.JPG,
                CC-BY-SA 3.0, by Ben Clough)
                
- Greenhouse-Palm-jubaea01
    based on image by Forest & Kim Starr, with modifications by Marianne Gagnon
    Released under CC-BY 3.0

- Palm-arecaceae 
    based on image by José Reynaldo da Fonseca, with modifications by Marianne Gagnon
    Released under CC-BY-SA 3
    
    
from http://yorik.uncreated.net/greenhouse.html
-Rose                      CC-BY 3.0


from http://blender-archi.tuxfamily.org/Textures 
-Sophora                   GPL


from DJHelium:

-secretgarden.ogg
