Here is a low-poly indoor plant in made some time ago.
<img src="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-11.jpg?w=917" alt="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-11.jpg?w=917" width="512" height="512" />
The Zip-File contains one version for Cycles and one version
for BI render, also this plant work well in BGE.
<img src="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-3.jpg?w=1376" alt="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-3.jpg?w=1376" width="512" height="512" />
<img src="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-4.jpg?w=917" alt="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant-4.jpg?w=917" width="512" height="512" />
<img src="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant.gif?w=158" alt="http://3dartdh.files.wordpress.com/2013/09/low-poly-indoor-plant.gif?w=158" width="512" height="972" />
With this material-setup for the leaves you don't get
a alpha problem in Blender's game engine.
<img src="http://3dartdh.files.wordpress.com/2013/09/setting-53.jpg?w=530" alt="http://3dartdh.files.wordpress.com/2013/09/setting-53.jpg?w=530" width="235" height="71" />
1-Alpha-mask
<img class="attachment-917x917" src="http://3dartdh.files.wordpress.com/2013/09/bpng_schwaz_weistensel.jpg?w=256" alt="Low-poly indoor plant by DennisH2010" width="250" height="250" /> <img src="http://3dartdh.files.wordpress.com/2013/09/setting.jpg?w=551" alt="http://3dartdh.files.wordpress.com/2013/09/setting.jpg?w=551" width="248" height="248" />
2-Color-map
<img class="attachment-917x917" src="http://3dartdh.files.wordpress.com/2013/09/bpng.jpg?w=526" alt="Low-poly indoor plant by DennisH2010" width="250" height="250" /> <img src="http://3dartdh.files.wordpress.com/2013/09/setting-2.jpg?w=551" alt="http://3dartdh.files.wordpress.com/2013/09/setting-2.jpg?w=551" width="247" height="247" />
3-Normal-Map
<img class="attachment-917x917" src="http://3dartdh.files.wordpress.com/2013/09/bpng_nrm-kopie.jpg?w=256" alt="Low-poly indoor plant by DennisH2010" width="250" height="250" /> <img src="http://3dartdh.files.wordpress.com/2013/09/setting-3.jpg?w=551" alt="http://3dartdh.files.wordpress.com/2013/09/setting-3.jpg?w=551" width="249" height="249" />
<img src="http://3dartdh.files.wordpress.com/2013/09/setting-42.jpg?w=548" alt="http://3dartdh.files.wordpress.com/2013/09/setting-42.jpg?w=548" width="504" height="186" />
I photograph a leaf and edited the image with photoshop. For the texture i only used on half of this leaf to get a better texture quality on a smaller image, in Blender i mirrored the texture with polygons via the UV/Image-Editor.
Where did you get that texture?