Subject: Why don't African Violets' pigments seperate in a Chromatography lab?

Our biology class did a chromatography experiment with different types of 
plants.  We extracted the pigments from the leaves by rolling the edge of a 
quarter over the leaf while it was on the chromatography paper.  This made the 
pigments go onto the paper.One of my plants was an African Violet.  Other 
students used grass but i cant remember the other plant i used. I am sorry.  
There was no obvious difference between the African Violet extract compared to 
other plants.  During the experiment the pigments of the African Violet leaf 
did not seperate at all while other plants seperated into 3 or 4 bands of 
color, ranging from green to yello to light orange.  My teacher was not sure 
why this was but he said that this had happened before when students had tried 
to use African Violets.  I was just wondering if the pigment makeup of this 
specific plant was the cause of the lack of seperation. Thank you for your time 
and any information you can give me.

Re: Why don't African Violets' pigments seperate in a Chromatography lab?