#33 the colors are off, just doesn't seem to jell. Another company has a name of bluebonnet, so I would steer clear of it. good take on the icon idea though
#11 is more for interior decorators, the colors are too pale and the script too fancy. I like the pineapple, the palm in the back need to be bigger and it can loose the secondary back ground.
#14 just doesn't catch the eye, if doing something stand alone, go for a plant like the yucca you did in 34.
#13 proportionately off and the color clash. when defining a border, maybe you absence of color or a black line?