Sure!
The main thing to always remember is the reverse of an old adage, "Can't see the trees because of the forest". Translated: Pictures of huge wads of plants make it almost impossible to discern the necessary detail for identificiation purposes. The details exhibited by a single plant are far more useful than a tangled mass of multiple plants.
Also, plant-features should preferable fill as much of the image as possible; not 50% plant and 50% useless background clutter. This isn't always possible with point-n-shoot cameras due to their fixed or limited focus-range (sometimes no less than 24"). Simply image the plant as close to the lens as the len's focus-limits will allow.
I like to hold the plant in one hand and snap the photo with the other hand. By doing so, I'm easily able to adjust for optimal distance between plant and lens - and the hand that appears in the image provides an excellent dimensional-reference.
