You don't in fact need several light sources, a white reflector on the dark side of the plant will fill in the shadows, even a white sheet of paper can be used. Those 5 in 1 diffuser/reflectors in my original video are very handy for this since I am not a real fan of using artificial light in flower photography, preferring to use natural light. You can even make a diffuser from a white sheet of tissue paper stuck to a wooden frame, some use an old picture frame or similar for this.
https://www.youtube.com/watch?v=F8_btceWWlA
Whilst it is theoretically possible to get it right in camera it is very difficult since cameras do not have as wide a dynamic range as the human eye. That is the reason I shoot RAW since it allows more tweaking of the image in post processing than do in camera JPEG's, as this video shows:-
https://www.youtube.com/watch?v=qBF1i8t8Skw
However, obviously what constitutes correct flesh tones is a matter of personal opinion, since I thought they were better straight out of camera than after his adjustments above.
Most of the higher end cameras can shoot RAW. You obviously need post processing software that can open the RAW files from your camera, since unlike the universal JPEG's each camera manufacturer has their own type of RAW files and often alters it with their latest camera. I use Photoshop Elements with the free Adobe Camera Raw editor. As to space on memory cards that is not really a problem these days, since I shot 1400 RAW images on a single card in Chile last year with my Nikon D200.
http://photographyconcentrate.com/10-re ... oting-raw/
Evidently you can even shoot RAW on an I-Phone now.
http://www.imore.com/how-shoot-raw-phot ... ne-or-ipad
On course before you start any photo manipulation the first thing is to calibrate your monitor for photography, or others may not see your photo's as you see them. Computer monitors straight out of the box are notorious for not being calibrated right for photography. The makers usually adjust them to enhance the reading of text. There are plenty of free calibrators on the web to use though.
http://www.makeuseof.com/tag/5-online-t ... e-monitor/