Help for photographing very dark flowers

[Hedge]

Hi
I have a Colmanara Masai Red in flower at the moment which has extremely dark red flowers with arich rich maroon lip. I am not very experienced at taking pictures of such flowers at this time of year when natural light is poor. Flash just makes the flowers look blacker. In actual fact , with light behind them they are not a solid colour at all.

I have a Fuji Pics S5700 which has macro facility and various flash options. Also I have reflected light from snow at the moment to cope with when the plant is in the window. Taking it outside to photgraph is NOT currently an option!!!!

All tips and hints would be welcomed. I do have a flash gun somewhere that I could manually fire if you think extra light from an angle eg bounce off a white ceiling would help, although coordinating it might be fun!

this is a link to a retailer's image of what I'm trying to achieve:
Colmanara 'Masai Red' - FS