أرسل هذا في رسالة قصيرة: Pollination of wild lady slipper orchids Cypripedium yunnanense and C. flavum (Orchidaceae) in south-west China: Why are there no hybrids?

 _____     _    _     _____     ______   __   _   
|  __ \\  | || | ||  /  ___||  /_   _// | || | || 
| |  \ || | || | || | // __     -| ||-  | '--' || 
| |__/ || | \\_/ || | \\_\ ||   _| ||_  | .--. || 
|_____//   \____//   \____//   /_____// |_|| |_|| 
 -----`     `---`     `---`    `-----`  `-`  `-`