The hairs on Calystegia pubescens are generally very fine and easy to miss visually unless the examiner is specifically looking for them....Read More..
additionally the hairs are not easy to photograph and unless the photo is categorically designed to show the fine hairs , this feature will more than likely not be visible in an ordinary or the otherwise 'casual' photograph.
Calystegia hederacea never shows the type of downy covering that is a feature of Calystegia pubescens.
The hairs on Calystegia pubescens are generally very fine and easy to miss visually unless the examiner is specifically looking for them....Read More