Look for Water avens in damp habitats, such as riversides, wet woodlands and wet meadows. It has nodding, purple-and-orange flowers that hang on delicate, purple stems.

Look for wood avens along hedgerows and in woodlands. Its yellow flowers appear in spring and provide nectar for insects; later, they turn to red, hooked seedheads that can easily stick to a…

Fel mae ei enw yn Saesneg, ‘Himalayan balsam’, yn awgrymu, mae ffromlys chwarennog yn dod o'r Himalayas ac fe'i cyflwynwyd yma yn 1839. Mae bellach yn chwyn ymledol ar lannau afonydd a…