British algologist from Pitton, Devon who was a highly regarded correspondent of W.H. Harvey and R.K. Greville. Harvey referred to her as 'the facile regina of British algologists'. The genus of marine red algae Griffithsia Agardh was named in her honour. Her private herbarium was deposited at Torquay Museum. Important material at BM includes 780 British seaweeds purchased in 1852, 880 specimens presented by the North Devon Athenaeum (BPL) in 1917, and material from the herbaria of several other algologists to whom she sent specimens. It is probable that material deposited at K was, at least in part, transferred to BM after 1961 under the terms of the Morton Agreement. Collections of her daughter A.E. Griffiths are sometimes mistaken for those of A.W. Griffiths.