[Before October 1864]2
Professor Lehmann gives in his monography Potentilla Norvegica as an Australian species.3 Though this is probably an error, some allusion to it would be not misplaced.
In reviewing once more the Hydrocotyles, I find Richard's monography4 a very imperfect treatise, as regards not only the text but still more the plates. In RBr. conception of the species, is in this instance, like many others (I cannot refrain from the remark) no soundness, which causes an immense deal of trouble and useless waste of time to subsequent observers. Of Dr Hookers circumscription of the Tasmanian Hydrocotyle I can also but very partially approve.
I enclose a specimen of the true Callitriche autumnalis, which though perhaps not specifically different from C. verna, represents a form not yet found in Australia[.] Koch's synopsis deals fairly with this plant5
Callitriche autumnalis
Callitriche
Hydrocotyle
Potentilla Norvegica
Please cite as “FVM-64-00-00c,” in Correspondence of Ferdinand von Mueller, edited by R.W. Home, Thomas A. Darragh, A.M. Lucas, Sara Maroske, D.M. Sinkora†, J.H. Voigt† and Monika Wells accessed on 29 March 2024, https://epsilon.ac.uk/view/vonmueller/letters/64-00-00c