THE DISTRIBUTION OF POTAMOGETON IN BRITAIN. 189 
bl unaware that the name heterophyllum had heen preoccupied by 
aworth, and employed it in the belief that his plant was the type 
vs nage Species. A certain animus is also visible in Haworth’s 
re nce to the figure of Agrostis littoralis (Polypogon littorali, 
eauv.) in ‘English Botany.’ He says it was re as a 
triaristata Haworth. Specimen by Mr. Hancock about 3 years ago not 
Jit to dra es ee ee co 
ee w, who said it can scarce be the Ag. littoralis Withg. Mr. 
Wo 285 gathered it near the powder magazine about 4 miles from 
Si wich, August 4, 1803.” The italicised portion is crossed 
3 : aie In Smith’s hand is added: « Withs* plant is Phleum 
pat quoting ‘“Jacksonia Rafin. in Desy. Journ. Bot. il. 
4 re adds in a footnote, ‘‘ dicat. G. Jackson, botanico anglico.”’ 
4 oubt the subject of this sketch is intended, but I do not know 
ow Pfeiffer ascertained the fact, as Rafinesque in the paper cited 
—a characteristic ‘prospectus’ of a never-to-be-issued work— 
merely says, ‘ Jacksonia trifoliata, Cleome dodecandra L.” 
THE DISTRIBUTION OF PUTAMOGETON IN BRITAIN. 
’ By Arraur Beyyert, F.L.S. 
* Revis. Plant. Succul. 223 (1812). __¢ ‘ Nomenclator.’ 
