SUPPLEMENT TO INDEX. 101 



(Enanthe Lachenalii; named (E. pimpinelloides in old books. 



(Enanthe silaifolia ; many false localities. 



(Enanthe fluviatilis ; not distinguished from 0. Phellandrium by the foreign 



botanists. 



Onobrychis sativa ; native on the chalk. 

 Onopordum Acanthium ; often a casual or alien. 

 Ophrys aranifera ; apparently decreasing (not seen near London). 

 Orchis militaris^ Simia, and purpurea ; localities of these much confused. 

 Orchis hircina ; very rare. 

 Orobanche elatior ; several localities erroneous. 



PEUCEDANUM OFFICJNALE ; (Enanthe Lachenalii mistaken for it occasion- 

 ally. 



Pinus sylvestris ; nowhere truly wild but in the Highlands. 



Polygonatum multiflorum ; difficult to decide where truly native. 



Potamogeton heterophyllus ; confused with P. obiusifolius, natans, and 

 polt/gonifolius. 



Potamogeton natans ; often confused with the preceding. 



Potamogeton polygonifolius ; often mislabelled P. natans. 



Polygonum mite ; allied' to P. Persicaria, but has been confused with P. 

 minus. 



Polystichum aculeatum and var. lobatum ; confused with P. angulare. 



Populus alba ; impossible to fix its native area. 



ROSA RUBIGINOSA ; true and false localities inextricably confused. 

 Rubus (fruticosus) ; distribution that of a name only, as regards its 

 segregate forms. 



SALVIA PRATENSIS ; many erroneous localities (extinct at Cobham ?). 



Scirpus sylvaticus ; occasionally mistaken for S. carinatus. 



Scirpus multicaulis ; partly confused with S. uniglumis. 



Scirpus ccBSpitosus ; occasionally mislabelled S. pauciflorus. 



Scirpus carinatus ; an unsatisfactory species ; localities confused with those 



of S. triqueter and S. glaucus. 

 Sclerochloa Borreri ; an unsatisfactory species. 

 Scrophularia Ehrhardti, and Balbisii ; confused under the common name of 



S. aquatica. 



Senecio viscosus ; localities decreasing. 

 Silene quinquevulnera ; a casual. 

 Sisymbrium Trio ; localities uncertain. 

 Sonchus palustris ; erroneously reported through misnamers for /S'. 



arvensis. 



Sonchus oleraceus ; S. asper often confused with this. 

 Stachys ambigua ; name often misapplied to S. palustris. 

 Statice bahusiensis ; doubtfully, sufficiently, or permanently distinct from 



S. Limonium. 



TARAXACUM PALUSTRE ; not always distinguished from T. officinale. 

 Trifolium ochroleucum ; many localities need verification. 



