NOTES ON THE FLORA OF LINCOLNSHIRE. 55 



serrate leaves Ccinnot possibly represent those of the so-called 

 odorata. A single detached leaf, however, is referred by Burman 

 in his accompanying text (Z. c. p. 85) to a variety of the plant 

 figured, and this probably belongs to the species known as odorata. 



Those who insist on the retention of the oldest trivial name" 

 will thus be compelled to apply odorata to the plant hitherto known 

 as purparascens, and to find a new title for that which up to now 

 has been known by the latter name. Fortunately, however, 

 Cassiui's description of the species when establishing the genus 

 Pluchea makes it clear that under odorata he had in view the plant 

 which all writers since Linnaeus have intended under that name. 

 Plis action removes the necessity for so inconvenient a change, 

 unless the priority of the trivial part of the name be insisted on. 

 The plants will stand thus : — 



Pluchea odorata Cass, in Diet. Sci. Nat. xlii. 3 (1826), excl. syn. 

 Conyza odorata Mill. Diet. ed. 8 (1768) et ahorum, non L. 



Pluchea purpurascens DC. Prodr. v. 452 (1836). 



Conyza odorata L. Syst. x. 1013 (1759) and Herb. ! [ph 



Hiern), non aliorum. 

 Conyza purpurascens Sw. Prodr. 112 (1788). 



The following note on an obscure plant may be printed here. 



Baccharis arborea Linn. Mant. 284. ''Habitat . . . insulfe 

 Johann^e sylvis. Koenig." DeCandolle (Prodr. v. 427j places 

 this among his "non satis not«." Specimens in Herb. Banks 

 from Johanna Island, Robertson, 1772, written up by Solander as 

 B. arborea = Vernonia senegalensis Less. There is nothing in the 

 original description to contradict this identification. 



NOTES ON THE FLORA OF LINCOLNSHIRE. 



By the Rev. E. Adrian Woodruffe-Peacock, F.L.S. 



As there is no finality in botanical matters, the species ebbing 

 and flowing from natural and artificial causes, my friendly readers 

 must look on these notes with the kindly eyes of those who forgive 

 mistakes where earnest work has been attempted. My efforts 

 during many years have been devoted not merely to compiling a 

 bare list of species found in Lincolnshire (N. 54 and S. 53), 

 but rather to collecting 100,000 notes on geological and drift dis- 

 tribution, with the avowed object of learning why the flora of the 

 two contiguous vice-counties differs as much as it does — practically 

 why we have this flora at all. The relation of species to their 

 geological environment in one part of the county is no sure guide 

 as to what is certainly to be found on the same soil in another spot 



* J. A. Murray's warning on this head should not be overlooked : — " Cave, 

 ne prae observantia nimia in antecessores ex eorum differentia specifica nomen 

 triviale minus commodum emergat." Phil. Bot. Suppl. no. 16 (1792). 



