VI. INTRODUCTION. 



Host; Euphrasia con/usa, Pugsley; Ajuga pyramidalis, Linn; 

 Salicornia appressa, Dum; Sagittaria sagittifolia, Linn; Agrostis 

 verticillata, Vill; Mibora minima, Desv; Poa palustris, Linn; 

 Atropis festuciformis, Richt; Isoetes hystrix., Durieu; and Chara 

 delicatula, Groves and Bullock- Webster. 



The publication of Mrs. Gregory's British Violets in 1912 

 stimulated the collection thereof, with the result that one species, 

 two hybrids, and fifteen varieties or forms, have been added to 

 the County Flora. 



The Davey Herbarium of Cornish and other British plants 

 was acquired, after his death, by the Royal Institution of Corn- 

 wall. It is available for examination at the Truro Museum, 

 where also the Tellam Herbarium is preserved. The Herbarium 

 of Dr. Ralfs came a few years ago into the possession of Mr. 

 H. H. Goddard, who found the papers being used for wrapping 

 up groceries. The Thurston Herbarium of Cornish plants, still 

 in the making, has been presented to Kew. Private Cornish 

 Herbaria are maintained by Mr. and Mrs. Perrycoste, Polperro; 

 Mr. F. Rilstone, Polperro; Dr. C. C. Vigurs, Newquay; and Mr. 

 W. Wise, Launceston. Mr. Wise has also presented a collection 

 of Cornish and Devon plants to the Museum of the Launceston 

 Historical and Scientific Society. 



Criticism that the present Supplement is burthened with 

 records of well-known plants is perhaps disarmed by the explan- 

 ation that Davey's policy of recording localities for plants other 

 than those which are common and generally distributed 

 throughout the County has been continued. The Supplement 

 is an expansion of a local Flora, and intended as a guide for 

 amateurs resident in or on a visit to the County, who like to 

 know what plants, in addition to rarities, they may expect to 

 find in any part of it which they are exploring. It has been well 

 said by Mr. J. G. Baker, formerly Keeper of the Kew Herbarium, 

 that ** botanists coming into Cornwall from the eastern or 

 central parts of England find much to interest them in seeing 

 how abundant some of the specially western species we-, and 

 how many plants, which they take for granted are likely to be t 

 common, are found to be rare or even altogether absent." 



We would impress on amateurs the importance of not 

 merely recording, but preserving, for expert examination, 

 voucher specimens of plants as to the identity of which there 

 may be any doubt, or which are likely to be challenged. In 

 the absence of such specimens, it has been found necessary to 



