316 APPENDIX. 



No. X. Geographical range of Plants. 



The physical character of this county is not such as to limit 

 the range of plants, nevertheless there are a few plants which 

 seem to have the limits of their geographical districts within it. 

 In all probability more complete information will prove that they 

 all extend into the neighbouring counties. The following is a list 

 of the plants which, as far as my information extends, have their 

 northern, southern, or western limit in Cambridgeshire. 



I. Plants not known certainly to grow to the north of Cam- 

 , bridgeshire. 



Bunium Bulbocastanum. Orobanche Picridis. 



(Bnanthe fluviatilis. Ajuga Chamsepitys. 



Seseli Libanotis. Primula elatior. 



Caucalis latifolia. Statice caspia. 



Filago spathulata. Thesium humifusum. 



Senecio campestris ? Euphorbia platyphylla. 



Villarsia nymphseoides. Herminium monorchis. 



Melampyrum cristatum. Phleum Boehmeri. 



II. Plants not certainly known to grow to the west of Cam- 

 bridgeshire. 



Silene otites. Primula elatior. 



Medicago sylvestris. Phleum Boehmeri. 



M. minima ? Apera interrupta. 

 Trifolium ochroleucum. 



III. Plant which appears to have its southern limit in this 

 county. 



Senecio paludosus. 



IV. When we compare our Flora with that of Great Britain, 

 as shewn by the arrangement of all the native British species 

 contained in Watson's CybeleBritannica (iv. 234 — 281), it is found 

 that of the 120 commonest species we only want one, 



Lychnis diurna. 



