BOTANY 



Ulex nanus, Forst. 

 Medicago falcata, L. 

 Trifolium subterraneum, L. 

 Hippocrepis comosa, L. 

 Lathyrus aphaca, L. 



(Orobus) tuberosus, L. 



silvestris, L. 



ROSACE* 



Prunus cerasus, L. 

 Geum intermedium, Ehrh. 

 Rosa stylosa (v. systyla), Bast. 

 Crataegus monogyna, jacq. 



mentioned (p. 28). The Bulbourne below Berkhamsted, the Gade below Two Waters, and 

 the Colne below Rickmansworth, are frequently incorporated with the Grand Junction CanaL 

 Leaving our county near Harefield, the Colne, flowing southwards, passes Uxbridge, where k 

 begins to divide into numerous irregularly anastomosing channels which have several mil It 

 into the Thames at and above Staines. 



To the presence in the valley of the Ver of an old city, more interesting in its a 

 tions than any other in the kingdom, is due the existence in Hertfordshire of Diplstaxis 

 folia, Silent nutans, and Hieradum muranan, for they grow nowhere in the county but on old 

 walls in St. Albans. Colney Heath, near the head of the Colne, is of much botanical interest, 

 chiefly owing to its marshes and swampy meadows. It is our only habitat for the very rare 

 Ljthrum bjfsopifiKa, and also for TtndaRa nudicauRs, while we nave only one other locality, 

 a different one in each case, for four of its plants Radiala hmda (Northaw), Ctsttmmcmha 

 minimus (Moor Park), Cuscuta epitbjmum (No Man's Land, St. Albans), and Pttanugettn acmti- 

 foKui (London Colney). 



The rarer plants of this district and those peculiar to it make a rather long list. They 

 are 



RAKUSCCUCEJE LTTHRJUUIM 



Anemone pnlsatilla, L. Lj&nm bjsufifiBa, L. 



Helleborus foetidus, L. 

 riridb, L. 



PAPAVZRACI* 



Papaver Lecoqii, Lamotte 



FITUARIACLS 

 Fumaria Vaillantii, Loisel. 



CRUCIFIX* 



Nasturtium amphibium, Br. 

 Dtntaria buttnfera, L. 

 Dipbtaxis tenuifoRa, DC. 

 Erophila praecox, DC. 

 Lepidium ruderale, L. 

 Iberis amara, L. 

 TeesdaHa nudicauKs, Br. 



POLYGAUB 



Polygak oiyptera, Reicbb. 



CARYOPHYLLEJE 

 Silene nutans, L. 



Cerastium quaternellum, Fenlz. 

 Arenaria (Alsine) tenuifolia, L. 



LlNEJE 



Radiola Knaides, Gmel. 



GERANIACEA 

 Geranium ntundifoKum, L. 



CRASSULACE* 



Sedum fabaria, Koch 



OXAGRAUEJE 



Epilobium roseum, Scbrtb. 



UMBELLJFEIJE 



Buplenrom rotundifolium, L. 



Carom (Buniom) bulbocastanum, Kxb 



Cicuu virosa, L. 



(Enantht enccata, L. 



Caucalis dancoides, L. 



RVBIACEJE 



Galium erectom, Huds. 



VALERIANLS 



Valeriana officinalis, L. 

 Valerianella auricula, DC. 



COMPOSITE 



Pnlicaria vulgaris, Gtfrtn. 

 Filago apicuku, G. E. Sm. 



spathulata, Presl 



Senecio (Cineraria) campestris, DC. 

 Arctinm intermedium, Lange 



nemorosum, Lej. 

 Centaurea calcitrapa, L. 

 CarJutts tnuiflorus, Curt. 

 Crepis uraxacifolia, Thrill. 

 Hieraciitm muronun, L. 



CAUPANULAC&K 



Campanula rapunculus, L. 



ERICACEJE 



Vaccinium myrtyUus, L. 

 Erica cinerea, L. 

 Pyrola minor, Sto. 



ntundifoRa, L. 



PRIMULACE* 



Ccntunculus minimus, L. 



GENTIANEJK 



Gentiana campestris, L. 



germanica, Willd. 



BoRAGINEjE 



Cynoglossum montanum, Lamk. 



55 



