A HISTORY OF HERTFORDSHIRE 



CONVOLVULACE.S 



Cuscuta europasa, L. 



efithymum, Murr. 



PLANTAGINE.S 

 Litorella lacustris, L. 



SCROPHULARINE.S 



Verbascum blattaria, L. 



virgatum, With. 

 Linaria spuria, Miller 

 Limosella ajuatlca, L. 



OROBANCHE^: 

 Orobanche minor, Suit. 



CHENOPODIACE/E 



Chenopodium vulvaria, L. 



ficifolium, SOT. 



PoLYGONACE^ 



Polygonum minus, Huds. 



Rumex palustris, SOT. (limosus, Thuill.) 



EUPHORBIACE.S: 



Euphorbia platyphyllos, L. 

 Mercurialis annua, L. 



SALICINEJE 

 Salix russelliana, SOT. 



HYDROCHARIDEJE 

 Hydrocharis morsus-ranae, L. 



ORCHIDEJE 

 Malaxis paludosa, Sw. 

 Cephalanthera pallens, Rich. 



ensifolia, Rich. 

 Orchis ustulata, L. 



militaris, L. 

 Herminium monorchis, Br. 

 Habenaria bifolia, Br. 



LILIACETE 



Ruscus aculeatus, L. 

 Polygonatum multiflorum, All. 

 Fritillaria meleagris, L. 



JUNCE* 



Juncus diffusus, Hoppe 



squarrosus, L. 

 Luzula Forsteri, DC. 



NAIADACEJE 



Potamogeton rufescens, Schrad. 



acutifolius, Link 



obtusifolius, Mert. et Koch 



CYPERACEJE 



Ekochans acicularis, Br. (Hooker Heleocharts) 

 Scirpus caricis, Retz. (Blysmus compressus, Panz.) 

 Carex paradoxa, Willd. 



Icevigata, Sm. 



GRAMINEJS 

 Setaria viridis, Beauv. 

 Alopecurus fulvus, SOT. 

 Calamagrostis lanceolata, Roth 

 Gastridium lendigerum, Gaud. 

 Bromus racemosus, L. 

 Hordeum silvaticum, Huds. (Elymus europaeus, L.) 



DISTRICT V. THE BRENT 



This is the smallest district, only four or five square miles of a tongue of the county 

 somewhat similar to that of the Thame district being in the catchment-basin of the Brent. 

 It is bounded on the east by a detached portion of the Lea district, on the north-west by the 

 Colne district, and on the north and south by Middlesex. It is entirely on the London Clay. 



The Brent rises in Middlesex half a mile from Barnet Gate in Herts, and after a run of 

 four miles leaves our county, flows past Finchley, through the Brent Reservoir, and, joining 

 the Grand Junction Canal at Hanwell, enters the Thames at Brentford. 



This is an interesting district, chiefly owing to the presence of Totteridge Green and 

 its ponds, in which grow Ranunculus lingua and Acorus calamus, the former however having 

 been planted and therefore not being entitled to a place in the list of species. Totteridge 

 Green is our only locality for Damasonium stellatum. It was first recorded there in 1805, by 

 1849 '* na< ^ become very scarce, and it was last seen in 1855. Chenopodium glaucum has been 

 seen much more recently in its only locality, Totteridge. 



Many common plants are not recorded for the district, perhaps partly from its small size, 

 but chiefly from its flora not having been thoroughly investigated. 



The only indigenous plants in this district which are rare are the following 



CARYOPHYLLEJE 

 Dianthus deltoides, L. 

 Cerastium quaternellum, Fenk,. 



ROSACEJE 

 Prunus cerasus, L. 



ONAGRARIEJE 

 Epilobium roseum, Scbreb. 



COMPOSITE 



Pulicaria vulgaris, Gtertn. 

 Anthemis nobilis, L. 

 Arctium nemorosum, Lej. 



BORAGINEA 

 Symphytum tuberosum, L. 



