LOCALITIES. 



173 



uplands to the south of it ; near Hertford it is joined by two affluents. 

 The subsoil is alluvial in the valley ; gravelly with underlying chalk on 

 the slopes. Near Hertford and east of Hatfield Park are chalk pits ; these, 

 with the woods, where accessible, and the waste gravelly fields of occasional 

 occurrence, the roadsides, and meadows by the river, offer opportunities 

 of obtaining specimens of a few plants not frequent elsewhere near London. 



*Adoxa moschatellina (woods). 



Alchemilla vulgaris (near Essendon and 

 Brickendon, and meadows near Stan- 

 borough). 



Allium vineale (dry knolls in the mea- 

 dows between Hertford and Ware). 



Anthemis arvensis (Gallows Plain, Hert- 

 ford). 



*Anthyllis Vulneraria (chalk pits Hert- 

 ford, Essendon, and near Hattield Park). 



Arabis perfoliata (frequent N.W. of 

 Hertford, and between Hatfield Park 

 and Cole Green). 



Asperula cynanchica (pits, Hertford). 



Atropa Belladonna (Hatfield Park). 



Barbarea arcuata (between Hertford and 

 Ware Park). 



*Brachypodium pinnatum (chalk pit near 

 Hertford). 



Bupleurum rotundi folium (Mangrove 

 Lane, fields adjoining the brook). 



Calamintha Acinos (Gallows Plain). 



Campanula glomerata (pit behind Hert- 

 ford Union workhouse). 



Carduus acaulis (about Hertford, scarce) ; 

 *nutans (about Hertford, scarce). 



Carex acuta; Pseudo-cyperus (between 

 Hertford and Ware) ; pallescens (ponds 

 S. and S.W. of Hertford); pulicaris 

 (woods S. of Hertford) ; strigosa (Stan- 

 borough and elsewhere). 



Carlina vulgaris (about Hertford, scarce). 



Centaurea Cyanus (fields, Hertford, 

 scarce). 



Ceratophyllum aquaticum (between 

 Hertford and Ware). 



Chlora perfoliata (pit near Hatfield Park). 

 *Clematis Vitalba (about the chalk pits). 



Cynoglossum officinale (Hatfield Park and 

 Ware Park). 



Dianthus Armeria (Mangrove Lane ; 

 Gallows Plain; gravel pits near Hat- 

 fieid). 



Dipsacus pilosus (about Bayford, Essen- 

 don and Little Berkhampstead). 



Prosera rotundifolia (Hatfield woodside). 



Eleocharis multicaulis (bog by Kentish 

 Lane, Hatfield). 



Epilobium roseum (Bayford, near the 

 church, in a ditch by the road to Hert- 

 ford). 



Epipactis latifolia (woods, south) ; palus- 

 tris (wet pasture by the brook, East-end 

 Green, Hertingfordbury). 



Erigeron acris (gravel pit, Welwyn road 



and about Baytord, &c.). 

 Festuca sciuroides (between Hertford 



and Ware). 

 Filago gallica (field right of the road 



from Hertford to Welwyn, and footpath 



between Bayford House and Bayford 



wood). 

 Fumaria capreolata (field near Easney 



Park wood ; footpath to Ware). 

 Galium tricorne (fields near). 

 Gastridium lendigerum (gravelly field 



near N.E. boundary of Hatfield Park). 

 Genista tinctoria (about Bayford and 



Little Berkhampstead). 

 Geranium columbinum (about Hert- 

 ford). 

 Helianthemum vulgare (pits, Essendon- 



bury and near Hatfield Park, Gallows 



Plain). 

 Helleborus viridis (Watery Hall Farm, 



near Hertingfordbury, in woods on the 



chalk). 

 Herminium Monorchis (chalk-pit E. side 



of Hatfield Park). 

 Hieracium boreale (?) (frequent, near 



Hertford, Thieves' Lane, Hertingford- 

 bury). 

 Hottonia palustris (between Hertford and 



Ware). 



Hyoscyamus niger (Mead Lane, Hert- 

 ford ; Ware Park ; Hatfield Park). 

 Hypericum Androsa?mum (lanes about 



Essendon, Little Berkhampstead and 



Bayford). 

 Inula Helenium (Mangrove Lane, by a 



pond near Blue Close). 

 Juncus diffusus (near Cole Green). 

 Koeleria cristata (between Hertford and 



Ware). 

 Mentha rotundifolia (between Hertford 



and Essendon, opposite Watery Hall 



Farm). 



*Nepeta Cataria (by pit near Hertford). 

 Nymphaea alba (in the Lea at Bayford- 



bury Farm). 



*(Enanthe fluviatilis (in the Lea). 

 Onopordum Acanthium (Ware road, In 



a field between Gallows Plain and Ball's 



Park). 

 Ophrys apifera (field towards Bayford, 



one mile from Hertford). 



