BOTANY 



PoLYGALEJE 



Polygala oxyptera, Reichb. 



CARYOPHYLLE.K 

 Silene conlca, L. 



noctiflora, L. 



Arenaria (Alsine) tenuifolia, L. 



LEGUMINOSJE 



Trifolium ochroleucum, L. 

 Astragalus hypoglottis, L. 

 Hippocrepis comosa, L. 

 Vicia (Ervum) gracilis, Lo'ucl. 



lilvatica, L. 

 Lathyrus aphaca, L. 



silvestris, L. 



ROUCES 

 Prunus cerasus, L. 



CRASSULACEJE 

 Sedum fabaria, Koch 



ONAGRARIE./E 



Epilobium roseum, Schreb. 



UMBELLIFERJE 



Smymlum olusatrum, L. 

 Bupleurum rotundifolium, L. 

 Apium graveolens, L. 

 Carum segetum, Benth. 



(Bunium) bulbocastanum, Koch 

 Sesseli libanotis, Koch 

 (Enanthe Lachenalii, Gmel. 

 Caucalis daucoides, L. 



RUBIACE.E 



Galium Witheringii, Sm. 



erectum, Huiis. 



VALERIANEJE 

 Valeriana officinalis, L. 

 Valerianella auricula, DC. (rimosa, Bast.) 



COMPOSITE 



Filago spathulata, Presl 



Senecio (Cineraria) campestris, DC. 



Centaurea calcitrapa, L. 



Crepis biennis, L. 



taraxacifolia, Thutll. 



MONOTROPEJE 

 Hypopithys multiflora, Scop. 



PRIMULACE^ 

 Anagallis cxrulea, Schreb. 



CONVOLVULACEJE 



Cuscuta europaea, L. 



SCROPHULARINE. 



Verbascum blattaria, L. 

 Antirrhinum orontium, L. 

 Linaria spuria, Miller 

 Melampyrum arvense, L. 



cristatum, L. 



OROBANCHEJE 



Orobanche major, L. 



minor, Suit. 



LABIATE 



Mentha pulegium, L. 

 Ajuga chamaepitys, Schreb. 



CHENOPODIACEJE 



Chenopodium vulvaria, L. 



ficifolium, Sm. 



hybridum, L. 



POLYGON AC EJE 

 Polygonum maculatum, Dyer et Trimen 



SANTALACEJE 

 Thesium linophyllum, L. (humifusum, DC.) 



EUPHORBIACE.S 

 Euphorbia platyphyllos, L. 



ORCHIDEJE 



Cephalanthera pallens, Rich. 

 Orchis ustulata, L. 

 Herminium monorchis, Br. 



IRIDE/E 

 Iris foetidissima, L. 



CYPBRACE. 

 Carex Jioica, L. 



stricta, Good. 



xanthocarpa, Degl. (1 hybrid) 



GUMMBJI 



Phleum phalaroides, Koel. 



Bromus racemosus, L, 



Brachypodium pinnatum, Beauv. 



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



DISTRICT III. THE THAME 



The very small portion of the extreme west of the county which is in this district forms 

 a tongue-like protrusion into Buckinghamshire, being bounded by that county on all sides but 

 the east, where the Colne district forms the boundary. 



The small tributary streams of the Thame, rising near Tring, are intercepted by the 

 reservoirs which supply the Grand Junction Canal, all of which are in this district. The 

 Thame soon leaves our county, and, flowing westward north of Aylesbury to below Dorchester 

 in Oxfordshire, there unites with the Thames ; or, as Chauncy says (Hist. Antiq. Herts), ' then 

 congratulates the Isis ; but both emulating each other for the name, and neither yielding, they 

 are complicated by that of Thamisis.' 



The district lies high : a mile north of Tring is the summit-level of a system of canals 

 which radiate to the north, west, south-west, and south-east. The Chalk terminates near the 



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