VEGETABLE IRRITANTS. 45 



SIUM ANGUSTIFOLIUM {British). 



cow CRESS. — FOOL'S WATER CRESS. — NARROW-LEAVED 

 WATER PARSNIP. 



UtnbellifercE. — Leaves pinnate ; leaflets unequally lobed and 

 serrated. — Umbels opposite the leaves. — Ditches. Sin.-ift. 

 Perenn, — July and Aug. White. 



TAXUS BACCATA {British). 



COMMON YEW.— PALM. 



Conifera. — An evergreen tree. — Leaves linear, in 2 rows ; 

 crowded. — Woods on chalk. — March and April. Yellowish. — 

 Berries pink. 



Toxic principles.— T^KHm-E, OIL OP YEW. 



CYSTISUS LABURNUM {Cultivated in Britain). 



COMMON LABURNUir. — BEAN TREFOIL. — HE BROOM. — FALSF, 

 EBONY. — GOLDEN RAIN. — GOLDEN CHAIN. 



Le,!^u?ninoscE. — Tree ; 30ft. — Flowers in drooping racemes ; 

 corolla papilionaceous. Standard large, ovate. — Pedicels and 

 calyces clothed with adpressed pubescence. — Pod with upper 

 suture keeled. — Leaves petiolate, digitate, trifoliate ; leaflets 

 ovate-lanceolate; pubescent beneath. — April-June; yellow. 



Toxic principle. — CYSTISINE, also contained in C. hiFsutus, 

 C. alpinus and others, Ulex europsens, Saphora tomentosa, S. 

 speciosa. 



PARIS QUADRIFOLIA {British). 



HERB PARIS. — FOUR-LEAVED GRASf —ONE BERRV. — TRUE 

 LOVE. 



Trilliacea. — ^Leaves ovate, 4 in a whorl beloiv the flower. 

 Dark green. —Woods. Perenn. I ft. — May and June. Green; 

 Berry black. 



Toxic principle.— VfLRWim. 



MERCURIALIS PERENNIS {British). 



DOG'S MERCURY.— HERB MERCURY. — WILD SPINACH. 

 KENTISH BALSAM. 



Euphorbiacece. — Stem simple. — Leaves rough. — Fertile flowers 

 on long stalks. — Woods and thickets. Common. i-2ft. — 

 Perenn. — April and May. Green.— Stem contains a milky sap. 



To.xic principle. -~0\l^ OF EUPHORBIA. 



