VEGETABLE IRRITANTS. 6i 



GRATIOLA OFFICINALIS {S.£. Europe). 



HEDGE HYSSOP. — POOR MAN'S HERB. 



ScrophulariacecB. — In dense masses ; marshes. — Root creep- 

 ing, jointed. — Stem 2ft., erect, a little branched. — Leaves ^va.. 

 opp., smooth, obtuse, lanceolate. — Flowers solitary, on long- 

 stalk, fr. 2 bracts, below calyx ; corolla white striped with red, 

 tube longer than calyx, covered inside with yellow hairs. — Fruit 

 a 4-sided capsule, ovate, acuminate ; seeds many. 



Toxic prindp/e.—O^kTlOLlN. 



POLYGALA SENEGA (JVortk America). 



SENECA SNAKE ROOT. 



PolygalacecB. — Leaves alternate, sessile, lanceolate. — Stems 

 numerous, slender, erect. — Flowers crowded in a terminal spike 

 petals 3. — Seeds 2. — 6-i2in. Perenn. May and June. Pink. 



Toxic principle. — POLYGALIN, also contained in P. amara. 



IRIS PSEUDACORUS {British). 



YELLOW IRIS. — YELLOW FL.\G. — FLEUR DE LUCE. — JACOB'S 

 SWORD. — WATER FLAG. 



IridacecB. — Inner segments of perianth smaller than the 

 petaloid stigmas, the outer very broad. — Seeds angular. — 

 Watery places. Common. 3-4ft. Perenn. July. Yellow. 



Toxic principle. — IRIDIN. 



IRIS FCETIDISSIMA {British). 



STINKING IRIS.— STINKING GLADWIN. —ROAST-BEEF PLANT.— 

 GLADER. — GI.ADIN. — BLUE SEGGIN. 



IridacecB. — Inner segments of perianth spreading, outer nar- 

 row. — Seeds rounded. Foetid. — Pastures and thickets. i-2ft. 

 Perenn. June-Aug. Purple, sometimes yellow.— Seeds orange. 



Toxic principle.— l^lDm. 



