62 POISONOUS PLANTS. 



(i) IRIS FLORENTINA. 

 (2) IRIS VARIEGATA. (3) IRIS AMGENA. 



(4) IRIS NEGLECTA. 

 (5) IRIS RETICULATA. {Cultivated in Britain) 



(l) FLORENTINE IRIS.— ORIS ROOT PLANT.— ORRICE ROOT 



PLANT. 



(2) VARIEGATED IRIS. (3) DELICATELY TINTED IRIS. 



(4) GERMAN FLAG IRIS. — BROAD-LEAVED FLAG IRIS. 



(5) EARLY BULBOUS IRIS. 



(l) Iridacea. — Rhizome cylindrical ; I2in. ; rarely branched ; 

 ringed. — Leaves sword-shaped ; equitantly sheathing below. — 

 Flowering-stem much exceeding leaves ; branched ; flowers 

 solitary; terminal. — Fruit a capsule; lin. ; 3-celled ; faintly 

 triangular. — Perenn. — May ; white. 



Toxic principle. — IRIDIN. 



(2, 3 & 4) IridacecB. — Flowering-stem obovate-unguiculate, 

 erect, clustered, 4-5 flowered, glaucous, forked, 3ft. ; May. 

 Perenn. — Leaves tufted, few, sword-shaped, glaucous. 



Toxic principle. — IRIDIN. 



(5) hidacea. — Flowers variously colored ; Feb.-March. — 

 Leaves generally 2 to a tuft, as high as flower at flowering-time, 

 afterwards growing to ift. or more. 



Toxic principle. — IRIDIN, also contained in I. tuberosa and 

 others. Viola canina odovata, V. palmensis, V. sylvatica, 

 Y. tricolor. 



BUXUS SEMPERVIRENS {British). 



COMMON BOX TREE. 



Euphorbiacecs. — An evergreen shrub. — Leaves oblong-ovate, 

 convex, shining. — Chalk hills, local, 3-i5ft. — April. Yellowish. 

 — Stem contains a milky juice. 



Toxic principles.— BUXl'SE, BUXIDINE, OIL OF EUPHOR- 

 BIA, also contained in the varieties : — angustifolia, arboresceus, 

 argentea, aurea, myrtifolia, pyramidata, rosmarlnifolia, 

 rotundifolia, suifrnticosa. 



