IRRITANT POISONS 35 



EXOGONIUM PURGA. 

 IPOMCEA PURGA {West Mexico). 63. 



JALAP PLANT — MORNING GLORY. 



Convolvulacece. — Herbaceous twiner. — Stems numerous; 

 slender; twisted; 12 ft.; arising from crown of tubercular — 

 Roots, which are nearly globular; tapering; mottled brown; 

 white inside. — Leaves alternate; on long stalks; cordate; 

 pointed ; entire. — Flowers in small axillary cymes of 3 ; corolla 

 2iins. ; salver-shaped; glabrous; tube 2 ins., contracted on 

 joining limb. — perennial; June-September; purplish-pink. 



Toxic Principle.— COJ'iYOLV'ULm, also contained in I. 

 turpethum, I. purpurea. 



The crimson morning dazzled me mine eyes. — Labor: " A S'pring Morning.'^ 

 CONVOLVULUS SCAMMONLA [Cultivated in Britain). 64. 



SCAMMONY. 



Convolvulacece. — Root very long; perpendicular; straight; 

 unbranched; woody; exuding milky juice when wounded. — 

 Stems numerous; twining; hollow. — Branches widely spread- 

 ing. — Leaves alternate ; scattered ; triangular. — Flowers 

 numerous; solitary; bracts opposite; small; leaf -like. Corolla 

 widely funnel-shaped; 2 ins. — Fruit a capsule; J in.; not 

 exceeding persistent sepals. — Seeds 4; angular; chocolate. — 

 perennial; cream, pink stripes beneath. 



Toxic Principle, — JALAPIN, also contained in C. oriza- 

 biensis. 



Puck is abroad, and his faery hand 



Dance in a ring where the moonflowers glow. 



H. Simpson: " A Faery Flute.'' 



CROTON TIGLIUM [East Indies). 65. 



CROTON OIL PLANT. 



Euphorbiacece. — A small tree. — Branches many; spreading. 

 — Leaves alternate, on longish stalks; ovate-lanceolate; entire. 

 — Flowers arranged on short pedicels, on spiked raceme; 



