590 PHARMACEUTICAL BOTANY 
OrDER TUBIFLORZ OR POLEMONIALES 
CoNVOLVULACE2 OR Morninc Giory Famity.—Frequently 
herbaceous, more rarely sub-woody or woody, perennial climb- 
ing plants with underground parts sometimes swollen into 
tuberous roots (Jalap, Sweet Potato, Wild Man of the Earth). 
Stems rarely short, upright or tufted, usually elongate and cir- 
Fic. 448.—Convolvulus scammonia—Branch.  (Sayre.) 
cumnutating in action. Vascular bundles frequently _bicol- 
lateral. Leaves alternate, simple, exstipulate, varying from 
cordate to cordate-sagittal, to broad-reniform to reniform, 
palmately lobed to palmatifid to palmately-compound (Jpomea 
shows all these transitions). Stem and leaves frequently contain 
a dull, viscous, watery to milky-white, resinous juice. Inflo- 
rescence a scorpioid cyme, becoming reduced in some forms to 
