Dicotyledons with Gamopetalous Flowers . 
79 
Natural Order 
OROBANCHACEiE. 
Diagnosis. —Herbs, destitute of green leaves, parasitical upon the roots 
of other plants. Corolla hypogynous, irregular, more or less 2-lipped. Sta¬ 
mens epipetalous, didynamous. Ovary 1 -celled, with indefinite parietal ovules. 
Distribution. —A small Natural Order, widely dispersed in both Hemispheres ; most numerous 
in the North Temperate zone of the Old World : very rare in South America, and represented by a 
solitary, perhaps introduced, species in Australia, which is also common to the Mediterranean region. 
Number of British Genera, 2 ; Species, 8. 
Stem rarely branched, scaly, brown or purplish ; pale in Tooth wort ( Lathrcea ). 
USES, &c.—Some species have had medicinal properties ascribed to them, but none are of importance. The 
species generally affect special nurse-plants. The tallest British species, Great Broomrape ( Orobccnche major), is 
usually found upon Whin or Broom ; the Red Broomrape ( 0 . rubra') affects Thyme, and the Blue Broomrape ( 0 . 
ccerulea), Yarrow. Toothwort ( Lathrcea squamaria) usually grows upon the roots of the Hazel. 
Natural Order 
LENTIBULARIEdT Tab. 64. 
Diagnosis. — Herbs usually aquatic or of boggy ground, with radical, 
simple, or submerged and much dissected leaves. Corolla hypogynous, 
two-lipped. Stamens epipetalous, diandrous. Ovary 1 -celled with free 
central placentation. 
