Ae 
232 : a nithirel ‘thd Physiological Botany. 
of clover and lucerne, spreading itself centringatly eee ee 
single points, and entirely destroying the vegetation. C. Bh: 
epithymum is indigenous, chiefly on gorse and heather, = nn 
Of the species of ie 
Orobanche or broom- 
rape, which mostly grow 
on the roots of wild 
plants, the only ones of 
practical importance are 
O. rubens and ramosa. 
_ Fic. 378.—I. 2 a piece of a branch of an apple-tree cut through lengthwise, into tae: 
which a young mistletoe-plant wz has driven its sucking-roots s (reduced) ; II. 
Cuscuta Trifolti: A, parasitic upon clover (reduced) ; B,a separate inflorescence 
(natural size). 
The former occurs especially on clover, while the latter 
mostly attacks hemp, but also tobacco and nightshade (.So/a- 
num); (see Fig. 346, p. 166). 
The remaining phanerogamic parasites named above 
have but little scientific interest ; to them may be added’ 
the various species of AZelampyrum, Rhinanthus, and Pedt- 
cularis. No further notice is required of the phanerogamic 
parasites of tropical and subtropical primeval forests, &c., *. 
belonging to the natural orders Balanophoracez, Raffles- 
iaceze, Loranthacez, &c. ak ag 
Besides these parasites, there are various flowering pla, ee 
