Page 165 - Ultimate Visual Dictionary (DK)

EPIPHYTIC AND P ARASITIC PLANTS
LONGITUDINAL SECTION THROUGH EPIPHYTIC BROMELIAD ROOT PARASITE
Scarlet star Broomrape
(Guzmania (Orobanche sp.)
lingulata) Stem of host plant
Bract
(leaflike Leaf (part of
structure) rosette of leaves)
Immature
bracts

Flower bud
of broomrape
Overlapping leaf bases
in which rainwater is Flower of
trapped broomrape
Leaf of
host plant
Stem of
Stem
broomrape
Tuber of broomrape attached to
Immature host plant’s roots through
flowers haustoria (penetrating organs Shoot of
that absorb nutrients from host’s broomrape
Swollen stem base vascular tissue)

STEM PARASITE
Dodder
(Cuscuta europaea)
Tip of dodder
stem showing Inflorescence
circular Main root
movement (spike) of dodder of host plant
flowers
around
host plant
Point of
attachment Lateral root of
of dodder stem host plant
to host stem
Haustorium
(penetrating organ that
absorbs nutrients from Vascular tissue
Leaf of host’s vascular tissue) of dodder
host plant
Union of host and dodder
vascular systems
Thread-like
stem of dodder Stem of
twined around dodder
stem of host
plant
Stem of
host plant
Vascular
tissue of Phloem
host plant
Xylem

Stem of
host plant
EXTERNAL VIEW OF PLANT MICROGRAPH OF CROSS-SECTION THROUGH STEM
PARASITIZED BY DODDER OF PLANT PARASITIZED BY DODDER

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