Page 127 - Ultimate Visual Dictionary (DK)

CROSS-SECTION THROUGH
Apical bud scale MATURE STEM OF BISHOP PINE
(Pinus muricata)
Apical bud
Annual ring
Shoot
apex
Immature needle
(foliage leaf)
Needle
(foliage
leaf) bud

Bud scale
Heartwood
(supportive,
Scale leaf inactive
secondary
xylem)
MICROGRAPH OF LONGITUDINAL SECTION
THROUGH SHOOT APEX OF PINE Branch trace
(Pinus sp.) (vascular bundle
supplying branch)
Pith
Hypodermis
Medullary ray (cell layer below
(extension of pith) epidermis)
Cortex Base of dwarf shoot
(layer between Pith
epidermis and
vascular tissue)
Dwarf shoot trace
(vascular bundle
supplying dwarf Sapwood
shoot)
Secondary (active secondary
xylem Epidermis xylem)
(outer layer
Vascular Phloem of cells) Phloem
tissue Bark Periderm
Primary Resin canal (outer layer
xylem
of bark)
MICROGRAPH OF CROSS-SECTION Cortex
THROUGH YOUNG STEM OF PINE (layer between
(Pinus sp.) phellem and
Cortex vascular tissue)
(layer between Resin canal
phellem and Secondary Primary
vascular tissue)
xylem xylem
Endodermis
Phellem
(inner layer (protective
of cortex)
outer layer)
Secondary
Phloem xylem

Primary
Phellem
(protective xylem Resin canal
Phloem
outer layer)
MICROGRAPH OF CROSS-SECTION MICROGRAPH OF CROSS-SECTION
THROUGH YOUNG ROOT OF PINE THROUGH MATURE ROOT OF PINE
(Pinus sp.) (Pinus sp.)

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