Cambium Collection

Silver birch twig, SEM
Silver birch twig. Coloured scanning electron micrograph (SEM) of a section through a silver birch (Betula pendula) twig. At the centre of the twig (top centre left) is the pith

Pine tree stem, light micrograph
Pine tree stem. Coloured light micrograph of a cross-section through the stem of a pine tree. (Pinus sp.). The red wood (xylem, lower left) has resin canals in it, which are outlined in green

Black Bear - damaged tree. Bears strip the bark and then eat the thin cambium layer
TOM-1364 Black Bear - damaged tree. Bears strip the bark and then eat the thin cambium layer. Washington; Olympic National Park, USA

Bletia purpurea - Bletia purpurea. Longidunal and traverse section of the ovary. Watercolour by Franz Bauer, 1801. Paper, watercolour. Botany Library, Bauer Unit, Unfinished Drawings of Plants 3: no

Pine root, light micrograph
Pine root. Light micrograph of a section through the root of a pine (Pinus sp.) tree. From outer to inwards: outer layer of peridium (dark red); cortex - made up of parenchyma cells (red)

Marrow stem, light micrograph
Marrow stem. Light micrograph of a section through the stem of a marrow (Curcurbita sp.), showing the sieve plates in the phloem. A single collateral vascular bundle can be seen

Sage stem, light micrograph
Sage stem. Light micrograph of a section through a primary stem of a scarlet sage (Salivia splendens) plant. The outer stem is covered with a thin epidermis (green) that contains stomata

Rhubarb root, light micrograph
Rhubarb root. Light micrograph of a section through the root of a rhubarb (Rheum sp.) plant. The primary cortex has been shed by the formation of a circular meristem, the periderm

Plant root development, artwork
Plant root development. Artwork showing the first three stages in the development of a plant root. The first of these three stages (upper left)

Plant root development, diagram
Plant root development. Diagram showing the the fourth (left) and fifth (right) stages in a series showing the development of a plant root

Flax plant stem, light micrograph
Flax plant stem. Light micrograph of a transverse section through a stem of the flax plant (Linum usitatissimum). The layers from outer to inner (some very thin) are the epidermis (bottom)

Peanut plant stem, light micrograph
Peanut plant stem. Light micrograph of a transverse section through a stem of the peanut plant (Arachis hypogaea). Below the stems outer layer (epidermis) is a cortex of parenchyma cells (blue)

Stinging nettle stem, light micrograph
Stinging nettle stem. Polarised light micrograph of a transverse section through a stem of the stinging nettle plant (Urtica dioica)

Lilac stem, light micrograph
Lilac stem. Light micrograph of a transverse section through the young woody stem of a lilac (Fraxinus excelsior) tree. The thick epidermis (solid green) is being sloughed (pushed/broken)

Ash stem, light micrograph
Ash stem. Light micrograph of a transverse section through the woody stem of an ash (Fraxinus excelsior) tree showing four growth rings (concentric circles)

Oleander stem, light micrograph
Oleander stem. Light micrograph of a cross-section through the stem of an oleander (Nerium oleander) tree. The outer layer is a thick cuticle (yellow) and then cork cambium (blue-green)

Young pine tree stem, light micrograph
Young pine tree stem. Light micrograph of a transverse section through a two and a half-year-old stem of a pine tree (Pinus sp.)

Dyers greenweed stem, light micrograph
Dyers greenweed stem. Polarised light micrograph of a transverse section through the stem of a dyers greenweed (Genista tinctoria) plant

Sunflower root, light micrograph
Sunflower root. Polarised light micrograph of a transverse section through the root of a sunflower (Helianthus annuus) plant

Rose stem, light micrograph
Rose stem. Light micrograph of a cross-section through the stem of a rose (Rosa sp.). The three triangular protrusions are thorns, which protect the plant from being eaten by animals

Cedar tree stem, light micrograph
Cedar tree stem. Light micrograph of a transverse section through a stem of a cedar tree (Thujopsis dolobrata). The four ridges on the outer surface are microphyllous leaves

Squash root, light micrograph
Squash root. Light micrograph of a transverse section through a squash (Cucubita sp.) root. The large vessels (red) are xylem cells, which transport water. Parenchyma tissue is blue

Radish root, light micrograph
Radish root. Light micrograph of a transverse section through the root of a radish (Raphanus sativa) plant. The outer layer is cork cambium (red)

Eucalyptus stem, light micrograph
Eucalyptus stem. Light micrograph of a transverse section through a one-year-old stem of a Eucalyptus (Eucalyptus globulus) plant

Yew tree leaf, light micrograph
Yew tree leaf. Light micrograph of a transverse section through the leaf (pinna) of a yew tree, (Taxus baccata). The structure has xerophytic (drought plants) characteristics

Bracken rhizome, light micrograph
Bracken rhizome. Light micrograph of part of a cross-section through a rhizome from the bracken Pteridium aquilinum. The centre of the rhizome is off top, while the outer surface is off bottom

Cucumber stem, light micrograph
Cucumber stem. Light micrograph of a cross-section through part of a vascular bundle from a cucumber (Cucurbita sp.). This vascular bundle is from the stem of the cucumber

Oak burr on the trunk of an oak tree (Quercus robur). Burr (or burl) is deformed wood caused by cambium. Cambium is layers of tissue that are the source of cells for secondary growth

Mountain andromeda stem, light micrograph
Mountain andromeda stem. Light micrograph of a transverse section through the stem of a mountain andromeda (Pieris floribunda) plant. This is a drought plant (xerophyte)

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"Cambium: The Lifeblood of Trees and Plants" The intricate world of cambium, the hidden hero within trees and plants, is unveiled through fascinating glimpses captured by scientific tools. In a silver birch twig observed under a scanning electron microscope (SEM), the delicate cambium layer reveals its vital role in growth and development. Similarly, a light micrograph of a pine tree stem showcases the intricate network of cambial cells responsible for producing new wood. Nature's harmony unfolds as we delve deeper into the wonders of cambium. Bletia purpurea, an enchanting orchid species, thrives thanks to its symbiotic relationship with this remarkable tissue. Meanwhile, in Washington's Olympic National Park, evidence left behind by black bears tells an intriguing tale - these majestic creatures strip bark to feast on the thin yet nutrient-rich cambium layer. Back under the microscope lens, young pine tree stems exhibit vibrant patterns formed by actively dividing cambial cells. Lime tree stems also reveal their secrets through captivating light micrographs that showcase their own unique arrangement of this essential growth tissue. Expanding our exploration further reveals more astonishing examples: sage stems boasting intricately woven layers of cambial activity; pine stems displaying mesmerizing rings indicative of annual growth; and even pine roots demonstrating how this versatile tissue extends below ground level. In another twist showcasing nature's diversity, sunflower stems present themselves as living canvases painted with vibrant hues when examined closely under a light microscope. Each image captures the essence of life pulsating within these slender structures – all thanks to the tireless work carried out by resilient strands of cambium. Cambium truly serves as nature’s conductor orchestrating symphonies of growth and vitality throughout countless plant species worldwide. These snapshots offer us mere mortals a glimpse into its extraordinary power – reminding us that beneath every leafy canopy or towering trunk lies an intricate web where magic happens unseen but profoundly felt.