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BOTONY, PLANT PHYSIOLOGY AND PLANT GROWTHLESSON 4 - PLANT PARTS AND FUNCTIONS

PART 2 - LEAVES

Plant Parts and Functions, Part Two – Leaves

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▪ Segment One - Leaf Parts and Their Functions

▪ Segment Two – Leaf Characteristics

▪ Segment Three – Leaf and Flower Buds

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Segment One - Leaf Parts and Their Functions

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Broadleaf and Conifer Leaves

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Leaf Cross-Section

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Leaves as Food

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Modifications of Leaves

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Photo courtesy of Pat Breen, Oregon State UniversityTendril Bracts

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Segment Two – Leaf Characteristics

▪Shape of leaf blade

▪Leaf arrangement

▪Pattern of veins

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Types of Venation

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parallel pinnate palmate

net-veined or reticulate-veined

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Leaf Shape

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simple

compound

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Leaf Arrangement Along Stem

oppositealternate

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▪Do animals grow all their lives?

▪Do plants grow all their lives?

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Segment Three – Leaf and Flower Buds

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Buds as Food

Savoy cabbage

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ReviewPlant Parts and Functions, Part Two – Leaves

• Segment One - Leaf Parts and Their Functions

• Segment Two – Leaf Characteristics

• Segment Three – Leaf and Flower Buds

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16

Review

leaf blade

midrib

petiole

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Review

Shape of leaf blade

Leaf arrangement

Pattern of veins

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Reviewterminal bud

axillary bud

adventitious bud (not

shown)

Clip Art

Dover Publications, Inc.

Mineola, New York

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Thank you for using the Pathways through Horticulture Curriculum, provided to Minnesota teachers free-of-charge, courtesy of the Minnesota Nursery & Landscape Association and the MNLA Foundation.

For more information or to inquire about other resources offered by the MNLA Foundation, please contact:

MNLA FoundationOffice: 651-633-4987

Email: MNLA@MNLA.biz

www.MNLAschoolhouse.orgConnect with horticulture and landscaping resources.

www.theLandLovers.orgYour resource for careers in the green industry.

These lessons were obtained through a purchase agreement between the Minnesota Nursery and Landscape

Association (MNLA) and the Pennsylvania Landscape and Nursery Association (PLNA) and have been modified by

the MNLA. The Pennsylvania Landscape and Nursery Association retains all original ownership rights and all

copyrights. © 2005, Pennsylvania Landscape and Nursery Association. All Rights Reserved.