HORT 202
GENERAL HORTICULTURE LABORATORY
Lab 2: Recognition of Plant Structures
INTRODUCTION

ROOTS

LEAF   MORPHOLOGY LEAF TYPES  MODIFIED LEAVES
 

STEM MORPHOLOGY 
 

MODIFIED STEMS
 

TYPICAL FLOWERS
 

FRUIT PARTS

CLASSIFICATION OF FRUIT

 
LEAF
     MORPHOLOGY

Simple Leaf

simple-leaf tip- the terminal point of the leaf.
blade-the flattened, green, expanded portion of a leaf.
margin- edge of a leaf.
midrib-the most prominent central vein in a leaf.
lateral veins-secondary veins in a leaf.
petiole-the leaf stalk (connects blade to stem).
stipules-leaf-like appendages (at the base of petiole of some leaves).

 
Simple Leaf  Fiddle Leaf Figsimple leaf--fiddle leaf fig

 

Compound Leaf

compound-leaf leaflet- secondary leaf of a compound leaf. 
rachis- an extension of the petiole bearing leaflets.
petiolule-the leaflet stalk.
petiole-the leaf stalk
lateral veins-secondary veins in a leaf.
stipules-leaf-like appendages (at the base of petiole of some leaves).

 
Compound Leaf  Rosecompound leaf--Rose

 

Leaf Arrangement

opposite-leafalternate-leafwhorled-leaf

opposite two leaves (a pair) per node, usually opposite each other.
Big Periwinkleopposite-leaf Big Periwinkle
alternate one leaf per node, usually opposite each other. 
Elaeagnus
alternate leaf Elaeagnus
whorled three or more leaves per node, usually opposite each other.
Oleanderwhorled-leaf-oleander

 

Return to | Hort 201 Lecture Home Page |202 Lab Home Page
The General Horticulture Laboratory 2 Homepage, was created by Trisha Blessington Haley and was updated by Michelle Meche.  Any comments or suggestions should be e-mailed to D.W. Reed at e-mail: dwreed@tamu.edu.  If you use any of the instructional material, please give credit to the source. Copyright  D.W. Reed, TAMU.