Leaf Characteristics What you need to know to identify

Wildland Identification REM 252 Leaf & Stem Arrangement

 Basal  Alternate  Opposite  Whorled  Fascicled

basal Alternate Opposite Whorled Leaf & Stem Arrangement

 Basal Basal  Opposite Arrangement: Agoseris glauca  Alternate  Whorled  Fascicled

Fascicled: Pinus edulis Leaf Arrangements

Alternate Opposite Whorled Leaf Arrangement

Opposite

Alternate

Whorled Leaf Attachment

 Clasping  Sessile  Petiolate  Sheathing Petiolate

Sheathing Clasping

Sessile Leaf Type: Simple or Compound Leaf Types

 Simple

 Compound

Palmately Compound Pinnately Compound Compound Leaves

Palmate

Pinnate Simple Leaves

uptreeid.com

gobotany.com uptreeid.com Leaf Shapes

Linear Elliptic Lanceolate Oblanceolate

Ovate Obovate Palmate Wedge-shaped Arrow-shaped Leaf Shapes

Elliptic Lanceolate Oblanceolate Arctostaphylos pungens Linear Senecio serra Hymenoxys hoopesii Salix exigua

Obovate Ovate Arctostaphylos Palmate Wedge-shaped Arrow-shaped Populus tremuloides Uva-ursi Acer glabrum Artemisia tridentata sagittata Leaf Shapes Fig. 11 Leaf Veinations

Parallel Pinnate Palmate Netted Palmate Venation

Pinnate Venation

Parallel Venation Netted Venation Leaf Margins

Pinnately Lobed Palmately Lobed

Entire Serrated Scalloped Toothed Leaf Margins

Pinnately Lobed Palmately Lobed Rubus parviflorus

Entire Serrated Scalloped Toothed Symphoricarpos albus Symphoricarpos occidentalis Amelanchier alnifolia Prunus virginiana More Leaf Margins

www.infovisual.info/01/011_en.html

If a leaf margin is very ragged and like it has been cut and sliced… then the margin would be called incised or divided. It could be palmately divided, pinnately divided or highly divided: More Leaf Margins If a leaf margin is very ragged and like it has been cut and sliced… then the margin would be called incised or divided.

It could be palmately divided, pinnately divided or simply “highly divided” Examples of Incised or Divided Leaf Margins

lucidcentral.org

greergardens.com Palmately Divided Maple (Acer sp.)

pnwherbaria.org Incised Highly Divided Common dandelion .0catch.com Queen Anne’s lace (Daucus carota) (Taraxacum officinale) Pinnately Divided Black mustard (Brassica nigra) Leaf Margins Fig. 13 in Brown Book Websites

 http://www.pnwherbaria.org/  http://plants.usda.gov/java/  http://biology.burke.washington.edu/herbariu m/imagecollection.php  http://idahograssbook.wix.com/close-up