1. Flowers erect; tepals distinctly narrowed at the base to a slender claw; leaves up to 8 (–14) mm wide.

L. philadelphicum

1. Flowers nodding (fruit becoming erect); tepals narrowed gradually toward base, not clawed; widest leaves 8–35 mm wide.

2. Flowers pink or purple.

L. martagon

2. Flowers orange.

3. Tepals glabrous within; stem glabrous above; leaves mostly whorled.

L. michiganense

3. Tepals with pubescent strip basally within; stems with cobwebby pubescence, especially above; leaves alternate but crowded.

L. lancifolium

All species found in Lilium

Lilium lancifoliumTIGER LILY 
Lilium martagonMARTAGON LILY 
Lilium michiganenseMICHIGAN LILY 
Lilium philadelphicumWOOD LILY 


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 18, 2018.