Iberis

1. Plants fibrous-rooted perennial subshrubs; leaves leathery, entire, ± evergreen; flowering May and June.

I. sempervirens

1. Plants tap-rooted annuals; leaves herbaceous, toothed or entire, not evergreen; flowering July–September.

2. Fruit ca. 3–5 mm long; flowers usually white, fragrant; leaves ± irregularly toothed; inflorescence elongating in fruit.

I. amara

2. Fruit ca. 5.5–6.5 (–10) mm long; flowers usually pink, red, or purple, not fragrant; leaves entire; inflorescence remaining densely compact in fruit.

I. umbellata

All species found in Iberis

Iberis amaraROCKET CANDYTUFT 
Iberis sempervirensEVERGREEN CANDYTUFT 
Iberis umbellataGLOBE CANDYTUFT 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 23, 2017. http://michiganflora.net/genus.aspx?id=Iberis.