Orobanche

1. Plant with an above-ground stem ca. 3–12 (–15) cm tall, bearing a cluster of long pedicels at the summit; bracts at base of pedicels glandular-pubescent (like the pedicels and calyx).

O. fasciculata

1. Plant with no stem developed above ground, the long pedicels arising from a short perennial base; bracts at the base glabrous.

O. uniflora

All species found in Orobanche

Orobanche fasciculataCLUSTERED BROOM RAPE 
Orobanche unifloraCANCER ROOT 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 19, 2017. http://michiganflora.net/genus.aspx?id=Orobanche.