Species Iris Group of North America

What's An Iris? What's SIGNA? Seed Exchange
Publications* Species Database Spec-X IOTM
Upload Info
Upload Photo
Iris dichotoma

Botanical Name: Iris dichotoma (added by D. Kramb, 01-NOV-03)

Botanical Synonyms:

Pardanthopsis dichotoma (D. Kramb, 17-SEP-04)



Common Names:

Vesper iris (C. Hensler, 13-NOV-03 )

Chromosome Count:

2n=32 (Christy Hensler, 22-MAY-09)

General Description:

Multiple small blooms on well branched stems appear in late summer. (C. Hensler, 13-NOV-03 )

Distinguishing Features:

Nocturnal. Spent blooms twist into a corkscrew shape (C. Hensler, 13-NOV-03 )

Preferred Habitat:

Well drained average soil with average moisture in full sun. (C. Hensler, 13-NOV-03 )


At least 3-6 (C. Hensler, 13-NOV-03 )

Native Range:


Status in the Wild:


Commercial Availability:

Specialty (C. Hensler, 13-NOV-03 )

Sources Cited:

SIGNA seed exchange, The Rock Garden (C. Hensler, 13-NOV-03 )

Additional Comments:


Where to buy it:

Lazy S's Farm Nursery

© 1999-2020, SIGNA. Material from this database may be freely used for non-profit purposes, provided that you give proper credit to the original photographer or contributor. For-profit organizations should contact the photographer or contributor directly to request permission. SIGNA may or may not have contact information for those individuals. Number of Species: 433, Number of Photos: 2121

© 2024, SIGNA. For general inquiries about SIGNA please contact Rodney Barton. Please report technical problems to dkramb@gmail.com.
* Some important new updates were added January 2024 indicated by the asterisk in the header. Please check them out!