The following classic articles on dwarf bearded irises are provided here in pdf format:
Walter Welch, 1967
Bee Warburton, 1957
Ben Hager, 1983
Elsie Zuercher, 1963
Walter Welch (DIS Beginners' Manual, c. 1965)
Iris chamaeiris [Iris lutescens]
Iris mellita [Iris suaveolens]
Video Presentations on Youtube:
The Smaller Bearded Irises and Their Companion Plants presentation by Kelly Norris to NARGS Piedmont Chapter, 2014
Dwarf Bearded Irises: The Three Types of MDBs narrated powerpoint presentation by Tom Waters, 2020
AIS webinar #19 another presentation of the above (recording of a live presentaiton, with some Q&A)
The AIS blog features the following articles on dwarf bearded irises:
The Earliest Irises: Welcoming Spring
What is a Dwarf Bearded Iris? (...and why are dwarf lovers so persistent?),
Hybridizing with Iris reichenbachii
Ben Hager's Master Plan to Save the MDB Class
Miniature Dwarf Bearded Irises: A Starter Kit
Understanding the Historic Dwarf Bearded (DB) Class
Using Species in MDB Breeding, Part 1: Iris lutescens
Using Species in MDB Breeding, Part 2: Iris aphylla X Iris pumila
Using Species in MDB Breeding, Part 3: Iris reichenbachii X Iris pumila
To explore the many MDB cultivars that have been introduced over the years, visit the MDB page at the AIS Iris Encyclopedia.
Photo Credit: El Hutchison, 'Bee Wings' (Brown, 1960)