Available - not endangered
TB M S3M
From Puget Sound catalog 1929: “S. heliotrope; F. darker; prominent orange beard. Vigorous very large flowers; a general pastel effect. Appropriately named ‘Storm Cloud’.”
From the Lee R. Bonnewitz Irises catalog for 1926: “S. slate blue with bronze shading; F. bronze and purple; very large flowers.”
Provenance: Image 3 from Presby Iris Gardens, Montclair NJ, c. 2003.