Elderberry Rust

(Puccinia bolleyana)

Conservation Status
Elderberry Rust
  IUCN Red List

not listed


not listed


not listed


Elderberry Rust is a fungus that affects American elderberry and at least twelve species of sedge. It occurs in eastern United States east of the Great Plains and in Ontario. There are only six recorded sightings of this rust in Minnesota. All of them are dated prior to 1940 and are in Cook, Goodhue, and Houston Counties. However, rusts on plants are often overlooked and seldom reported. The scarcity of records for Elderberry Rust may not reflect its actual abundance.

Elderberry Rust first appears in early spring as small, bright orange pustules on the leaflets and petioles of American elderberry. In May it develops large bright orange pustules that causes deformation of the plant’s leaves, petioles, and stems. In the summer, spores are wind-blown to the alternate hosts, twelve species of sedges: Frank's sedge (C. frankii), Bebb's sedge (C. bebbii), button sedge (C. bullata), longhair or bottlebrush sedge (C. comosa), fringed sedge (C. crinita), raven or crow-foot sedge (C. crus-corvi), greater bladder sedge (C. intumescens), false hop sedge (C. lupuliformis), hop sedge (C. lupulina), shallow or lurid sedge (C. lurida), blunt broom sedge (C. tribuloides), and hairy fruited sedge (C. trichocarpa). Infection on the sedge plant appears as necrotic lesions on the leaves.


Similar Species

Habitat and Hosts

American elderberry and sedges




Early spring to fall


Distribution Map



4, 7, 26, 29, 30, 77.





  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Phylum Basidiomycota (club fungi)  
  Subphylum Pucciniomycotina  
  Class Pucciniomycetes  
  Order Pucciniales (rust fungi)  
  Suborder Uredinineae  
  Family Pucciniaceae  
  Genus Puccinia (orange-yellow rusts)  

Elderberry Rust was published as Aecidium sambuci in 1822, as Puccinia bolleyana in 1891, and as Puccinia sambuci in 1903. The latter two names are both widely in use.




Aecidium sambuci

Dicaeoma bolleyanum

Puccinia atkinsoniana var. bolleyana

Puccinia sambuci


Common Names

  Elderberry Rust  







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    Elderberry Rust   Elderberry Rust  
    Elderberry Rust      






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Other Videos
  Puccinia Life Cycle
Pests, Weeds & Problems

May 19, 2018

Puccinia Life Cycle. Puccinia is a genus of fungi that cause a serious plant disease commonly called rust; the genus contains thousands of species, and the various species infect a wide range of host plants. The life cycle of the fungi is complex, typically involving five kinds of spores and two unrelated types of host plants. Because Puccinia...

Table of contents Puccinia Life Cycle
The Beginning 00:49
The Alternate Host 01:34
Reinfection without an Alternate Host 02:33
Widespread Infection 03:17
Symptoms and Control 03:55




Visitor Sightings

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Location: Gamehaven Reserve, Rochester, MN

multiple sightings there (at least 3-4)

  Amber Fiedler

Location: 31 Ave SW, Rochester MN 55902

It started last fall and is destroying my 4 bushes this summer.

MinnesotaSeasons.com Sightings




Created: 11/29/2019

Last Updated:

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