| ACAD
Acadia University |
| ALA
University of Alaska Museum
|
| ALTA University
of Alberta |
| ARIZ University
of Arizona |
| ASU Arizona
State University
|
| BH Cornell
University |
| BHO Ohio
University |
| BING St.
Univ. of NY, Binghamton
|
| BKL Brooklyn
Botanic Garden |
| BOON Appalachian
State University
|
| BRIT Bot. Research Inst. of Texas
|
| BRY Brigham
Young University
|
| BUF Buffalo
Museum of Science
|
| C University
of Copenhagen |
| CANM Canad.
Mus. of Nat., Ottawa |
| CAS California
Academy of Science
|
| CHRB Rutgers
University |
| CINC University
of Cincinnati |
| CLEMS Clemson
University |
| COLO University
of Colorado |
| CONN University
of Connecticut |
| CS Colorado
State University
|
| DUKE Duke
University |
| EIU Eastern
Illinois University
|
| F Field
Museum of Natural History
|
| FH Harvard
University |
| FLAS University
of Florida |
| FLD Fort
Lewis College
|
| GA University
of Georgia |
| GFC Great
Falls College |
| GFND University
of North Dakota |
| ILL
University of Illinois
|
| ILLS Illinois
Natural History Survey |
| IND Indiana
University |
| ISC Iowa
State University
|
| KE Kent
State University
|
| KIRI University
of Rhode Island |
| KSC Kansas
State University
|
| KSP
Theodore M. Sperry Herbarium |
| KY University
of Kentucky |
| LEA University
of Lethbridge
|
| MAINE University
of Maine |
| MARY University
of Maryland |
| MCTC Michigan
Tech. University
|
| MICH University
of Michigan |
| MIL Milwaukee
Public Museum
|
| MIN University
of Minnesota |
| MNA Museum
of Northern Arizona |
| MO Missouri
Botanical Garden |
| MONT Montana
State University
|
| MSC Michigan
State College |
| MT University
of Montreal |
| MU Miami
University |
| NBM New
Brunswick Museum |
| NCU Univ.
of N. Carolina, Chapel Hill
|
| NDA North
Dakota State University
|
| NEB University
of Nebraska |
| NFLD Mem. Univ. of Newfoundland
|
| NMC New
Mexico State University
|
| NO Tulane
University |
| NY New
York Botanical Garden |
| NYS New
York State Museum |
| ODU Old
Dominion University
|
| OKL University
of Oklahoma |
| OS Ohio
State University
|
| OSC Oregon
State University
|
| PH Philadelphia
Acad. of Natural Sci.
|
| RENO University
of Nevada |
| RM University
of Wyoming |
| SASK University
of Saskatchewan |
| SFSU San
Francisco State University
|
| SIU Southern
Illinois University
|
| SRSC Sul Ross State
University |
| TAMU Texas
A & M University
|
| TENN University
of Tennessee |
| TEX University
of Texas |
| TRTC University
of Toronto |
| TTC Texas
Tech University
|
| UBC University
of British Columbia |
| UC University
of California, Berkeley
|
| UCSC Univ.
of California, Santa Cruz
|
| UNAF University
of North Alabama |
| US Smithsonian
Institution |
| USCH University
of South Carolina |
| USF University
of South Florida |
| UT University
of Utah |
| UWEC Univ.
of Wisconsin, Eau Claire |
| UWO Univ.
of W. Ontario, London
|
| UWSP Univ.
of Wisc., Stevens
Point |
| V Royal
British Columbia Museum
|
| VPI Virginia
Polytechnic Institute |
| VT University
of Vermont |
| WIS University
of Wisconsin |
| WS Washington
State University
|
| WTU University
of Washington |
|
YU Yale
University
|
