Notes 



1. Nomenclature at the family level follows Flora of North America for fern allies and 



gymnosperms and APG II (2003) for flowering plants (or see Zomlefer 93; Judd07; 

 Sprichcr02; Simpson06). Three-letter family acronyms are indicated to the right of each 

 family (Weber82; SnowOO; Brasher04; Snow09). Varieties typically are used in lieu of 

 subspecies if the nomenclatural combination is available for variety. Quadrinomials are 

 omitted (for rationale see Snow97), as are forms (formae). Some genera have some species 

 with either subspecies or varieties (e.g., Poa); the allowance of such a mixture rather than to 

 adhere strictly to one or the other (e.g., DornOl) was to minimize the amount of rank changes 

 from the previous checklist. 



2. Names of accepted taxa appear on the far left-hand margin. Synonyms of accepted taxa are 



placed in square brackets [ ] and indented below each accepted taxon. The attribution of 



names and synonyms is based on their use in one or more of the standard floras or checklists. 



Six important points must be stressed regarding accepted taxa and their synonyms: 



i) The name indicated for a taxon may not be the correct application of the name (i.e., the 

 name being used may not match the type specimen for that name). 



ii) A name may correctly match the type specimen but may not be correctly applied to taxa in 

 our region. For example, Carexfoena var.foena was misapplied to material in our region 

 that is now properly attributed to Carex siccata. 



iii) An indication of a name being an accepted taxon by a particular source (e.g. KTZ) does 

 not necessarily mean that same source credits that taxon to our area. 



iv) Taxonomic circumscriptions of many families and genera have changed based on 

 molecular studies of the past two decades. Oddly enough, our theoretical basis for 

 understanding and interpreting molecular data (e.g., DNA sequencing) is more fully 

 developed than our ability to interpret the overall reliability of morphological or 

 anatomical data. Although some earlier molecular studies were premature in proposing 

 new classifications based on only one gene or limited sampling within a taxon, that 

 tendency is mostly a thing of the past, and the changes herein typically are well supported 

 by more than one source of data. 



v) The manner in which this checklist treats the accompanying bracketed synonyms differs 

 from Hartman& Nelson (2001), even though the visual format is the same. InHartman 

 & Nelson (2001) the abbreviations next to a bracketed synonym indicated the accepted 

 names recognized by the various publications. In this document, a literature citation with 

 a synonym can mean the same thing as Hartman & Nelson (2001). However, it also may 

 indicate that the literature source (e.g. FNA, UT3), like this document, recognizes the 

 name only as a synonym, not as an accepted taxon. The expanded usage herein more 

 fully indicates known synonymy irrespective of whether the names have ever been 

 applied to taxa in our region, or whether one of the local sources (FNA, UT3) recognized 

 it as the correct name for an accepted taxon. This is important because different Floras 

 split taxa at the specific and infraspecific levels in different ways. It has not been 

 possible to exhaustively list all attributions of all sources. The following two examples 

 should help clarify how synonymy is to be intepreted: 



Example 1 : 



i.N. Jiiiuiiin iUO'l ( lucklisi of Viisiruliij I 'I mils ill' I 111 1 Southern Kucki \ 



