Introductory
SPECIES: Salix planifolia ssp. planifolia | Planeleaf Willow 



ABBREVIATION : 
SALPLAP

SYNONYMS : 
   Salix planifolia var. planifolia Pursh
   Salix phylicifolia ssp. planifolia (Pursh) Hiitonen
   Salix phylicifolia var. pennata (Ball) Cronq.


SCS PLANT CODE : 
   SAPL2


COMMON NAMES : 
   planeleaf willow


TAXONOMY : 
The currently accepted scientific name of planeleaf willow is Salix
planifolia Pursh ssp. planifolia [3,11].  

The species S. planifolia Pursh has been variously interpreted by
taxonomists.  Hitchcock and Cronquist [23] and Hulten [24] considered it
a North American form of a circumboreal species:  S. phylicifolia L.
ssp. planifolia (Pursh) Hiitonen.  However, recent studies have shown
that chromosome counts from North American plants differ from European
plants.  Thus, Argus [3] and Dorn [11] consider North American and
Eurasian plants to be distinct species:

  S. phylicifolia = European and Asian plants
  S. planifolia = North American plants

Two subspecies of S. planifolia Pursh, separated primarily
geographically, are recognized [3,11]:

  ssp. planifolia - planeleaf willow (primarily south of northern
                                     British Columbia)
  ssp. pulchra (Cham.) Argus - diamondleaf willow (Alaska and adjacent
                                                  Yukon Territory) 

This report's discussion is restricted to the southern subspecies,
planeleaf willow.  Two varieties of planeleaf willow are recognized
[7,49]:

          var. planifolia
          var. monica (Bebb) Jesp.


LIFE FORM : 
Shrub

FEDERAL LEGAL STATUS : 
No special status

OTHER STATUS : 
NO-ENTRY


COMPILED BY AND DATE : 
Ronald Uchytil, August 1991


LAST REVISED BY AND DATE : 
NO-ENTRY


AUTHORSHIP AND CITATION : 
Uchytil, Ronald J.  1991.  Salix planifolia ssp. planifolia.  In: Remainder of Citation

Related categories for Species: Salix planifolia ssp. planifolia | Planeleaf Willow