The Collaborative International Dictionary of English v.0.48:

Salix \Sa"lix\, n.; pl. Salices. [L., the willow.] (Bot.)
   (a) A genus of trees or shrubs including the willow, osier,
       and the like, growing usually in wet grounds.
   (b) A tree or shrub of any kind of willow.
       [1913 Webster]

WordNet (r) 3.0 (2006):

Salix
    n 1: a large and widespread genus varying in size from small
         shrubs to large trees: willows [syn: Salix, genus
         Salix]

U.S. Gazetteer Places (2000):

Salix-Beauty Line Park, PA -- U.S. Census Designated Place in Pennsylvania
   Population (2000):    1259
   Housing Units (2000): 483
   Land area (2000):     0.969710 sq. miles (2.511537 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.969710 sq. miles (2.511537 sq. km)
   FIPS code:            67611
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             40.298358 N, 78.761987 W
   ZIP Codes (1990):     15952
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Salix-Beauty Line Park, PA
    Salix-Beauty Line Park
    Salix, PA
    Salix


U.S. Gazetteer Places (2000):

Salix, IA -- U.S. city in Iowa
   Population (2000):    370
   Housing Units (2000): 160
   Land area (2000):     0.667390 sq. miles (1.728531 sq. km)
   Water area (2000):    0.013061 sq. miles (0.033828 sq. km)
   Total area (2000):    0.680451 sq. miles (1.762359 sq. km)
   FIPS code:            70320
   Located within:       Iowa (IA), FIPS 19
   Location:             42.307898 N, 96.287111 W
   ZIP Codes (1990):     51052
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Salix, IA
    Salix