SM Energy (SM) 10-K 2003 FY Annual report

                                                                    EXHIBIT 21.1


                                  SUBSIDIARIES
                                       OF
                     ST. MARY LAND & EXPLORATION COMPANY


A.       Wholly-owned subsidiaries of St. Mary Land & Exploration Company, a
         Delaware corporation:

         1.       Parish Corporation, a Colorado corporation
         2.       Nance Petroleum Corporation, a Montana corporation
         3.       St. Mary Energy Company, a Delaware corporation
         4.       Roswell LLC, a Texas limited liability company
         5.       Four Winds Marketing LLC, a Colorado limited liability company

B.       Other subsidiaries of St. Mary Land & Exploration Company

         1.       Box Church Gas Gathering LLC, a Colorado limited liability
                  company (58.6754%)
         2.       Centennial Oil & Gas LLC, a Texas limited liability
                  company (50%)
         3.       Trinity River Services LLC, a Texas limited liability company
                  (25%)

C.       Wholly-owned subsidiaries of Nance Petroleum Corporation

         1.       NPC Inc., a Colorado corporation

D.       Wholly-owned subsidiaries of Parish Corporation:

         1.       Lucy Corporation, a Colorado corporation

E.       Partnership interests held by Parish Corporation:

         1.       Hilltop Investments, a Colorado general partnership (50%)
         2.       C-470 Venture, a Colorado general partnership (68.858%)
         3.       Parish Ventures, a Colorado general partnership (100%)

F.       Subsidiaries of Lucy Corporation:

         1.       St. Mary East Texas LP, a Texas limited partnership (99%) (the
                  remaining 1% interest is held by St. Mary Land &
                  Exploration Company)