EXHIBIT 21.1 SUBSIDIARIES OF THE COMPANY State or Jurisdiction of Organization Subsidiaries - --------------------- ----------- Delaware Bridge Oil (U.S.A.) Inc. Delaware DMLP Co. Delaware Doram Energy, Inc. Delaware Dorchester Exploration, Inc. Texas Dorchester Gas Systems, Inc. Texas Dorchester Intrastate Gas Systems, L.P. Texas Dorchester Master Limited Partnership Delaware LTP Investments, Inc. Delaware P&PCanada LP Co. Delaware P&PCanada GP Co. Delaware P&P Holdings, Inc. Delaware P&P, Inc. Delaware ParCal Inc. Delaware Parker & Parsley Argentina, Inc. Turks and Caicos Islands Parker & Parsley Capital LLC Texas Parker & Parsley Development L.P. Delaware Parker & Parsley Energy Trading Company Delaware Parker & Parsley Gas Processing Co. Delaware Parker & Parsley, Inc. Delaware Parker & Parsley International Petroleum Company Australia Parker & Parsley Petroleum Australia Holdings Pty Limited Australia Parker & Parsley Petroleum Australia Pty Limited Delaware Parker & Parsley Petroleum USA, Inc. Delaware Parker & Parsley Producing L.P. Texas Parker & Parsley Properties L.P. Texas Parker & Parsley Scholarship Foundation New York Parker & Parsley Transfer Agent Corporation Texas Parsley Petroleum Company Delaware Rosamond Drilling Company, Inc. Pennsylvania Three Rivers Pipeline Business Trust Partnerships of which one or more direct or indirect subsidiaries of the Company is a general partner Texas Parker & Parsley 81-I, Ltd. Texas Parker & Parsley 81-II, Ltd. Texas Parker & Parsley 82-I, Ltd. Texas Parker & Parsley 82-II, Ltd. Texas Parker & Parsley 82-III, Ltd. Texas Parker & Parsley 83-A, Ltd. Texas Parker & Parsley 83-B, Ltd. Texas Parker & Parsley 84-A, Ltd. Texas Parker & Parsley 85-A, Ltd. Texas Parker & Parsley 85-B, Ltd. Texas Parker & Parsley Private Investment 85-A Ltd. Texas Parker & Parsley Selected 85 Private Investment, Ltd. Texas Parker & Parsley 86-A, Ltd. 3 State or Jurisdiction of Organization Subsidiaries - --------------------- ------------ Texas Parker & Parsley 86-B, Ltd. Texas Parker & Parsley 86-C, Ltd. Texas Parker & Parsley Private Investment 86, Ltd. Delaware Parker & Parsley 87-A, Ltd. Delaware Parker & Parsley 87-B, Ltd. Delaware Parker & Parsley 87-A Conv., Ltd. Delaware Parker & Parsley 87-B Conv., Ltd. Delaware Parker & Parsley Private Investment 87, Ltd. Delaware Parker & Parsley Producing Properties 87-A, Ltd. Delaware Parker & Parsley Producing Properties 87-B, Ltd. Delaware Parker & Parsley 88-A, L.P. Delaware Parker & Parsley 88-B, L.P. Delaware Parker & Parsley 88-C, L.P. Delaware Parker & Parsley 88-A Conv., L.P. Delaware Parker & Parsley 88-B Conv., L.P. Delaware Parker & Parsley 88-C Conv., L.P. Delaware Parker & Parsley Private Investment 88, L.P. Delaware Parker & Parsley Producing Properties 88-A, L.P. Delaware Parker & Parsley 89-A, L.P. Delaware Parker & Parsley 89-B, L.P. Texas Parker & Parsley 89-A Conv., L.P. Texas Parker & Parsley 89-B Conv., L.P. Texas P&P Employees 89-A Conv., L.P. Texas P&P Employees 89-B Conv., L.P. Delaware Parker & Parsley Private Investment 89, L.P. Texas P&P Employees Private Investment 89, L.P. Delaware Parker & Parsley 90-A Conv., L.P. Delaware Parker & Parsley 90-B Conv., L.P. Delaware Parker & Parsley 90-C Conv., L.P. Delaware Parker & Parsley 90-A, L.P. Delaware Parker & Parsley 90-B, L.P. Delaware Parker & Parsley 90-C, L.P. Texas P&P Employees 90-A Conv., L.P. Texas P&P Employees 90-B Conv., L.P. Texas P&P Employees 90-C Conv., L.P. Delaware Parker & Parsley Private Investment 90 Conv., L.P. Texas P&P Employees Private Investment 90 Conv., L.P. Delaware Parker & Parsley 90 Spraberry Private Development Conv., L.P. Texas P&P Employees 90 Spraberry Private Development L.P. Delaware Parker & Parsley 91-A, L.P. Delaware Parker & Parsley 91-B, L.P. Delaware Parker & Parsley 91-A Conv., L.P. Delaware Parker & Parsley 91-B Conv., L.P. Texas P&P Employees 91-A G.P. Texas P&P Employees 91-B G.P. Texas Parker & Parsley 1992 Direct Investment Program, Ltd. Texas Parker & Parsley 1993 Direct Investment Program, Ltd. Texas Parker & Parsley 1994 Direct Investment Program, Ltd. Texas Midkiff Development Drilling Program, Ltd. 4