Rare Plants Annual Report Humboldt Redwood Company LLC. December 1, 2014 Humboldt Redwood Company, LLC Rare Plants Annual Report 2014 TABLE OF CONTENTS EXECUTIVE SUMMARY ......................................................................................................................................... 1 INTRODUCTION ....................................................................................................................................................... 3 Special Status Plants ................................................................................................................................. 3 Table 1. HRC’s Special Status Plant List for the 2014 field season. ........................................... 4 Watch List Plants ...................................................................................................................................... 5 Table 2. HRC’s Watch List Plants for the 2014 field season. ..................................................... 5 Setting ....................................................................................................................................................... 6 METHODS ................................................................................................................................................................... 6 Survey Methods ........................................................................................................................................ 6 Mitigation Methods .................................................................................................................................. 7 Effectiveness Monitoring Methods........................................................................................................... 8 Research Methods..................................................................................................................................... 8 Data Management and Analysis Methods ................................................................................................ 8 Definition of Occurrence ........................................................................................................................ 10 RESULTS ................................................................................................................................................................... 11 Survey Results ........................................................................................................................................ 11 Table 3. 2014 Assessed/surveyed acres by month. .................................................................... 11 Table 4. Summary of 2014 Special Status Plant detections and property-wide totals. ............. 12 Effectiveness Monitoring Results ........................................................................................................... 12 PROPERTY-WIDE CONSULTATIONS ............................................................................................................... 13 CHANGES TO HRC’S SPECIAL STATUS PLANT AND WATCH LISTS ...................................................... 13 ASTRAGALUS AGNICIDUS .................................................................................................................................. 14 Introduction and Summary ..................................................................................................................... 14 Methods .................................................................................................................................................. 15 Survey Methods.................................................................................................................................. 15 Mitigation Methods ............................................................................................................................ 15 Results .................................................................................................................................................... 15 Survey and Mitigation Results ........................................................................................................... 15 Effectiveness Monitoring Results ...................................................................................................... 15 Table 5. 2014 Astragalus agnicidus site revisits. ...................................................................... 16 Discussion ............................................................................................................................................... 16 CAREX ARCTA (NORTHERN CLUSTERED SEDGE) ....................................................................................... 19 Introduction and Summary ..................................................................................................................... 19 Methods .................................................................................................................................................. 19 Survey Methods.................................................................................................................................. 19 Mitigation Methods ............................................................................................................................ 20 Results .................................................................................................................................................... 20 Survey and Mitigation Results ........................................................................................................... 20 Effectiveness Monitoring Results ...................................................................................................... 20 Discussion ............................................................................................................................................... 20 ERYTHRONIUM REVOLUTUM (COAST FAWN LILY) .................................................................................... 21 Introduction and Summary ..................................................................................................................... 21 i Humboldt Redwood Company, LLC Rare Plants Annual Report 2014 Methods .................................................................................................................................................. 22 Survey Methods.................................................................................................................................. 22 Mitigation Methods ............................................................................................................................ 22 Research Methods: Erythronium revolutum Response to Herbicide Application ............................ 22 Results .................................................................................................................................................... 23 Survey and Mitigation Results ........................................................................................................... 23 Effectiveness Monitoring Results ...................................................................................................... 23 Research Results: Erythronium revolutum Response to Herbicide Application ................................ 23 Discussion ............................................................................................................................................... 23 GILIA CAPITATA SSP. PACIFICA (PACIFIC GILIA) ....................................................................................... 24 Introduction and Summary ..................................................................................................................... 24 Methods .................................................................................................................................................. 24 Survey methods .................................................................................................................................. 24 Mitigation methods ............................................................................................................................ 24 Results .................................................................................................................................................... 25 Survey and Mitigation Results ........................................................................................................... 25 Table 6. 2014 Gilia capitata ssp. pacifica locations, numbers, and mitigations. ...................... 25 Effectiveness Monitoring Results ...................................................................................................... 25 Discussion ............................................................................................................................................... 25 MONTIA HOWELLII (HOWELL’S MONTIA) ................................................................................................... 26 Introduction and Summary ..................................................................................................................... 26 Methods .................................................................................................................................................. 27 Mitigation methods ...........................................................................................................................