Rare Plants Annual Report 2013 December 1, 2013 Humboldt Redwood Company, LLC Rare Plants Annual Report 2013 TABLE OF CONTENTS EXECUTIVE SUMMARY ......................................................................................................................................... 1 INTRODUCTION ....................................................................................................................................................... 3 Special Status Plants ................................................................................................................................. 3 Table 1. HRC’s Special Status Plant List for the 2013 field season. .......................................... 4 Watch List Plants ...................................................................................................................................... 5 Table 2. HRC’s Watch List Plants for the 2013 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 ................................................................................................................................................................... 10 Survey Results ........................................................................................................................................ 10 Table 3. 2013 Assessed/surveyed acres by month. ................................................................... 11 Table 4. Summary of 2013 Special Status Plant detections and property-wide totals. ............ 11 Effectiveness Monitoring Results ........................................................................................................... 12 PROPERTY-WIDE CONSULTATIONS ............................................................................................................... 12 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 Discussion ............................................................................................................................................... 15 CAREX ARCTA (NORTHERN CLUSTERED SEDGE) ....................................................................................... 18 Introduction and Summary ..................................................................................................................... 18 Methods .................................................................................................................................................. 18 Survey Methods.................................................................................................................................. 18 Mitigation Methods ............................................................................................................................ 19 Results .................................................................................................................................................... 19 Survey and Mitigation Results ........................................................................................................... 19 Table 5. Carex arcta site revisits. .............................................................................................. 19 Discussion ............................................................................................................................................... 19 COPTIS LACINIATA (OREGON GOLDTHREAD)............................................................................................ 21 Introduction and Summary ..................................................................................................................... 21 Methods .................................................................................................................................................. 21 i Humboldt Redwood Company, LLC Rare Plants Annual Report 2013 Survey Methods.................................................................................................................................. 21 Mitigation Methods ............................................................................................................................ 22 Results .................................................................................................................................................... 22 Survey and Mitigation Results ........................................................................................................... 22 Table 6. 2013 Coptis laciniata locations, numbers, and mitigations. ....................................... 22 Discussion ............................................................................................................................................... 22 ERYTHRONIUM REVOLUTUM (COAST FAWN LILY) .................................................................................... 24 Introduction and Summary ..................................................................................................................... 24 Methods .................................................................................................................................................. 25 Survey Methods.................................................................................................................................. 25 Mitigation Methods ............................................................................................................................ 25 Research Methods: Erythronium revolutum Response to Herbicide Application ............................ 25 Results .................................................................................................................................................... 26 Survey and Mitigation Results ........................................................................................................... 26 Table 7. 2013 Erythronium revolutum locations, numbers, and mitigations............................ 26 Research Results: Erythronium revolutum Response to Herbicide Application ................................ 26 Discussion ............................................................................................................................................... 26 GILIA CAPITATA SSP. PACIFICA (PACIFIC GILIA) ....................................................................................... 28 Introduction and Summary ..................................................................................................................... 28 Methods .................................................................................................................................................. 28 Survey methods .................................................................................................................................. 28 Mitigation methods ............................................................................................................................ 29 Results .................................................................................................................................................... 29 Survey