Chapter 6 Covered Plant Species Contents 6 COVERED PLANT SPECIES 6-1 6.1 Introduction 6-1 6.1.1 Plant designations 6-1 6.1.2 Counties and quadrangles 6-1 6.2 Sensitivities of Rare Plants to Timber Management 6-4 6.3 Humboldt Milk-vetch (Astragalus agnicidus) 6-5 6.3.1 Conservation status 6-5 6.3.2 Distribution 6-5 6.3.2.1 General distribution 6-5 6.3.2.2 Plan area 6-5 6.3.3 Description and life history 6-6 6.3.4 Habitat requirements 6-7 6.3.5 Threats 6-7 6.3.6 Population trend 6-7 6.3.7 Mendocino lighting complex (2008) 6-7 6.4 Small Groundcone (Kopsiopsis hookeri) 6-8 6.4.1 Conservation status 6-8 6.4.2 Distribution 6-8 6.4.2.1 General distribution 6-8 6.4.2.2 Plan area 6-8 6.4.3 Description and life history 6-8 6.4.4 Habitat requirements 6-8 6.4.5 Threats 6-8 6.4.6 Population trend 6-9 6.5 Pygmy Cypress (Hesperocyparis pygmaea) 6-9 6.5.1 Conservation status 6-9 6.5.2 Distribution 6-9 6.5.2.1 General distribution 6-9 6.5.2.2 Plan area 6-9 6.5.3 Description and life history 6-9 6.5.4 Habitat requirements 6-10 6.5.5 Threats 6-10 6.5.6 Population trend 6-10 6.6 Swamp Harebell (Campanula californica) 6-10 6.6.1 Conservation status 6-10 6.6.2 Distribution 6-10 6.6.2.1 General distribution 6-10 6.6.2.2 Plan area 6-10 6.6.3 Description and life history 6-11 6.6.4 Habitat requirements 6-11 6.6.5 Threats 6-11 6.6.6 Population trend 6-11 6.7 California Sedge (Carex californica) 6-12 6.7.1 Conservation status 6-12 i 6.7.2 Distribution 6-12 6.7.2.1 General distribution 6-12 6.7.2.2 Plan area 6-12 6.7.3 Description and life history 6-12 6.7.4 Habitat requirements 6-12 6.7.5 Threats 6-12 6.7.6 Population trend 6-12 6.8 Bristly Sedge (Carex comosa) 6-13 6.8.1 Conservation status 6-13 6.8.2 Distribution 6-13 6.8.2.1 General distribution 6-13 6.8.2.2 Plan area 6-13 6.8.3 Description and life history 6-13 6.8.4 Habitat requirements 6-13 6.8.5 Threats 6-13 6.8.6 Population trend 6-13 6.9 Deceiving Sedge (Carex saliniformis) 6-14 6.9.1 Conservation status 6-14 6.9.2 Distribution 6-14 6.9.2.1 General distribution 6-14 6.9.2.2 Plan area 6-14 6.9.3 Description and life history 6-14 6.9.4 Habitat requirements 6-14 6.9.5 Threats 6-14 6.9.6 Population trend 6-14 6.10 Green Sedge (Carex viridula var. viridula) 6-15 6.10.1 Conservation status 6-15 6.10.2 Distribution 6-15 6.10.2.1 General distribution 6-15 6.10.2.2 Plan area 6-15 6.10.3 Description and life history 6-15 6.10.4 Habitat requirements 6-15 6.10.5 Threats 6-15 6.10.6 Population trend 6-15 6.11 Oregon goldthread (Coptis laciniata) 6-16 6.11.1 Conservation status 6-16 6.11.2 Distribution 6-16 6.11.2.1 General distribution 6-16 6.11.2.2 Plan area 6-16 6.11.3 Description and life history 6-17 6.11.4 Habitat requirements 6-17 6.11.5 Threats 6-17 6.11.6 Population trend 6-17 6.12 Streamside Daisy (Erigeron biolettii) 6-17 6.12.1 Conservation status 6-17 6.12.2 Distribution 6-17 6.12.2.1 General distribution 6-17 6.12.2.2 Plan area 6-18 6.12.3 Description and life history 6-18 6.12.4 Habitat requirements 6-18 ii 6.12.5 Threats 6-18 6.12.6 Population trend 6-18 6.13 Coast Fawn Lily (Erythronium revolutum) 6-18 6.13.1 Conservation status 6-18 6.13.2 Distribution 6-18 6.13.2.1 General distribution 6-18 6.13.2.2 Plan area 6-19 6.13.3 Description and life history 6-19 6.13.4 Habitat requirements 6-19 6.13.5 Threats 6-19 6.13.6 Population trend 6-19 6.14 Roderick’s Fritillary (Fritillaria roderickii) 6-19 6.14.1 Conservation status 6-19 6.14.2 Distribution 6-19 6.14.2.1 General distribution 6-19 6.14.2.2 Plan area 6-20 6.14.3 Description and life history 6-20 6.14.4 Habitat requirements 6-20 6.14.5 Threats 6-20 6.14.6 Population trend 6-20 6.15 Pacific Gilia (Gilia capitata ssp. pacifica) 6-20 6.15.1 Conservation status 6-20 6.15.2 Distribution 6-21 6.15.2.1 General distribution 6-21 6.15.2.2 Plan area 6-21 6.15.3 Description and life history 6-21 6.15.4 Habitat requirements 6-21 6.15.5 Threats 6-21 6.15.6 Population trend 6-21 6.16 Glandular Western Flax (Hesperolinon adenophyllum) 6-21 6.16.1 Conservation status 6-21 6.16.2 Distribution 6-21 6.16.2.1 General distribution 6-21 6.16.2.2 Plan area 6-22 6.16.3 Description and life history 6-22 6.16.4 Habitat requirements 6-22 6.16.5 Threats 6-22 6.16.6 Population trend 6-22 6.17 Thin-lobed Horkelia (Horkelia tenuiloba) 6-22 6.17.1 Conservation status 6-22 6.17.2 Distribution 6-22 6.17.2.1 General distribution 6-22 6.17.2.2 Plan area 6-23 6.17.3 Description and life history 6-23 6.17.4 Habitat requirements 6-23 6.17.5 Threats 6-23 6.17.6 Population trend 6-23 6.18 Hair-leaved Rush (Juncus supiniformis) 6-23 6.18.1 Conservation status 6-23 6.18.2 Distribution 6-23 iii 6.18.2.1 General distribution 6-23 6.18.2.2 Plan area 6-24 6.18.3 Description and life history 6-24 6.18.4 Habitat requirements 6-24 6.18.5 Threats 6-24 6.18.6 Population trend 6-24 6.19 Coast Lily (Lilium maritimum) 6-24 6.19.1 Conservation status 6-24 6.19.2 Distribution 6-24 6.19.2.1 General distribution 6-24 6.19.2.2 Plan area 6-25 6.19.3 Description and life history 6-25 6.19.4 Habitat requirements 6-25 6.19.5 Threats 6-25 6.19.6 Population trend 6-25 6.19.7 Mendocino lighting complex (2008) 6-25 6.20 Baker’s Meadowfoam (Limnanthes bakeri) 6-26 6.20.1 Conservation status 6-26 6.20.2 Distribution 6-26 6.20.2.1 General distribution 6-26 6.20.2.2 Plan area 6-26 6.20.3 Description and life history 6-26 6.20.4 Habitat requirements 6-26 6.20.5 Threats 6-26 6.20.6 Population trend 6-26 6.21 Running-pine (Lycopodium clavatum) 6-27 6.21.1 Conservation status 6-27 6.21.2 Distribution 6-27 6.21.2.1 General distribution 6-27 6.21.2.2 Plan area 6-27 6.21.3 Description and life history 6-27 6.21.4 Habitat requirements 6-27 6.21.5 Threats 6-27 6.21.6 Population trend 6-27 6.22 Mendocino Bush Mallow (Malacothamnus mendocinensis) 6-28 6.22.1 Conservation status 6-28 6.22.2 Distribution 6-28 6.22.2.1 General distribution 6-28 6.22.2.2 Plan area 6-28 6.22.3 Description and life history 6-28 6.22.4 Habitat requirements 6-28 6.22.5 Threats 6-28 6.22.6 Population trend 6-28 6.23 Seacoast Ragwort (Packera bolanderi var. bolanderi) 6-28 6.23.1 Conservation status 6-28 6.23.2 Distribution 6-29 6.23.2.1 General distribution 6-29 6.23.2.2 Plan area 6-29 6.23.3 Description and life history 6-29 6.23.4 Habitat requirements 6-29 iv 6.23.5 Threats 6-29 6.23.6 Population trend 6-29 6.24 Bolander’s Beach Pine (Pinus contorta ssp. bolanderi) 6-29 6.24.1 Conservation status 6-29 6.24.2 Distribution 6-29 6.24.2.1 General distribution 6-29 6.24.2.2 Plan area 6-30 6.24.3 Description and life history 6-30 6.24.4 Habitat requirements 6-30 6.24.5 Threats 6-30 6.24.6 Population trend 6-30 6.25 White-Flowered Rein Orchid (Piperia candida) 6-30 6.25.1 Conservation status 6-30 6.25.2 Distribution 6-31 6.25.2.1 General distribution 6-31 6.25.2.2 Plan area 6-31 6.25.3 Description and life history 6-31 6.25.4 Habitat requirements 6-31 6.25.5 Threats 6-31 6.25.6 Population trend 6-31 6.26 North Coast Semaphore Grass (Pleuropogon hooverianus) 6-32 6.26.1 Conservation status 6-32 6.26.2 Distribution 6-32 6.26.2.1 General distribution 6-32 6.26.2.2 Plan area 6-32 6.26.3 Description and life history 6-33 6.26.4 Habitat requirements 6-33 6.26.5 Threats 6-33 6.26.6 Population trend 6-33 6.27 Great Burnet (Sanguisorba officinalis) 6-33 6.27.1 Conservation status 6-33 6.27.2 Distribution 6-34 6.27.2.1 General distribution 6-34 6.27.2.2 Plan area 6-34 6.27.3 Description and life history 6-34 6.27.4 Habitat requirements 6-34 6.27.5 Threats 6-34 6.27.6 Population trend 6-34 6.28 Maple-Leaved Checkerbloom (Sidalcea malachroides) 6-34 6.28.1 Conservation status 6-34 6.28.2 Distribution 6-35 6.28.2.1 General distribution 6-35 6.28.2.2 Plan area 6-35 6.28.3 Description and life history 6-35 6.28.4 Habitat requirements 6-35 6.28.5 Threats 6-36 6.28.6 Population trend 6-36 6.28.7 Mendocino lighting complex (2008) 6-36 6.29 Purple-stemmed Checkerbloom (Sidalcea malviflora ssp.