2026 Species Accounts: Plants

Yellow Sand Verbena
Abronia latifolia

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Silver Wattle

  • 9/16: College of Marin Ecological Study Area, Kentfield, CA

Maple
Acer

  • 5/12: Kentfield, CA. Uncertain ID

Common Yarrow
Achillea millefolium

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Silver Beachweed
Ambrosia chamissonis

  • 8/7: Marin County, CA.

Pacific Madrone
Arbutus menziesii

  • 5/11: Kentfield, CA.
  • 7/21: Sky Oaks/Marin Municipal Water District Watershed, Marin, California.
  • 7/21: Marin County, CA.
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Common Manzanita
Arctostaphylos manzanita

  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Sea Thrift
Armeria maritima

  • 5/31: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.

California Mugwort
Artemisia douglasiana

  • 4/19: Osborn Preserve, Sonoma County, CA.

Coastal Sagewort
Artemisia pycnocephala

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Fat-Hen
Atriplex prostrata

  • 8/7: Kent Island, Marin County, CA.

Coyote Brush
Baccharis pilularis

  • 4/19: Sonoma County, CA.
  • 5/11: Kentfield, CA.
  • 5/12: Kentfield, CA.
  • 5/29: Newport, OR.
  • 7/21: Marin County, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Borage
Borago officinalis

  • 10/1: Indian Valley campus, Novato, CA.

Field Mustard
Brassica rapa

  • 5/31: Agate Beach, Newport, OR.

Greater Quaking Grass
Briza maxima

  • 5/31: Newport, OR.

European Marram Grass
Calamagrostis arenaria

  • 8/7: Kent Island, Marin County, CA.

Italian Thistle
Carduus pycnocephalus

  • 5/12: Kentfield, CA.

Sea Fig
Carpobrotus edulis

  • 8/7: Kent Island, Marin County, CA. On this day I participated in an invasive species removal day hosted by Marin County Parks, during which we removed piles and piles of this plant.

Johnny-nip
Castilleja ambigua

  • 5/29: Newport, OR.

Purple Star-Thistle
Centaurea calcitrapa

  • 10/1: Indian Valley campus, Novato, CA.

Slender Centaury
Centaurium tenuiflorum

  • 6/23: Novato, CA.

Coontail
Ceratophyllum demersum

  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Cobwebby Thistle
Cirsium occidentale

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Yerba Buena
Clinopodium douglasii

  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Poison Hemlock
Conium maculatum

  • 5/12: Kentfield, CA.

Turkey Mullein
Croton setiger

  • 7/21: Kent Island, Marin County, CA.

Pacific Goldenthread
Cuscuta pacifica pacifica

  • 5/29: Newport, OR.

Ookow
Dichelostemma congestum

  • 4/19: Sonoma County, CA.

Purple Foxglove
Digitalis purpurea

  • 5/29: Newport, OR.

Saltgrass
Distichlis spicata

  • 8/7: Marin County, CA.
  • Add walking field trips for Spring and Fall

Great Horsetail
Equisetum telmateia

  • 4/19: Osborn Preserve, Sonoma County, CA. Braun’s Giant Horsetail (Equisetum telmateia braunii)
  • 5/29: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Seaside Daisy
Erigeron glaucus

  • 5/31: Agate Beach, Newport, OR. Seen on the bluff near the lighthouse.

California poppy
Eschscholzia californica

  • 5/11: Kentfield, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA. Coastal subspecies.
  • 10/1: Indian Valley campus, Novato, CA.

Red Fescue
Festuca rubra

  • 8/7: Marin County, CA.

Fennel
Foeniculum vulgare

  • 5/12: Kentfield, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Beach Strawberry
Fragaria chiloensis

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Alkali Heath
Frankenia salina

  • 8/7: Marin County, CA.

Catchweed Bedstraw
Galium aparine

  • 5/12: Kentfield, CA.

Salal
Gaultheria shallon

  • 5/29: Newport, OR.
  • 5/30: Agate Beach, Newport, OR.
  • 5/31: Agate Beach, Newport, OR.

Herb Robert
Geranium robertianum

  • 5/12: Larkspur, CA.

Oregon Gumplant
Grindelia stricta

  • 8/7: Bolinas, CA 94924.
  • 8/7: Marin County, CA.
  • 9/16: College of Marin Ecological Study Area, Kentfield, CA
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Common Cowparsnip
Heracleum maximum

  • 4/19: Sonoma County, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Toyon
Heteromeles arbutifolia

  • 5/12: Kentfield, CA.

Marsh Jaumea
Jaumea carnosa

  • 5/29: Newport, OR.
  • 8/7: Marin County, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Northern California Black Walnut
Juglans hindsii

  • 5/11: Kentfield, CA.

Oxeye Daisy
Leucanthemum vulgare

  • 5/29: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.

American lyme grass
Leymus mollis

  • 8/7: Marin County, CA.

Pink Honeysuckle
Lonicera hispidula

  • 4/19: Osborn Preserve, Sonoma County, CA.

Twinberry Honeysuckle
Lonicera involucrata

  • 5/31: Newport, OR.

Narrow-leaf Bird’s-foot Trefoil
Lotus tenuis

  • 8/7: Marin County, CA.

Coastal Bush Lupine
Lupinus arboreus

  • 5/29: Newport, OR.
  • 5/31: Newport, OR.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Scarlet Pimpernel
Lysimachia arvensis

  • 6/23: Novato, CA.

Sea Milkwort
Lysimachia maritima

  • 5/29: Newport, OR.

Western Lily of the Valley
Maianthemum dilatatum

  • 5/30: Agate Beach, Newport, OR.

Coastal Manroot
Marah oregana

  • 5/31: Agate Beach, Newport, OR.

Pennyroyal
Mentha pulegium

  • 7/21: Marin County, CA.
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Tanoak
Notholithocarpus densiflorus

  • 5/11: Kentfield, CA. Seen in the Ecological Study Area owned by the College of Marin

Goldback Fern
Pentagramma triangularis

  • 6/23: Novato, CA. Growing wild in my backyard.

Sitka Spruce
Picea sitchensis

  • 5/29: Newport, OR.

Lodgepole Pine
Pinus contorta

  • 5/30: Agate Beach, Newport, OR.
  • 5/31: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.

Buck’s-horn Plantain
Plantago coronopus

  • 5/31: Agate Beach, Newport, OR.
  • 8/7: Kent Island, Bolinas, Marin County, CA.

Sea Plantain
Plantago maritima

  • 8/7: Kent Island, Bolinas, Marin County, CA.

California Polypody
Polypodium californicum

  • 5/11: Kentfield, CA.

Western Sword Fern
Polystichum munitum

  • 5/11: Kentfield, CA.
  • 5/30: Agate Beach, Newport, OR.
  • 5/31: Agate Beach, Newport, OR.

California Cudweed
Pseudognaphalium californicum

  • 6/23: Novato, CA.

Common Bracken
Pteridium aquilinum

  • 4/19: Sonoma County, CA.
  • 5/30: Agate Beach, Newport, OR.
  • 5/31: Agate Beach, Newport, OR.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA. Subspecies: Hairy Brackenfern (Pteridium aquilinum pubescens).

Coast Live Oak
Quercus agrifolia

  • 4/19: Sonoma County, CA.
  • 5/11: Kentfield, CA.
  • 5/12: Kentfield, CA.
  • 5/12: Larkspur, CA.
  • 6/23: Novato, CA.
  • 7/21: Marin County, CA.
  • 9/16: College of Marin Ecological Study Area, Kentfield, CA
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

California Black Oak
Quercus kelloggii

  • 7/21: Marin County, CA.

Valley Oak
Quercus lobata

  • 5/11: Kentfield, CA.
  • 5/12: Kentfield, CA.
  • 6/23: Novato, CA.
  • 7/21: Marin County, CA.

California Wild Rose
Rosa californica

  • 4/19: Sonoma County, CA.

Rugosa Rose
Rosa rugosa

  • 5/29: Newport, OR.

Armenian Blackberry
Rubus armeniacus

  • 4/19: Sonoma County, CA.
  • 5/11: Kentfield, CA.
  • 5/29: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.
  • 6/23: Novato, CA.
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Salmonberry
Rubus spectabilis

  • 5/30: Agate Beach, Newport, OR. Uncertain ID.

California Blackberry
Rubus ursinus

  • 4/19: Sonoma County, CA.
  • 4/19: Rohnert Park, CA.
  • 5/29: Newport, OR.
  • 5/31: Agate Beach, Newport, OR.
  • 6/23: Novato, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Pacific Glasswort
Salicornia pacifica

  • 5/29: Newport, OR.
  • 8/7: Marin County, CA.
  • 9/16: Corte Madera Creek, Kentfield, CA.

Giant Sequoia
Sequoiadendron giganteum

  • 7/21: Marin County, CA. This is a known ornamental planting done by water department rangers in the early 20th century. Although not wild, it is interesting so I’m including it here.

Western Blue-eyed Grass
Sisyrinchium bellum

  • 4/19: Sonoma County, CA.

California Hedge Nettle
Stachys bullata

  • 4/19: Sonoma County, CA.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Coastal Hedge-Nettle
Stachys chamissonis

  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Deer Fern
Struthiopteris spicant

  • 5/30: Agate Beach, Newport, OR.

Pacific Aster
Symphyotrichum chilense

  • 5/31: Newport, OR.
  • 9/26: Abbott’s Lagoon, Point Reyes, Marin County, CA.

Fringe Cups
Tellima grandiflora

  • 5/30: Agate Beach, Newport, OR.

California Torreya
Torreya californica

  • 6/23: Novato, CA.

Pacific Poison Oak
Toxicodendron diversilobum

  • 4/19: Sonoma County, CA.
  • 5/12: Kentfield, CA.
  • 5/12: Larkspur, CA.
  • 6/18: Novato, CA.
  • 6/23: Novato, CA.
  • 7/21: Marin County, CA.
  • 8/7: Marin County, CA.
  • 10/1: Indian Valley/Pacheco Pond, Marin County, CA.

Lesser Hop Trefoil
Trifolium dubium

  • 5/31: Agate Beach, Newport, OR. Uncertain ID

Rose Clover
Trifolium hirtum

  • 4/19: Sonoma County, CA.

Giant Wakerobin
Trillium chloropetalum

  • 4/19: Sonoma County, CA.

Southern Cattail
Typha domingensis

  • 7/21: Marin County, CA.

Broad-leaved Cattail
Typha latifolia

  • 9/26: Marin County, CA.

California Bay
Umbellularia californica

  • 5/12: Kentfield, CA.
  • 10/1: Indian Valley/Pacheco Pond, Novato, CA.

Common Vetch
Vicia sativa

  • 5/12: Kentfield, CA.

Greater Periwinkle
Vinca major

  • 5/11: Kentfield, CA.
  • 5/12: Kentfield, CA.

Let me know what you think!

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