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Home Events - CNPS Marin Field Trip Indian Valley Open Space Preserve Winter Plant Walk
Oak tree in Indian Valley

Indian Valley Open Space Preserve Winter Plant Walk

Meetup Registration Link

If you have not done so already, please sign the NEW!!! Waiver for Marin Chapter 2025.

Leaders: Stacey Pogorzelski and Caroline Christman

Join us for an approximately 2-mile meander through oak woodlands and seasonal streams of the Indian Valley Preserve. We will encounter plants beginning their winter/spring growth. The area hosts valley, black, and coast live oak, madrone, bay laurel, California buckeye, understory shrubs, grasses, vines, geophytes, and annuals. We might even see some early-blooming manzanita! The trail has some steeper sections, so bring hiking poles if you use them.  We will be starting out on the Pacheco Pond Fire Road, heading towards Pacheco Pond.

Directions: Meet at the College of Marin Indian Valley Campus.  Go to the west entrance parking lot 5 (between Lot 5 and Lot 6).  You can park in Lot 5 for free, or buy a permit for the other lots. From Lot 6, face the IVC Farm and walk to the left of the buildings. We will continue onto the Ken Harth Waterfall Trail.  Accessible by Marin Transit #57.

See  INaturalist plant species list

Limit of 15 attendees       Heavy rain postpones/cancels.

Indian Valley Open Space Plant Species (observed on 1/4/2025)
Common Name Scientific Name Family Notes
Henderson’s Shooting Star Primula hendersonii Primulaceae   
California polypody fern Polypodium californica Polypodiaceae  
Silverpuffs Uropappus lindleyi Asteraceae    ID is uncertain
Sword fern Polystichum munitum Dryopteridaceae  
Goldback fern Pentagramma triangularis Pteridaceae   
California wood fern Dryopteris arguta Dryopteridaceae  
Maidenhair fern Adiantum jordanii Pteridaceae
Toyon Heteromeles arbutifolia Rosaceae 
Pacific madrone Arbutus menziesii Ericaceae  
Common manzanita Arctostphylos manzanita Ericaceae   
Wood rose Rosa gymnocarpa Rosaceae  
Snowberry Symphoricarpos albus Caprifoliaceae  
California honeysuckle Lonicera hispidula Caprifoliaceae   
California blackberry Rubus ursinus Rosaceae   
California barberry Berberis pinnata Berberidaceae    Observation not recorded in Calflora
Pacific sanicle Sanicula crassicaulis Apiaceae   
Laceleaf sanicle Sanicula laciniata Apiaceae   
Yarrow Achillea millefolium Asteraceae  
Coast live oak Quercus agrifolia Fagaceae
Black oak Quercus kelloggii Fagaceae  
Valley oak Quercus lobata Fagaceae  
Torrey’s melic grass Melica torreyana Poaceae   
Bedstraw Galium Rubiaceae    Which galium was this?
California bay laurel Umbellularia californica Lauraceae   
Soap plant Chlorogalum pomeridianum Agavaceae
Douglas iris Iris douglasiana Iridaceae
Oceanspray Holodiscus discolor Rosaceae   
California buckeye Aesculus californica Sapindaceae
Hedge nettle Stachys ajugoides Lamiaceae  
Coastal Sagebrush Artemisia californica Asteraceae   
Coyote mint Monardella villosa Lamiaceae   
Redberry buckthorn Rhamnus crocea Rhamnaceae    ID is uncertain
Common rush Juncus patens Juncaceae   
Broadlead cattail Typha latifolia Typhaceae  
California buttercup Ranunculus californicus Ranunculaceae
Milkmaids Cardamine californica Brassicaceae  
Western hondstongue Adelinia grandis Boraginaceae   
Yerba buena Clinopodium douglasii Lamiaceae   
Poison oak Toxicodendron diversilobum Anacardiaceae  
Blue wild rye Elymus glaucus Poaceae 
California fescue Festuca californica Poaceae  I think it was californica and not idahoensis based on size and location
Sedge Carex Cyperaceae  Not sure of species, probably multiple species
Juniper high-cap moss Polytrichum juniperinum Polytrichaceae   Observation not recorded in Calflora
Crescent cup liverwort Lunularia cruciata Lunulariaceae  Not native to California
Cud weed Psuedognaphliam californica Asteraceae    ID is uncertain, possibly multiple species
Coffeeberry Frangula californica Rhamnaceae   
Sticky monkeyflower Diplacus aurantiacus Phrymaceae   
Coyote brush Baccharis pilularis Asteraceae   
Bee plant Scrophularia californica Scrophulariaceae
Tarweed Madia Asteraceae   Not sure of species, probably multiple species

Date

Jan 04 2025
Expired!

Time

10:00 am - 12:30 pm
Category
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