cotoneasters

genus Cotoneaster

Member of rose family (family Rosaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

Except for extremely rare examples that I don't expect to encounter, there are no other wild species of this genus in the bay area.

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Key features:

• plant height
• leaf length and width, thick or thin, veins sunken or not, color
• flower or fruit color (either works)

See also toyon (Heteromeles arbutifolia).

wall cotoneaster
Cotoneaster horizontalis

• shrub 0.5–1 m
• leaf blade blade 4–14 mm, widely elliptic; adaxially ± glabrous, shiny; abaxially sparsely appressed hairy, tip acute
• very rare: Mt. Tam

Edibility: Almost no one on the internet has tried cotoneaster fruit. Some sources say that it would take a large amount to harm an adult. But since the one taste tester seemed unimpressed, you might as well avoid them. [source]

Toxicity of cotoneaster (Cotoneaster spp.):
4 – Ingestion of these plants, especially in large amounts, is expected to cause serious effects to the heart, liver, kidneys or brain. If ingested in any amount, call the poison center immediately.

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3 observed taxons / 2 unobserved taxons / 1 key

Chris’s observations: 37 (7 are research grade)

Locations:

• Sweeney Ridge National Recreation Area: 8
• San Bruno Mountain State & County Park: 4
• Lake Chabot RP: 3
• San Pedro Valley CP: 3
• Sierra Azul OSP: 3
• Murray Ranch SP: 2
• Windy Hill OSP: 2
• Almaden Quicksilver CP
• Alum Rock Park, San Jose
• Dimond Canyon Trail, Oakland
• Golden Gate National Recreation Area
• Jacks Peak CP
• McNee Ranch / Montara Mountain SP
• Monte Bello OSP
• Mt. Tamalpais SP
• Rancho San Antonio OSP
• Sanborn CP
• Sibley Volcanic RP
• Waterdog Lake & Open Space

Months:

• Jun.: 3
• Jul.: 4
• Aug.: 4
• Sep.: 0
• Oct.: 5
• Nov.: 7
• Dec.: 4
• Jan.: 2
• Feb.: 4
• Mar.: 4

For more details, use advanced search.

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora