gumplants

genus Grindelia

Member of yellow sunflower-like flowers
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild species of this genus in the bay area.

Key features:

plant (e.g. involucre) hairy or not
leaves fleshy or not
coastal dunes or not

hairy gumweed
Grindelia hirsutula

hairy gumweed
Grindelia hirsutula

[Jepson says that the phyllaries are flattened throughout [?], gradually tapered to tips, tips erect, but that’s all bullshit]
leaves not fleshy
plants generally ± hairy [example]
Ecology: sandy, clay, or serpentine slopes or roadsides

great valley gumweed
Grindelia camporum

great valley gumweed
Grindelia camporum

phyllaries flattened only at bases, rounded in cross-section distally, abruptly narrowed to tips
phyllary tips spreading, reflexed, or coiled [not erect] [example]
leaves not fleshy
plants generally glabrous
Ecology: sandy or saline bottomland, roadsides

oregon gumplant
Grindelia stricta

oregon gumplant
Grindelia stricta

leaves ± fleshy
Ecology: coastal bluffs, dunes, tidal wetlands

3 observed taxons / 1 unobserved taxon / 2 keys

Chris’s observations: 22 (19 are research grade)

Locations:

Sunol Wilderness RP: 3
McNee Ranch / Montara Mountain SP: 2
Máyyan 'Ooyákma Coyote Ridge OSP: 2
Russian Ridge OSP: 2
Santa Teresa CP: 2
Almaden Quicksilver CP
Andrew Molera SP
Joseph D. Grant CP
Long Ridge OSP
Monte Bello OSP
Mt. Diablo SP
Point Lobos SP
Salinas River
San Bruno Mountain State & County Park
Skyline Ridge OSP
Stevens Creek CP

Months:

Apr.: 3
May: 5
Jun.: 4
Jul.: 1
Aug.: 3
Sep.: 5
Oct.: 0
Nov.: 1

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora