Scientific Name

Senecio flaccidus

Full Sun

Low

Moderate

Max. Height × Width

5'x4'

More information

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Price & Availability


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As a name, “Threadleaf Ragwort”may sound like a character out of Tolkien, but it’s actually the common name of a rather uncommon plant.

With grayish, Artemesia-esque leaves and weirdly misshapen, yellow flowers, sun-loving Senecio flaccidus is a local nerd-plant in the Asteraceae family. It can be spotted growing in the sandy washes of wide canyon bottoms in the Verdugo and San Gabriel Mountains and will be happiest in similarly thin, fast-draining soil with a layer of gravel mulch.

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Bitter Gooseberry

Ribes amarum

flowers

Blue Dicks

Dipterostemon (Dichelostemma) capitatus

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Blue Elderberry

Sambucus nigra ssp. caerulea

Blue Wildrye

Elymus glaucus

Branching Phacelia

Phacelia ramosissima

Brickell Bush

Brickellia californica

California Aster

Corethrogyne filaginifolia

California Aster

Corethrogyne filaginifolia

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California Four O’Clock

Mirabilis laevis var. crassifolia

California Fuchsia

Epilobium canum ssp. canum

California Prickly Phlox

Linanthus californicus

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Canyon Dudleya

Dudleya cymosa

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Cardinal Catchfly

Silene laciniata

Caterpillar Phacelia

Phacelia cicutaria

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Coast Live Oak

Quercus agrifolia

Coast Prickly Pear

Opuntia littoralis

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Coffeeberry

Frangula californica

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Fiesta Flower

Pholistoma auritum

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Fuchsiaflower Gooseberry

Ribes speciosum

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Hollyleaf Redberry

Rhamnus ilicifolia

Longstem Buckwheat

Eriogonum elongatum

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Mountain Mahogany

Cercocarpus betuloides

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Poison Oak

Toxicodendron diversilobum

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Punch Bowl Godetia

Clarkia bottae

Rooreh

Claytonia perfoliata

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Round Leafed Boykinia

Boykinia rotundifolia

Sacred Datura

Datura wrightii

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Santa Barbara Honeysuckle

Lonicera subspicata var. denudata

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Saw-Toothed Goldenbush

Hazardia squarrosa var. grindelioides

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Scarlet Larkspur

Delphinium cardinale

Silver Puffs

Uropappus lindleyi

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Soap Plant

Chloroglaum pomeridianum

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Southern Bush Monkeyflower

Diplacus longiflorus

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Southern California Black Walnut

Juglans californica

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Spotted Humboldt’s Lily

Lilium humboldtii ssp. ocellatum

Sunflower

Helianthus annuus

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Toyon

Heteromeles arbutifolia

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Western Columbine

Aquilegia formosa

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Western Wallflower

Erysimum capitatum

Wild Heliotrope