Santa Monica Mountains National Recreation Area

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Search: Invasive Weeds

23 species matched this search criteria




Family Asteraceae (radiate) (Magnoliopsida | Asteridae | Asterales)

1
Garland Chrysanthemum *
Glebionis coronaria

TJM1: Chrysanthemum coronarium.

Family: Asteraceae (radiate) (SUNFLOWER).
Other common names: crown daisy, garland daisy.
Generic common name: DAISY.

Point Dume Natural Preserve: coastal sage scrub, March 2006.

Characteristics: non-Native, White, Yellow, Large, Solitary, Simple, Herbaceous, Annual, Early Spring, Late Spring, Summer.

Note: Invasive exotic.
Thumbnail Picture of Glebionis coronaria


Family Asteraceae (discoid) (Magnoliopsida | Asteridae | Asterales)

2
Russian Knapweed *
Acroptilon repens


Family: Asteraceae (discoid) (SUNFLOWER).
Other common names: hardheads.
Generic common name: RUSSIAN KNAPWEED, HARDHEADS.

Rancho Sierra Vista/Satwiwa: Near Equestrian parking lot, disturbed grassland, June 2005.

Characteristics: non-Native, Red, Medium, Solitary, Simple, Herbaceous, Perennial, Late Spring, Summer.

Note: Invasive exotic, NOXIOUS WEED.
Thumbnail Picture of Acroptilon repens

3
Thoroughwort *
Ageratina adenophora


Family: Asteraceae (discoid) (SUNFLOWER).
Other common names: eupatory, sticky snakeroot, croften weed.
Generic common name: SNAKEROOT.

Topanga State Park: Rustic Canyon Trail, oak woodland, Sept 2009.

Characteristics: non-Native, White, Medium, Clusters, Simple, Woody, Perennial, Winter, Early Spring, Late Spring, Summer, Fall.

Note: Invasive exotic.
Thumbnail Picture of Ageratina adenophora

4
Purple Star-thistle *
Centaurea calcitrapa


Family: Asteraceae (discoid) (SUNFLOWER).
Other common names: red star-thistle.
Generic common name: KNAPWEED, STAR-THISTLE.

Upper Las Virgenes Canyon Open Space: disturbed grassland, June 2006.

Characteristics: non-Native, Red, Medium, Solitary, Simple, Herbaceous, Annual, Late Spring.

Note: Invasive exotic, NOXIOUS WEED.
Thumbnail Picture of Centaurea calcitrapa

5
Yellow Star Thistle *
Centaurea solstitialis


Family: Asteraceae (discoid) (SUNFLOWER).
Other common names: Barnaby's thistle.
Generic common name: KNAPWEED, STAR-THISTLE.

Westlake Blvd. disturbed road margin: chaparral, Sept 2004.

Characteristics: non-Native, Yellow, Medium, Solitary, Simple, Herbaceous, Annual, Late Spring, Summer.

Note: Invasive exotic.
Thumbnail Picture of Centaurea solstitialis

6
Cardoon *
Cynara cardunculus ssp. cardunculus

TJM1: Cynara cardunculus.

Family: Asteraceae (discoid) (SUNFLOWER).
Other common names: artichoke thistle, artichoke.
Generic common name: CYNARA.

Arroyo Sequit: Arroyo Sequit Loop Trail, valley grassland, June 2004.

Characteristics: non-Native, Red, Large, Solitary, Simple, Herbaceous, Perennial, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Cynara cardunculus ssp. cardunculus

7
German Ivy *
Delairea odorata

TJM1: Senecio mikanioides.

Family: Asteraceae (discoid) (SUNFLOWER).
Generic common name: CAPE IVY, GERMAN IVY.

Topanga State Park: Los Liones Trail, chaparral, Nov 2006.

Characteristics: non-Native, Yellow, Small, Clusters, Simple, Woody, Perennial, Winter, Early Spring.

Note: Invasive exotic.
Thumbnail Picture of Delairea odorata


Family Apocynaceae (Magnoliopsida | Asteridae | Gentianales)

8
Periwinkle *
Vinca major


Family: Apocynaceae (DOGBANE).
Other common names: bigleaf periwinkle, greater periwinkle.
Generic common name: PERIWINKLE.

Backbone Trail between Zuma Ridge Trail and Kanan Trailhead: riparian woodland, April 2004.

Characteristics: non-Native, Blue, Large, Solitary, Simple, Herbaceous, Woody, Perennial, Early Spring, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Vinca major


Family Chenopodiaceae (Magnoliopsida | Caryophyllidae | Caryophyllales)

9
Southern Russian Thistle *
Salsola australis

TJM1: Salsola tragus.

Family: Chenopodiaceae (GOOSEFOOT).
Generic common name: RUSSIAN THISTLE.

Rancho Sierra Vista/Satwiwa: Big Sycamore Canyon Trail, valley grassland, July 2004.

Characteristics: non-Native, Green, Red, Small, Clusters, Simple, Herbaceous, Annual, Late Spring, Summer.

Frequently confused with Salsola tragus the "Tumbleweed" form, which is less common in the SMM NRA.
Thumbnail Picture of Salsola australis


Family Rosaceae (Magnoliopsida | Rosidae | Rosales)

10
Himalayan blackberry *
Rubus armeniacus

TJM1: Rubus discolor.

Family: Rosaceae (ROSE).
Other common names: Himalaya-berry.
Generic common name: BLACKBERRY, RASPBERRY.

Rocky Oaks: west end beyond the Rocky Oaks Loop Trail, riparian woodland, June 2010.

Characteristics: non-Native, White, Red, Large, Clusters, Simple, Woody, Perennial, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Rubus armeniacus


Family Apiaceae (Magnoliopsida | Rosidae | Apiales)

11
Poison Hemlock *
Conium maculatum


Family: Apiaceae (CARROT).
Generic common name: POISON HEMLOCK.

Point Mugu State Park: Big Sycamore Canyon Trail, riparian woodland, April 2004.

Characteristics: non-Native, White, Small, Clusters, Simple, Herbaceous, Annual, Perennial, Early Spring, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Conium maculatum

12
Sweet Fennel *
Foeniculum vulgare


Family: Apiaceae (CARROT).
Other common names: biscuit root, fennel.
Generic common name: FENNEL.

Circle X Ranch: Yerba Buena Road shoulder, chaparral, June 2004.

Characteristics: non-Native, Yellow, Small, Clusters, Simple, Herbaceous, Perennial, Late Spring, Summer.

Note: Invasive exotic.
Thumbnail Picture of Foeniculum vulgare


Family Euphorbiaceae (Magnoliopsida | Rosidae | Euphorbiales)

13
Terracina Spurge *
Euphorbia terracina

TJM1: Not Listed.

Family: Euphorbiaceae (SPURGE).
Other common names: Geraldton carnation weed.
Generic common name: SPURGE.

Solstice Canyon: TWR Loop Trail, chaparral, June 2004.

Characteristics: non-Native, Yellow, Green, Small, Clusters, Simple, Herbaceous, Perennial, Winter, Early Spring, Late Spring, Summer, Fall.

Note: Invasive exotic.
Thumbnail Picture of Euphorbia terracina


Family Fabaceae (Magnoliopsida | Rosidae | Fabales)

14
Spanish Broom *
Spartium junceum


Family: Fabaceae (PEA, LEGUME).
Other common names: gorse.
Generic common name: BROOM.

Circle X Ranch: Yerba Buena Road shoulder, chaparral, March 2004.

Characteristics: non-Native, Yellow, Large, Clusters, Odd, Woody, Perennial, Early Spring, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Spartium junceum


Family Simaroubaceae (Magnoliopsida | Rosidae | Sapindales)

15
Tree of Heaven *
Ailanthus altissima


Family: Simaroubaceae (QUASSIA, SIMAROUBA).
Other common names: stink tree.
Generic common name: AILANTHUS.

Encinal Canyon Road: disturbed margin near chaparral, June 2009.

Characteristics: non-Native, White, Small, Clusters, Simple, Woody, Perennial, Late Spring.

Note: Invasive exotic

The flower forms include male, female, and perfect. Further, these can occur in various combinations on individuals.
Thumbnail Picture of Ailanthus altissima


Family Brassicaceae (Magnoliopsida | Dilleniidae | Capparales)

16
Asian Mustard *
Brassica tournefortii


Family: Brassicaceae (MUSTARD).
Other common names: Sahara mustard.
Generic common name: MUSTARD, TURNIP.

Point Dume Natural Preserve: disturbed roadside, March 2006.

Characteristics: non-Native, Yellow, Small, Clusters, Odd, Herbaceous, Annual, Late Spring.

Note: Invasive exotic.
Thumbnail Picture of Brassica tournefortii

17
Perennial Peppergrass *
Lepidium latifolium


Family: Brassicaceae (MUSTARD).
Other common names: perennial pepperweed, broad leaved pepper grass, broadleaved pepperweed.
Generic common name: PEPPERGRASS, PEPPERWORT, PEPPERWEED, PEPPERCRESS.

Arroyo Sequit: entrance road shoulder, sage scrub, June 2004.

Characteristics: non-Native, White, Small, Clusters, Odd, Simple, Herbaceous, Perennial, Late Spring, Summer.

Note: Invasive exotic.
Thumbnail Picture of Lepidium latifolium


Family Asphodelaceae (Liliopsida | Liliidae | Liliales)

18
Onionweed *
Asphodelus fistulosus


Family: Asphodelaceae (ASPHODEL, ALOE), Liliaceae (LILY).
Other common names: false asphodel, asphodel.
Generic common name: ASPHODEL.

Malibu Creek State Park: Park Service access road, disturbed grassland, May 2006.

Characteristics: non-Native, White, Medium, Clusters, Simple, Herbaceous, Perennial, Late Spring.

Note: Invasive exotic, NOXIOUS WEED.
Thumbnail Picture of Asphodelus fistulosus


Family Poaceae (Liliopsida | Commelinidae | Cyperales)

19
Giant Reed *
Arundo donax


Family: Poaceae (GRASS).
Other common names: giant cane.
Generic common name: GIANT REED.

Point Mugu State Park: maintenance area near PCH, July 2009.

Characteristics: non-Native.

Note: Invasive exotic.
Thumbnail Picture of Arundo donax

20
Cheat Grass *
Bromus tectorum


Family: Poaceae (GRASS).
Other common names: downy brome.
Generic common name: BROME, CHESS.

Paramount Ranch, valley grassland, March 2009.

Characteristics: non-Native.

Note: Invasive exotic.
Thumbnail Picture of Bromus tectorum

21
Uruguayan Pampas Grass *
Cortaderia selloana


Family: Poaceae (GRASS).
Other common names: pampas grass.
Generic common name: PAMPAS GRASS.

PCH road margin: coastal sage scrub, Sept 2009.

Characteristics: non-Native.

Note: Invasive exotic.
Thumbnail Picture of Cortaderia selloana

22
Fountain Grass *
Pennisetum setaceum


Family: Poaceae (GRASS).
Other common names: crimson fountaingrass.
Generic common name: FOUNTAINGRASS.

Point Mugu State Park: PCH disturbed road margin and bluffs, May 2006.

Characteristics: non-Native.

Note: Invasive exotic.
Thumbnail Picture of Pennisetum setaceum

23
Harding Grass *
Phalaris aquatica


Family: Poaceae (GRASS).
Other common names: bulbous canarygrass.
Generic common name: CANARYGRASS.

Rancho Sierra Vista/Satwiwa: Wendy Trail, disturbed grassland, June 2006.

Characteristics: non-Native.

Note: Invasive exotic.
Thumbnail Picture of Phalaris aquatica




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