Santa Monica Mountains National Recreation Area

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Search Results:
Invasive Weeds

23 plants found




Family Apiaceae (Magnoliopsida | Asteranae | Apiales)

1

Poison Hemlock *
Conium maculatum

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

Location: 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

2

Sweet Fennel *
Foeniculum vulgare

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

Location: 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 Apocynaceae (Magnoliopsida | Asteranae | Gentianales)

3

Periwinkle *
Vinca major

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

Location: 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 Asphodelaceae (Magnoliopsida | Lilianae | Asparagales)

4

Onionweed *
Asphodelus fistulosus

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

Location: 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 Asteraceae(discoid) (Magnoliopsida | Asteranae | Asterales)

5

Thoroughwort *
Ageratina adenophora

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

Location: 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

6

Purple Star-thistle *
Centaurea calcitrapa

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

Location: 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

7

Yellow Star Thistle *
Centaurea solstitialis

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

Location: 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

8

Cardoon *
Cynara cardunculus ssp. cardunculus

TJM1: Cynara cardunculus.

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

Location: 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

9

German Ivy *
Delairea odorata

TJM1: Senecio mikanioides.

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

Location: 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

10

Russian Knapweed *
Rhaponticum repens 

TJM1: Acroptilon repens.
TJM2: Acroptilon repens.
F N A: Acroptilon repens.
A N F: Acroptilon repens.

Family: Asteraceae(discoid) (SUNFLOWER).
Other common names: hardheads.

Location: 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.

◊ This name is from the Jepson eFlora. It is more current than the TJM2 name.

Thumbnail Picture of Rhaponticum repens


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

11

Garland Chrysanthemum *
Glebionis coronaria

TJM1: Chrysanthemum coronarium.

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

Location: 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 Brassicaceae (Magnoliopsida | Rosanae | Brassicales)

12

Asian Mustard *
Brassica tournefortii

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

Location: 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

13

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.

Location: 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 Chenopodiaceae (Magnoliopsida | Caryophyllanae | Caryophyllales)

14

Southern Russian Thistle *
Salsola australis

TJM1: Salsola tragus.

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

Location: 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.

This common plant is frequently confused with Salsola tragus the "Tumbleweed" form, which is much less common in the SMM NRA.

Thumbnail Picture of Salsola australis


Family Euphorbiaceae (Magnoliopsida | Rosanae | Malpighiales)

15

Terracina Spurge *
Euphorbia terracina

TJM1: Not Listed.

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

Location: 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 | Rosanae | Fabales)

16

Spanish Broom *
Spartium junceum

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

Location: 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 Poaceae (Magnoliopsida | Lilianae | Poales)

17

Giant Reed *
Arundo donax

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

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

Characteristics: non-Native.

Note: Invasive exotic.

Thumbnail Picture of Arundo donax

18

Cheat Grass *
Bromus tectorum

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

Location: Paramount Ranch, valley grassland, March 2009.

Characteristics: non-Native.

Note: Invasive exotic.

Thumbnail Picture of Bromus tectorum

19

Uruguayan Pampas Grass *
Cortaderia selloana

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

Location: PCH road margin: coastal sage scrub, Sept 2009.

Characteristics: non-Native.

Note: Invasive exotic.

Thumbnail Picture of Cortaderia selloana

20

Fountain Grass *
Pennisetum setaceum

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

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

Characteristics: non-Native.

Note: Invasive exotic.

Thumbnail Picture of Pennisetum setaceum

21

Harding Grass *
Phalaris aquatica

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

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

Characteristics: non-Native.

Note: Invasive exotic.

Thumbnail Picture of Phalaris aquatica


Family Rosaceae (Magnoliopsida | Rosanae | Rosales)

22

Himalayan blackberry *
Rubus armeniacus

TJM1: Rubus discolor.

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

Location: 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 Simaroubaceae (Magnoliopsida | Rosanae | Sapindales)

23

Tree of Heaven *
Ailanthus altissima

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

Location: 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





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