Illustrated Plant List

OC CNPS Emergent Invasives

logo Calflora Illustrated Plant List 

Used by the Orange County Chapter of CNPS to monitor a dynamic list of Emergent Invasive Plants within Orange County. As defined by OC CNPS, these are non-native plants that are recently arrived in OC or with very few populations and are believed to pose a significant threat to our natural areas. More information can be found at www.occnps.org, under Invasive Plants.
16 PLANTS
Aegilops triuncialis    Barbed goatgrass
invasive non-native
Annual grass

POACEAE

Aegilops triuncialis Aegilops triuncialis Aegilops triuncialis
2007 Neal Kramer
2001 Joe DiTomaso
2005 Steve Matson

Cenchrus echinatus    Southern sandbur
invasive non-native
Annual grass

POACEAE

Cenchrus echinatus Cenchrus echinatus Cenchrus echinatus
2012 Zoya Akulova
2012 Zoya Akulova
2012 Zoya Akulova

Cenchrus longispinus    Mat sandbur
invasive non-native
Annual grass

POACEAE

Cenchrus longispinus Cenchrus longispinus Cenchrus longispinus
2013 Trent M. Draper
2013 Trent M. Draper
2011 Aaron Arthur

Centaurea solstitialis    Barnaby's thistle,  Yellow star thistle
invasive non-native
Annual herb

ASTERACEAE

Centaurea solstitialis Centaurea solstitialis Centaurea solstitialis
2004 Carol W. Witham
2008 Luigi Rignanese
2014 Robert F Norris

Chrysanthemoides monilifera   
non-native

ASTERACEAE

Chrysanthemoides monilifera Chrysanthemoides monilifera Chrysanthemoides monilifera
2013 Ron Vanderhoff
2013 Ron Vanderhoff
2013 Ron Vanderhoff

Dittrichia graveolens    Stinkwort
invasive non-native
Annual herb

ASTERACEAE

Dittrichia graveolens Dittrichia graveolens Dittrichia graveolens
2008 Keir Morse
2014 Neal Kramer
2003 Dean Wm. Taylor

Ehrharta calycina    Perennial veldt grass,  Perennial veldtgrass
invasive non-native
Perennial grass

POACEAE

Ehrharta calycina Ehrharta calycina Ehrharta calycina
2013 Dale Ritenour
2015 Zoya Akulova
2014 Neal Kramer

Emex spinosa    Devil's thorn,  Spiny threecornerjack
invasive non-native
Annual herb

POLYGONACEAE

Emex spinosa Emex spinosa Emex spinosa
2008 Larry Sward
2008 Larry Sward
2008 Larry Sward

Hypericum canariense    Canary island st. johnswort
invasive non-native
Shrub

HYPERICACEAE

Hypericum canariense Hypericum canariense Hypericum canariense
2007 Neal Kramer
2008 John Dittes
2011 Neal Kramer

Iris pseudacorus    Horticultural iris,  Paleyellow iris,  Water iris
invasive non-native
Perennial herb

IRIDACEAE

Iris pseudacorus Iris pseudacorus Iris pseudacorus
2004 Nick Kurzenko
2014 Dr. Amadej Trnkoczy
2014 Dr. Amadej Trnkoczy

Melinis repens    Natal grass
non-native
Annual grass

POACEAE

Melinis repens Melinis repens Melinis repens
2007 Zoya Akulova
2015 Ron Vanderhoff
2015 Ron Vanderhoff

Oncosiphon piluliferum    Stinknet
non-native
Annual herb

ASTERACEAE

Oncosiphon piluliferum Oncosiphon piluliferum Oncosiphon piluliferum
2003 Dean Wm. Taylor
2012 Richard Spellenberg
2015 Anna Bennett

Parthenium hysterophorus    Santa maria feverfew
non-native
Perennial herb

ASTERACEAE

Parthenium hysterophorus Parthenium hysterophorus Parthenium hysterophorus
© 2015 Richard Spellenberg
2015 Richard Spellenberg
2015 Richard Spellenberg

Rubus armeniacus    Himalayan blackberry
invasive non-native
Shrub

ROSACEAE

Rubus armeniacus Rubus armeniacus Rubus armeniacus
2002 George W. Hartwell
2008 Thomas Stoughton
2009 Zoya Akulova

Senecio linearifolius var. linearifolius    Linear-leaved australian fireweed
non-native
Annual, Perennial herb

ASTERACEAE

Senecio linearifolius var. linearifolius Senecio linearifolius var. linearifolius Senecio linearifolius var. linearifolius
2007 Brant Primrose
2007 Brant Primrose
2007 Brant Primrose

Volutaria tubuliflora    Egyptian knapweed
non-native
Annual herb

ASTERACEAE

Volutaria tubuliflora Volutaria tubuliflora Volutaria tubuliflora
2016 Barbara Boethling
2015 Ron Vanderhoff
2015 Ron Vanderhoff