Contra Costa County

Showing 1–50 of 341 (introduced).

• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae
• 
  Acacia dealbata Link Introduced ACDE3

  silver wattle · Fabaceae
• 
  Acacia melanoxylon R. Br. Introduced ACME

  blackwood · Fabaceae
• 
  Acacia paradoxa DC. Introduced ACPA8

  paradox acacia · Fabaceae
• 
  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae
• 
  Aegilops triuncialis L. Introduced AETR

  barbed goatgrass · Poaceae
• 
  Agrostis avenacea J.F. Gmel. Introduced AGAV

  Pacific bentgrass · Poaceae
• 
  Agrostis stolonifera L. Introduced AGST2

  creeping bentgrass · Poaceae
• 
  Aira caryophyllea L. Introduced AICA

  silver hairgrass · Poaceae
• 
  Aira caryophyllea L. var. cupaniana (Guss.) Fiori Introduced AICAC3

  silver hairgrass · Poaceae
• 
  Alhagi maurorum Medik. Introduced ALMA12

  camelthorn · Fabaceae
• 
  Allium neapolitanum Cirillo Introduced ALNE3

  white garlic · Liliaceae
• 
  Alopecurus myosuroides Huds. Introduced ALMY

  slender meadow foxtail · Poaceae
• 
  Alyssum strigosum Banks & Sol. Introduced ALST2

  alyssum · Brassicaceae
• 
  Amaranthus albus L. Introduced AMAL

  prostrate pigweed · Amaranthaceae
• 
  Amaranthus blitoides S. Watson Introduced AMBL

  mat amaranth · Amaranthaceae
• 
  Amaranthus deflexus L. Introduced AMDE

  largefruit amaranth · Amaranthaceae
• 
  Amaryllis belladonna L. Introduced AMBE3

  belladonna lily · Liliaceae
• 
  Anagallis arvensis L. Introduced ANAR

  scarlet pimpernel · Primulaceae
• 
  Anagallis arvensis L. ssp. arvensis Introduced ANARA7

  scarlet pimpernel · Primulaceae
• 
  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae
• 
  Anthriscus caucalis M. Bieb. Introduced ANCA14

  bur chervil · Apiaceae
• 
  Antirrhinum majus L. Introduced ANMA3

  garden snapdragon · Scrophulariaceae
• 
  Aphanes arvensis L. Introduced APAR2

  field parsley piert · Rosaceae
• 
  Apium graveolens L. Introduced APGR2

  wild celery · Apiaceae
• 
  Apium graveolens L. var. dulce (Mill.) DC. Introduced APGRD

  wild celery · Apiaceae
• 
  Arabidopsis thaliana (L.) Heynh. Introduced ARTH

  mouseear cress · Brassicaceae
• 
  Araujia sericifera Brot. Introduced ARSE8

  white bladderflower · Asclepiadaceae
• 
  Argyranthemum foeniculum (Willd.) Sch. Bip. Introduced ARFO7

  dill daisy · Asteraceae
• 
  Artemisia annua L. Introduced ARAN3

  sweet sagewort · Asteraceae
• 
  Arundo donax L. Introduced ARDO4

  giant reed · Poaceae
• 
  Asclepias fruticosa L. Introduced ASFR13

  African milkweed · Asclepiadaceae
• 
  Asparagus asparagoides (L.) Druce Introduced ASAS4

  African asparagus fern · Liliaceae
• 
  Asparagus officinalis L. Introduced ASOF

  garden asparagus · Liliaceae
• 
  Atriplex semibaccata R. Br. Introduced ATSE

  Australian saltbush · Chenopodiaceae
• 
  Atriplex suberecta I. Verd. Introduced ATSU80

  peregrine saltbush · Chenopodiaceae
• 
  Avena barbata Pott ex Link Introduced AVBA

  slender oat · Poaceae
• 
  Avena fatua L. Introduced AVFA

  wild oat · Poaceae
• ⚘
  Avena occidentalis Durieu Introduced AVOC

  western oat · Poaceae
• 
  Avena sterilis L. Introduced AVST

  animated oat · Poaceae
• 
  Bassia hyssopifolia (Pall.) Kuntz Introduced BAHY

  fivehorn smotherweed · Chenopodiaceae
• 
  Bassia scoparia (L.) A.J. Scott Introduced BASC5

  burningbush · Chenopodiaceae
• 
  Bellardia trixago (L.) All. Introduced BETR

  Mediterranean lineseed · Scrophulariaceae
• 
  Beta vulgaris L. Introduced BEVU2

  common beet · Chenopodiaceae
• 
  Boehmeria nivea (L.) Gaudich. Introduced BONI2

  Chinese grass · Urticaceae
• 
  Brachypodium distachyon (L.) P. Beauv. Introduced BRDI2

  purple false brome · Poaceae
• 
  Brassica nigra (L.) W.D.J. Koch Introduced BRNI

  black mustard · Brassicaceae
• 
  Brassica rapa L. Introduced BRRA

  field mustard · Brassicaceae
• 
  Brassica rapa L. var. rapa Introduced BRRAR

  field mustard · Brassicaceae
• 
  Briza maxima L. Introduced BRMA

  big quakinggrass · Poaceae