California

• Alameda 06001
  1,856 taxa Open ↗
• Alpine 06003
  1,174 taxa Open ↗
• Amador 06005
  1,226 taxa Open ↗
• Butte 06007
  2,704 taxa Open ↗
• Calaveras 06009
  1,227 taxa Open ↗
• Colusa 06011
  1,330 taxa Open ↗
• Contra Costa 06013
  1,712 taxa Open ↗
• Del Norte 06015
  1,424 taxa Open ↗
• El Dorado 06017
  1,950 taxa Open ↗
• Fresno 06019
  2,373 taxa Open ↗

Showing 8,451–8,499 of 8,499 (native).

• 
  Wolffia globosa (Roxb.) Hartog & Plas Native WOGL3

  Asian watermeal · Lemnaceae 5 counties
• 
  Wolffiella lingulata (Hegelm.) Hegelm. Native WOLI

  tongueshape bogmat · Lemnaceae 16 counties
• 
  Wolffiella oblonga (Phil.) Hegelm. Native WOOB

  saber bogmat · Lemnaceae 2 counties
• 
  Woodsia oregana D.C. Eaton Native WOOR

  Oregon cliff fern · Dryopteridaceae 11 counties
• 
  Woodsia oregana D.C. Eaton ssp. cathcartiana (B.L. Rob.) Windham Native WOORC2

  Oregon cliff fern · Dryopteridaceae 6 counties
• 
  Woodsia oregana D.C. Eaton ssp. oregana Native WOORO

  Oregon cliff fern · Dryopteridaceae 4 counties
• 
  Woodsia plummerae Lemmon Native WOPL

  Plummer's cliff fern · Dryopteridaceae 1 county
• 
  Woodsia scopulina D.C. Eaton Native WOSC

  Rocky Mountain woodsia · Dryopteridaceae 16 counties
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  Woodsia scopulina D.C. Eaton ssp. laurentiana Windham Native WOSCL

  Laurent's cliff fern · Dryopteridaceae 1 county
• 
  Woodsia scopulina D.C. Eaton ssp. scopulina Native WOSCS

  Rocky Mountain woodsia · Dryopteridaceae 15 counties
• 
  Woodwardia fimbriata Sm. Native WOFI

  giant chainfern · Blechnaceae 34 counties
• 
  Wyethia angustifolia (DC.) Nutt. Native WYAN

  California compassplant · Asteraceae 38 counties
• 
  Wyethia glabra A. Gray Native WYGL

  Coast Range mule-ears · Asteraceae 14 counties
• 
  Wyethia helenioides (DC.) Nutt. Native WYHE

  whitehead mule-ears · Asteraceae 29 counties
• 
  Wyethia longicaulis A. Gray Native WYLO

  Humboldt mule-ears · Asteraceae 3 counties
• 
  Wyethia mollis A. Gray Native WYMO

  woolly mule-ears · Asteraceae 19 counties
• 
  Xanthium strumarium L. Native XAST

  rough cocklebur · Asteraceae 43 counties
• 
  Xanthium strumarium L. var. canadense (Mill.) Torr. & A. Gray Native XASTC

  Canada cocklebur · Asteraceae 43 counties
• 
  Xanthium strumarium L. var. glabratum (DC.) Cronquist Native XASTG

  rough cocklebur · Asteraceae 1 county
• 
  Xerophyllum tenax (Pursh) Nutt. Native XETE

  common beargrass · Liliaceae 13 counties
• 
  Xylococcus bicolor Nutt. Native XYBI

  mission manzanita · Ericaceae 3 counties
• 
  Xylorhiza cognata (H.M. Hall) T.J. Watson Native XYCO2

  Mecca woodyaster · Asteraceae 2 counties
• 
  Xylorhiza orcuttii (Vasey & Rose) Greene Native XYOR

  Orcutt's aster · Asteraceae 3 counties
• 
  Xylorhiza tortifolia (Torr. & A. Gray) Greene Native XYTO2

  Mojave woodyaster · Asteraceae 6 counties
• 
  Xylorhiza tortifolia (Torr. & A. Gray) Greene var. tortifolia Native XYTOT

  Mojave woodyaster · Asteraceae 6 counties
• 
  Yabea microcarpa (Hook. & Arn.) Koso-Pol. Native YAMI

  false carrot · Apiaceae 43 counties
• 
  Yucca baccata Torr. Native YUBA

  banana yucca · Agavaceae 3 counties
• 
  Yucca brevifolia Engelm. Native YUBR

  Joshua tree · Agavaceae 6 counties
• 
  Yucca brevifolia Engelm. var. jaegeriana McKelvey Native YUBRJ

  Jaeger's Joshua tree · Agavaceae 1 county
• 
  Yucca schidigera Roezl ex Ortgies Native YUSC2

  Mojave yucca · Agavaceae 5 counties
• 
  Zannichellia palustris L. Native ZAPA

  horned pondweed · Zannichelliaceae 35 counties
• 
  Zigadenus brevibracteatus (M.E. Jones) H.M. Hall Native ZIBR

  desert deathcamas · Liliaceae 8 counties
• 
  Zigadenus exaltatus Eastw. Native ZIEX

  giant deathcamas · Liliaceae 10 counties
• 
  Zigadenus fremontii (Torr.) Torr. ex S. Watson Native ZIFR

  Fremont's deathcamas · Liliaceae 33 counties
• 
  Zigadenus micranthus Eastw. Native ZIMI2

  smallflower deathcamas · Liliaceae 18 counties
• 
  Zigadenus micranthus Eastw. var. fontanus (Eastw.) O.S. Walsh ex McNeal Native ZIMIF2

  smallflower deathcamas · Liliaceae 11 counties
• 
  Zigadenus micranthus Eastw. var. micranthus Native ZIMIM

  smallflower deathcamas · Liliaceae 10 counties
• 
  Zigadenus paniculatus (Nutt.) S. Watson Native ZIPA2

  foothill deathcamas · Liliaceae 20 counties
• 
  Zigadenus venenosus S. Watson Native ZIVE

  meadow deathcamas · Liliaceae 37 counties
• 
  Zigadenus venenosus S. Watson var. venenosus Native ZIVEV

  meadow deathcamas · Liliaceae 37 counties
• 
  Zizania palustris L. Native ZIPA3

  northern wildrice · Poaceae 1 county
• 
  Zizania palustris L. var. interior (Fassett) Dore Native ZIPAI

  northern wildrice · Poaceae 1 county
• 
  Ziziphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray Native ZIOB

  lotebush · Rhamnaceae 3 counties
• 
  Ziziphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray var. canescens (A. Gray) M.C. Johnst. Native ZIOBC

  lotebush · Rhamnaceae 3 counties
• 
  Ziziphus parryi Torr. Native ZIPA

  Parry's jujube · Rhamnaceae 5 counties
• 
  Zostera marina L. Native ZOMA

  seawrack · Zosteraceae 11 counties
• ⚘
  ×Elyhordeum macounii (Vasey) Barkworth & D.R. Dewey [Elymus trachycaulus × Hordeum jubatum] Native ELMA8

  Macoun's barley · Poaceae 10 counties
• ⚘
  ×Elyleymus aristatus (Merr.) Barkworth & D.R. Dewey [Elymus elymoides × Leymus triticoides] Native ELAR6

  purple wildrye · Poaceae 3 counties
• ⚘
  ×Pseudelymus saxicola (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [Elymus elymoides × Pseudoroegneria spicata] Native PSSA2

  foxtail wheatgrass · Poaceae 3 counties