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 4,351–4,400 of 8,499 (native).

• 
  Iris munzii R.C. Foster Native IRMU

  Munz's iris · Iridaceae 1 county
• 
  Iris purdyi Eastw. Native IRPU

  Purdy's iris · Iridaceae 4 counties
• 
  Iris tenax Douglas ex Lindl. Native IRTE

  toughleaf iris · Iridaceae 2 counties
• 
  Iris tenax Douglas ex Lindl. ssp. klamathensis Lenz Native IRTEK2

  Klamath iris · Iridaceae 2 counties
• 
  Iris tenuissima Dykes Native IRTE3

  longtube iris · Iridaceae 13 counties
• 
  Iris tenuissima Dykes ssp. purdyiformis (R.C. Foster) Lenz Native IRTEP

  longtube iris · Iridaceae 5 counties
• 
  Iris tenuissima Dykes ssp. tenuissima Native IRTET2

  longtube iris · Iridaceae 7 counties
• ⚘
  Iris thompsonii R.C. Foster Native IRTH

  Thompson's iris · Iridaceae 2 counties
• 
  Isocoma acradenia (Greene) Greene Native ISAC2

  alkali goldenbush · Asteraceae 16 counties
• 
  Isocoma acradenia (Greene) Greene var. acradenia Native ISACA2

  alkali goldenbush · Asteraceae 8 counties
• 
  Isocoma acradenia (Greene) Greene var. bracteosa (Greene) G.L. Nesom Native ISACB

  alkali goldenbush · Asteraceae 10 counties
• 
  Isocoma acradenia (Greene) Greene var. eremophila (Greene) G.L. Nesom Native ISACE2

  alkali goldenbush · Asteraceae 7 counties
• 
  Isocoma arguta Greene Native ISAR2

  Carquinez goldenbush · Asteraceae 2 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom Native ISME5

  Menzies' goldenbush · Asteraceae 19 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom var. decumbens (Greene) G.L. Nesom Native ISMED

  Menzies' goldenbush · Asteraceae 3 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom var. diabolica G.L. Nesom Native ISMED2

  Menzies' goldenbush · Asteraceae 2 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom var. menziesii Native ISMEM

  Menzies' goldenbush · Asteraceae 17 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom var. sedoides (Greene) G.L. Nesom Native ISMES

  Menzies' goldenbush · Asteraceae 7 counties
• 
  Isocoma menziesii (Hook. & Arn.) G.L. Nesom var. vernonioides (Nutt.) G.L. Nesom Native ISMEV

  Menzies' goldenbush · Asteraceae 13 counties
• 
  Isoetes bolanderi Engelm. Native ISBO

  Bolander's quillwort · Isoetaceae 25 counties
• 
  Isoetes howellii Engelm. Native ISHO

  Howell's quillwort · Isoetaceae 33 counties
• 
  Isoetes nuttallii A. Braun ex Engelm. Native ISNU

  Nuttall's quillwort · Isoetaceae 27 counties
• 
  Isoetes occidentalis L.F. Hend. Native ISOC

  western quillwort · Isoetaceae 9 counties
• 
  Isoetes orcuttii A.A. Eaton Native ISOR

  Orcutt's quillwort · Isoetaceae 21 counties
• 
  Isoetes tenella Léman Native ISTE5

  spiny-spore quillwort · Isoetaceae 6 counties
• 
  Isolepis carinata Hook. & Arn. ex Torr. Native ISCA6

  keeled bulrush · Cyperaceae 9 counties
• 
  Isolepis cernua (Vahl) Roem. & Schult. Native ISCE

  low bulrush · Cyperaceae 25 counties
• 
  Iva axillaris Pursh Native IVAX

  povertyweed · Asteraceae 32 counties
• 
  Iva hayesiana A. Gray Native IVHA

  San Diego povertyweed · Asteraceae 1 county
• 
  Ivesia aperta (J.T. Howell) Munz Native IVAP

  Sierra Valley mousetail · Rosaceae 3 counties
• 
  Ivesia aperta (J.T. Howell) Munz var. aperta Native IVAPA

  Sierra Valley mousetail · Rosaceae 3 counties
• 
  Ivesia aperta (J.T. Howell) Munz var. canina Ertter Native IVAPC

  Sierra Valley mousetail · Rosaceae 1 county
• 
  Ivesia argyrocoma (Rydb.) Rydb. Native IVAR

  silverhair mousetail · Rosaceae 1 county
• 
  Ivesia arizonica (Eastw. ex J.T. Howell) Ertter Native IVAR2

  rock whitefeather · Rosaceae 1 county
• 
  Ivesia arizonica (Eastw. ex J.T. Howell) Ertter var. arizonica Native IVARA

  Arizona whitefeather · Rosaceae 1 county
• 
  Ivesia baileyi S. Watson Native IVBA

  Bailey's ivesia · Rosaceae 3 counties
• 
  Ivesia baileyi S. Watson var. baileyi Native IVBAB

  Bailey's ivesia · Rosaceae 2 counties
• 
  Ivesia baileyi S. Watson var. beneolens (A. Nelson & J.F. Macbr.) Ertter Native IVBAB2

  Bailey's ivesia · Rosaceae 1 county
• 
  Ivesia callida (H.M. Hall) Rydb. Native IVCA

  Tahquitz mousetail · Rosaceae 1 county
• 
  Ivesia campestris (M.E. Jones) Rydb. Native IVCA2

  field mousetail · Rosaceae 3 counties
• 
  Ivesia gordonii (Hook.) Torr. & A. Gray Native IVGO

  Gordon's ivesia · Rosaceae 19 counties
• 
  Ivesia jaegeri Munz & I.M. Johnst. Native IVJA

  Jaeger's mousetail · Rosaceae 1 county
• 
  Ivesia kingii S. Watson Native IVKI

  King's mousetail · Rosaceae 2 counties
• 
  Ivesia longibracteata Ertter Native IVLO

  longbract mousetail · Rosaceae 1 county
• 
  Ivesia lycopodioides A. Gray Native IVLY

  clubmoss mousetail · Rosaceae 9 counties
• 
  Ivesia lycopodioides A. Gray ssp. lycopodioides Native IVLYL

  clubmoss mousetail · Rosaceae 6 counties
• 
  Ivesia lycopodioides A. Gray ssp. megalopetala (Rydb.) D.D. Keck Native IVLYM

  clubmoss mousetail · Rosaceae 7 counties
• 
  Ivesia lycopodioides A. Gray ssp. scandularis (Rydb.) D.D. Keck Native IVLYS

  clubmoss mousetail · Rosaceae 2 counties
• 
  Ivesia muirii A. Gray Native IVMU

  granite mousetail · Rosaceae 5 counties
• 
  Ivesia paniculata T.W. Nelson & J.P. Nelson Native IVPA

  Ash Creek mousetail · Rosaceae 1 county