Louisiana

• Acadia 22001
  964 taxa Open ↗
• Allen 22003
  1,426 taxa Open ↗
• Ascension 22005
  551 taxa Open ↗
• Assumption 22007
  456 taxa Open ↗
• Avoyelles 22009
  803 taxa Open ↗
• Beauregard 22011
  1,018 taxa Open ↗
• Bienville 22013
  1,400 taxa Open ↗
• Bossier 22015
  1,395 taxa Open ↗
• Caddo 22017
  1,796 taxa Open ↗
• Calcasieu 22019
  1,531 taxa Open ↗

Showing 1,551–1,600 of 3,739.

• 
  Houstonia rosea (Raf.) Terrell Native HORO

  rose bluet · Rubiaceae 31 counties
• 
  Houttuynia cordata Thunb. Introduced HOCO3

  chameleon · Saururaceae 1 county
• 
  Hydrangea arborescens L. Native HYAR

  wild hydrangea · Hydrangeaceae 7 counties
• 
  Hydrangea quercifolia W. Bartram Native HYQU3

  oakleaf hydrangea · Hydrangeaceae 17 counties
• 
  Hydrilla verticillata (L. f.) Royle Introduced HYVE3

  waterthyme · Hydrocharitaceae 12 counties
• 
  Hydrocleys nymphoides (Humb. & Bonpl. ex Willd.) Buchenau Introduced HYNY

  waterpoppy · Limnocharitaceae 1 county
• 
  Hydrocotyle bonariensis Comm. ex Lam. Native HYBO

  largeleaf pennywort · Apiaceae 13 counties
• 
  Hydrocotyle bowlesioides Mathias & Constance Introduced HYBO3

  largeleaf marshpennywort · Apiaceae 1 county
• 
  Hydrocotyle ranunculoides L. f. Native HYRA

  floating marshpennywort · Apiaceae 38 counties
• 
  Hydrocotyle sibthorpioides Lam. Introduced HYSI

  lawn marshpennywort · Apiaceae 4 counties
• 
  Hydrocotyle umbellata L. Native HYUM

  manyflower marshpennywort · Apiaceae 41 counties
• 
  Hydrocotyle verticillata Thunb. Native HYVE2

  whorled marshpennywort · Apiaceae 62 counties
• 
  Hydrocotyle verticillata Thunb. var. verticillata Native HYVEV

  whorled marshpennywort · Apiaceae 62 counties
• 
  Hydrolea ovata Nutt. ex Choisy Native HYOV

  ovate false fiddleleaf · Hydrophyllaceae 38 counties
• 
  Hydrolea quadrivalvis Walter Native HYQU

  waterpod · Hydrophyllaceae 7 counties
• 
  Hydrolea uniflora Raf. Native HYUN

  oneflower false fiddleleaf · Hydrophyllaceae 52 counties
• 
  Hygrophila lacustris (Schltdl. & Cham.) Nees Native HYLA

  gulf swampweed · Acanthaceae 29 counties
• 
  Hylotelephium erythrostictum (Miq.) H. Ohba Introduced HYER3

  garden stonecrop · Crassulaceae 1 county
• 
  Hylotelephium spectabile (Boreau) H. Ohba Introduced HYSP9

  showy stonecrop · Crassulaceae 1 county
• 
  Hylotelephium telephioides (Michx.) H. Ohba Native HYTE9

  Allegheny stonecrop · Crassulaceae 2 counties
• 
  Hymenocallis liriosme (Raf.) Shinners Native HYLI

  spring spiderlily · Liliaceae 30 counties
• 
  Hymenocallis occidentalis (Leconte) Kunth Native HYOC2

  northern spiderlily · Liliaceae 1 county
• 
  Hymenocallis occidentalis (Leconte) Kunth var. occidentalis Native HYOCO

  northern spiderlily · Liliaceae 1 county
• 
  Hymenopappus artemisiifolius DC. Native HYAR3

  oldplainsman · Asteraceae 14 counties
• 
  Hymenopappus artemisiifolius DC. var. artemisiifolius Native HYARA

  oldplainsman · Asteraceae 14 counties
• 
  Hymenopappus scabiosaeus L'Hér. Native HYSC

  Carolina woollywhite · Asteraceae 9 counties
• 
  Hymenopappus scabiosaeus L'Hér. var. scabiosaeus Native HYSCS

  Carolina woollywhite · Asteraceae 9 counties
• 
  Hypericum brachyphyllum (Spach) Steud. Native HYBR3

  coastal plain St. Johnswort · Clusiaceae 5 counties
• 
  Hypericum cistifolium Lam. Native HYCI

  roundpod St. Johnswort · Clusiaceae 9 counties
• 
  Hypericum crux-andreae (L.) Crantz Native HYCR3

  St. Peterswort · Clusiaceae 36 counties
• 
  Hypericum densiflorum Pursh Native HYDE

  bushy St. Johnswort · Clusiaceae 28 counties
• 
  Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray Native HYDR

  nits and lice · Clusiaceae 48 counties
• 
  Hypericum fasciculatum Lam. Native HYFA

  peelbark St. Johnswort · Clusiaceae 13 counties
• 
  Hypericum frondosum Michx. Native HYFR

  cedarglade St. Johnswort · Clusiaceae 15 counties
• 
  Hypericum galioides Lam. Native HYGA

  bedstraw St. Johnswort · Clusiaceae 18 counties
• 
  Hypericum gentianoides (L.) Britton, Sterns & Poggenb. Native HYGE

  orangegrass · Clusiaceae 27 counties
• 
  Hypericum gymnanthum Engelm. & A. Gray Native HYGY

  claspingleaf St. Johnswort · Clusiaceae 29 counties
• 
  Hypericum hypericoides (L.) Crantz Native HYHY

  St. Andrew's cross · Clusiaceae 58 counties
• 
  Hypericum hypericoides (L.) Crantz ssp. hypericoides Native HYHYH

  St. Andrew's cross · Clusiaceae 58 counties
• 
  Hypericum hypericoides (L.) Crantz ssp. multicaule (Michx. ex Willd.) N. Robson Native HYHYM

  St. Andrew's cross · Clusiaceae 6 counties
• 
  Hypericum lobocarpum Gattinger ex J.M. Coult. Native HYLO2

  fivelobe St. Johnswort · Clusiaceae 13 counties
• 
  Hypericum mutilum L. Native HYMU

  dwarf St. Johnswort · Clusiaceae 51 counties
• 
  Hypericum nudiflorum Michx. ex Willd. Native HYNU

  early St. Johnswort · Clusiaceae 30 counties
• 
  Hypericum perforatum L. Introduced HYPE

  common St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum prolificum L. Native HYPR

  shrubby St. Johnswort · Clusiaceae 16 counties
• 
  Hypericum pseudomaculatum Bush Native HYPS

  false spotted St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum punctatum Lam. Native HYPU

  spotted St. Johnswort · Clusiaceae 36 counties
• 
  Hypericum setosum L. Native HYSE

  hairy St. Johnswort · Clusiaceae 16 counties
• 
  Hypericum sphaerocarpum Michx. Native HYSP2

  roundseed St. Johnswort · Clusiaceae 1 county
• 
  Hypericum suffruticosum P. Adams & N. Robson Native HYSU2

  pineland St. Johnswort · Clusiaceae 1 county