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 301–350 of 781 (introduced).

• 
  Hainardia cylindrica (Willd.) Greuter Introduced HACY

  barbgrass · Poaceae 1 county
• 
  Hedera helix L. Introduced HEHE

  English ivy · Araliaceae 26 counties
• 
  Hedychium coronarium J. Koenig Introduced HECO11

  white garland-lily · Zingiberaceae 5 counties
• 
  Hedypnois cretica (L.) Dum. Cours. Introduced HECR2

  Cretanweed · Asteraceae 1 county
• 
  Heliotropium amplexicaule Vahl Introduced HEAM4

  clasping heliotrope · Boraginaceae 3 counties
• 
  Heliotropium indicum L. Introduced HEIN

  Indian heliotrope · Boraginaceae 63 counties
• 
  Hemerocallis fulva (L.) L. Introduced HEFU

  orange daylily · Liliaceae 25 counties
• 
  Hemigraphis reptans (G. Forst.) T. Anderson ex Hemsl. Introduced HERE6

  redflame · Acanthaceae 1 county
• 
  Hibiscus mutabilis L. Introduced HIMU3

  Dixie rosemallow · Malvaceae 2 counties
• 
  Hibiscus syriacus L. Introduced HISY

  rose of Sharon · Malvaceae 25 counties
• 
  Hibiscus trionum L. Introduced HITR

  flower of an hour · Malvaceae 4 counties
• 
  Holcus lanatus L. Introduced HOLA

  common velvetgrass · Poaceae 10 counties
• 
  Hordeum vulgare L. Introduced HOVU

  common barley · Poaceae 13 counties
• 
  Houttuynia cordata Thunb. Introduced HOCO3

  chameleon · Saururaceae 1 county
• 
  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 bowlesioides Mathias & Constance Introduced HYBO3

  largeleaf marshpennywort · Apiaceae 1 county
• 
  Hydrocotyle sibthorpioides Lam. Introduced HYSI

  lawn marshpennywort · Apiaceae 4 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
• 
  Hypericum perforatum L. Introduced HYPE

  common St. Johnswort · Clusiaceae 2 counties
• 
  Hypochaeris brasiliensis (Less.) Benth. & Hook. ex Griseb. Introduced HYBR5

  Brazilian cat's ear · Asteraceae 6 counties
• 
  Hypochaeris brasiliensis (Less.) Benth. & Hook. ex Griseb. var. tweediei (Hook. & Arn.) Baker Introduced HYBRT2

  Tweedy's cat's ear · Asteraceae 6 counties
• 
  Hypochaeris glabra L. Introduced HYGL2

  smooth cat's ear · Asteraceae 17 counties
• 
  Hypochaeris microcephala (Sch. Bip.) Cabrera Introduced HYMI5

  smallhead cat's ear · Asteraceae 15 counties
• 
  Hypochaeris microcephala (Sch. Bip.) Cabrera var. albiflora (Kuntze) Cabrera Introduced HYMIA

  smallhead cat's ear · Asteraceae 15 counties
• 
  Hypochaeris radicata L. Introduced HYRA3

  hairy cat's ear · Asteraceae 17 counties
• 
  Hyptis mutabilis (A. Rich.) Briq. Introduced HYMU2

  tropical bushmint · Lamiaceae 3 counties
• 
  Ilex crenata Thunb. Introduced ILCR2

  Japanese holly · Aquifoliaceae 1 county
• 
  Impatiens balsamina L. Introduced IMBA

  spotted snapweed · Balsaminaceae 2 counties
• 
  Imperata brasiliensis Trin. Introduced IMBR

  Brazilian satintail · Poaceae 6 counties
• 
  Imperata cylindrica (L.) P. Beauv. Introduced IMCY

  cogongrass · Poaceae 1 county
• 
  Ipomoea batatas (L.) Lam. Introduced IPBA2

  sweetpotato · Convolvulaceae 10 counties
• 
  Ipomoea cairica (L.) Sweet Introduced IPCA

  mile a minute vine · Convolvulaceae 2 counties
• 
  Ipomoea coccinea L. Introduced IPCO3

  redstar · Convolvulaceae 30 counties
• 
  Ipomoea hederacea Jacq. Introduced IPHE

  ivyleaf morning-glory · Convolvulaceae 53 counties
• 
  Ipomoea indica (Burm. f.) Merr. Introduced IPIN

  oceanblue morning-glory · Convolvulaceae 11 counties
• 
  Ipomoea purpurea (L.) Roth Introduced IPPU2

  tall morning-glory · Convolvulaceae 23 counties
• 
  Ipomoea quamoclit L. Introduced IPQU

  cypressvine · Convolvulaceae 28 counties
• 
  Ipomoea turbinata Lag. Introduced IPTU3

  lilacbell · Convolvulaceae 15 counties
• 
  Ipomoea wrightii A. Gray Introduced IPWR

  Wright's morning-glory · Convolvulaceae 24 counties
• ⚘
  Iris germanica L. Introduced IRGE

  German iris · Iridaceae 17 counties
• 
  Iris pallida Lam. Introduced IRPA2

  sweet iris · Iridaceae 1 county
• 
  Iris pseudacorus L. Introduced IRPS

  paleyellow iris · Iridaceae 14 counties
• 
  Iris xiphium L. Introduced IRXI

  Spanish iris · Iridaceae 3 counties
• 
  Jaborosa integrifolia Lam. Introduced JAIN2

  springblossom · Solanaceae 1 county
• 
  Jasminum mesnyi Hance Introduced JAME

  Japanese jasmine · Oleaceae 11 counties
• 
  Juncus capitatus Weigel Introduced JUCA5

  leafybract dwarf rush · Juncaceae 13 counties
• 
  Kickxia elatine (L.) Dumort. Introduced KIEL

  sharpleaf cancerwort · Scrophulariaceae 1 county
• 
  Koelreuteria elegans (Seem.) A.C. Sm. Introduced KOEL

  flamegold · Sapindaceae 5 counties