Pennsylvania

• Adams 42001
  1,101 taxa Open ↗
• Allegheny 42003
  1,943 taxa Open ↗
• Armstrong 42005
  1,126 taxa Open ↗
• Beaver 42007
  1,402 taxa Open ↗
• Bedford 42009
  1,989 taxa Open ↗
• Berks 42011
  2,115 taxa Open ↗
• Blair 42013
  1,613 taxa Open ↗
• Bradford 42015
  1,111 taxa Open ↗
• Bucks 42017
  2,298 taxa Open ↗
• Butler 42019
  1,422 taxa Open ↗

Showing 1,801–1,850 of 3,901.

• 
  Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray Native HYDR

  nits and lice · Clusiaceae 3 counties
• 
  Hypericum ellipticum Hook. Native HYEL

  pale St. Johnswort · Clusiaceae 50 counties
• 
  Hypericum gentianoides (L.) Britton, Sterns & Poggenb. Native HYGE

  orangegrass · Clusiaceae 39 counties
• 
  Hypericum gymnanthum Engelm. & A. Gray Native HYGY

  claspingleaf St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum hypericoides (L.) Crantz Native HYHY

  St. Andrew's cross · Clusiaceae 11 counties
• 
  Hypericum hypericoides (L.) Crantz ssp. multicaule (Michx. ex Willd.) N. Robson Native HYHYM

  St. Andrew's cross · Clusiaceae 11 counties
• 
  Hypericum majus (A. Gray) Britton Native HYMA2

  large St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum mutilum L. Native HYMU

  dwarf St. Johnswort · Clusiaceae 65 counties
• 
  Hypericum perforatum L. Introduced HYPE

  common St. Johnswort · Clusiaceae 67 counties
• 
  Hypericum prolificum L. Native HYPR

  shrubby St. Johnswort · Clusiaceae 47 counties
• 
  Hypericum punctatum Lam. Native HYPU

  spotted St. Johnswort · Clusiaceae 63 counties
• 
  Hypericum sphaerocarpum Michx. Native HYSP2

  roundseed St. Johnswort · Clusiaceae 1 county
• 
  Hypochaeris glabra L. Introduced HYGL2

  smooth cat's ear · Asteraceae 1 county
• 
  Hypochaeris radicata L. Introduced HYRA3

  hairy cat's ear · Asteraceae 34 counties
• 
  Hypoxis hirsuta (L.) Coville Native HYHI2

  common goldstar · Liliaceae 56 counties
• 
  Hyssopus officinalis L. Introduced HYOF

  hyssop · Lamiaceae 2 counties
• 
  Iberis umbellata L. Introduced IBUM

  globe candytuft · Brassicaceae 5 counties
• 
  Ilex glabra (L.) A. Gray Native ILGL

  inkberry · Aquifoliaceae 3 counties
• 
  Ilex laevigata (Pursh) A. Gray Native ILLA

  smooth winterberry · Aquifoliaceae 14 counties
• 
  Ilex montana Torr. & A. Gray ex A. Gray Native ILMO

  mountain holly · Aquifoliaceae 52 counties
• 
  Ilex mucronata (L.) Powell, Savolainen & Andrews Native ILMU

  catberry · Aquifoliaceae 35 counties
• 
  Ilex opaca Aiton Native ILOP

  American holly · Aquifoliaceae 16 counties
• 
  Ilex opaca Aiton var. opaca Native ILOPO

  American holly · Aquifoliaceae 16 counties
• 
  Ilex verticillata (L.) A. Gray Native ILVE

  common winterberry · Aquifoliaceae 64 counties
• 
  Impatiens balsamina L. Introduced IMBA

  spotted snapweed · Balsaminaceae 7 counties
• 
  Impatiens capensis Meerb. Native IMCA

  jewelweed · Balsaminaceae 67 counties
• 
  Impatiens pallida Nutt. Native IMPA

  pale touch-me-not · Balsaminaceae 61 counties
• 
  Inula helenium L. Introduced INHE

  elecampane inula · Asteraceae 37 counties
• 
  Iodanthus pinnatifidus (Michx.) Steud. Native IOPI

  purplerocket · Brassicaceae 5 counties
• 
  Ionactis linariifolius (L.) Greene Native IOLI2

  flaxleaf whitetop aster · Asteraceae 25 counties
• 
  Ipomoea batatas (L.) Lam. Introduced IPBA2

  sweetpotato · Convolvulaceae 6 counties
• 
  Ipomoea coccinea L. Introduced IPCO3

  redstar · Convolvulaceae 7 counties
• 
  Ipomoea hederacea Jacq. Introduced IPHE

  ivyleaf morning-glory · Convolvulaceae 22 counties
• 
  Ipomoea imperati (Vahl) Griseb. Native IPIM

  beach morning-glory · Convolvulaceae 1 county
• 
  Ipomoea lacunosa L. Native IPLA

  whitestar · Convolvulaceae 8 counties
• 
  Ipomoea pandurata (L.) G. Mey. Native IPPA

  man of the earth · Convolvulaceae 41 counties
• 
  Ipomoea pes-caprae (L.) R. Br. Native IPPE

  bayhops · Convolvulaceae 7 counties
• 
  Ipomoea pes-caprae (L.) R. Br. ssp. brasiliensis (L.) van Ooststr. Native IPPEB

  Brazilian bayhops · Convolvulaceae 7 counties
• 
  Ipomoea purpurea (L.) Roth Introduced IPPU2

  tall morning-glory · Convolvulaceae 20 counties
• 
  Ipomoea quamoclit L. Introduced IPQU

  cypressvine · Convolvulaceae 3 counties
• 
  Ipomoea tricolor Cav. Introduced IPTR3

  grannyvine · Convolvulaceae 3 counties
• 
  Iris cristata Aiton Native IRCR

  dwarf crested iris · Iridaceae 5 counties
• 
  Iris ensata Thunb. Introduced IREN

  Japanese iris · Iridaceae 2 counties
• 
  Iris flavescens Delile Introduced IRFL2

  lemonyellow iris · Iridaceae 3 counties
• ⚘
  Iris germanica L. Introduced IRGE

  German iris · Iridaceae 20 counties
• 
  Iris prismatica Pursh ex Ker Gawl. Native IRPR

  slender blue iris · Iridaceae 9 counties
• 
  Iris pseudacorus L. Introduced IRPS

  paleyellow iris · Iridaceae 24 counties
• 
  Iris sibirica L. Introduced IRSI

  Siberian iris · Iridaceae 4 counties
• 
  Iris verna L. Native IRVE

  dwarf violet iris · Iridaceae 3 counties
• 
  Iris verna L. var. smalliana Fernald ex M.E. Edwards Native IRVES

  dwarf violet iris · Iridaceae 3 counties