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 1,201–1,250 of 2,748 (native).

• 
  Helianthemum canadense (L.) Michx. Native HECA3

  longbranch frostweed · Cistaceae 26 counties
• 
  Helianthemum propinquum E.P. Bicknell Native HEPR

  low frostweed · Cistaceae 15 counties
• 
  Helianthus angustifolius L. Native HEAN2

  swamp sunflower · Asteraceae 1 county
• 
  Helianthus annuus L. Native HEAN3

  common sunflower · Asteraceae 20 counties
• 
  Helianthus debilis Nutt. Native HEDE4

  cucumberleaf sunflower · Asteraceae 2 counties
• 
  Helianthus debilis Nutt. ssp. cucumerifolius (Torr. & A. Gray) Heiser Native HEDEC2

  cucumberleaf sunflower · Asteraceae 2 counties
• 
  Helianthus decapetalus L. Native HEDE

  thinleaf sunflower · Asteraceae 65 counties
• 
  Helianthus divaricatus L. Native HEDI2

  woodland sunflower · Asteraceae 60 counties
• 
  Helianthus giganteus L. Native HEGI

  giant sunflower · Asteraceae 39 counties
• 
  Helianthus grosseserratus M. Martens Native HEGR4

  sawtooth sunflower · Asteraceae 15 counties
• 
  Helianthus hirsutus Raf. Native HEHI2

  hairy sunflower · Asteraceae 6 counties
• 
  Helianthus maximiliani Schrad. Native HEMA2

  Maximilian sunflower · Asteraceae 3 counties
• 
  Helianthus microcephalus Torr. & A. Gray Native HEMI3

  small woodland sunflower · Asteraceae 17 counties
• 
  Helianthus mollis Lam. Native HEMO2

  ashy sunflower · Asteraceae 7 counties
• 
  Helianthus occidentalis Riddell Native HEOC2

  fewleaf sunflower · Asteraceae 1 county
• 
  Helianthus occidentalis Riddell ssp. occidentalis Native HEOCO

  fewleaf sunflower · Asteraceae 1 county
• 
  Helianthus petiolaris Nutt. Native HEPE

  prairie sunflower · Asteraceae 6 counties
• 
  Helianthus petiolaris Nutt. ssp. petiolaris Native HEPEP

  prairie sunflower · Asteraceae 6 counties
• 
  Helianthus strumosus L. Native HEST

  paleleaf woodland sunflower · Asteraceae 56 counties
• 
  Helianthus tuberosus L. Native HETU

  Jerusalem artichoke · Asteraceae 56 counties
• ⚘
  Helianthus ×laetiflorus Pers. (pro sp.) [pauciflorus × tuberosus] Native HELA

  cheerful sunflower · Asteraceae 20 counties
• 
  Heliopsis helianthoides (L.) Sweet Native HEHE5

  smooth oxeye · Asteraceae 60 counties
• 
  Heliopsis helianthoides (L.) Sweet var. helianthoides Native HEHEH

  smooth oxeye · Asteraceae 60 counties
• 
  Heliotropium curassavicum L. Native HECU3

  salt heliotrope · Boraginaceae 1 county
• 
  Heliotropium curassavicum L. var. curassavicum Native HECUC2

  salt heliotrope · Boraginaceae 1 county
• 
  Hepatica nobilis Schreb. Native HENO2

  hepatica · Ranunculaceae 67 counties
• 
  Hepatica nobilis Schreb. var. acuta (Pursh) Steyerm. Native HENOA

  sharplobe hepatica · Ranunculaceae 39 counties
• 
  Hepatica nobilis Schreb. var. obtusa (Pursh) Steyerm. Native HENOO

  roundlobe hepatica · Ranunculaceae 63 counties
• 
  Heracleum maximum W. Bartram Native HEMA80

  common cowparsnip · Apiaceae 38 counties
• 
  Hesperostipa spartea (Trin.) Barkworth Native HESP11

  porcupinegrass · Poaceae 1 county
• 
  Heteranthera dubia (Jacq.) MacMill. Native HEDU2

  grassleaf mudplantain · Pontederiaceae 42 counties
• 
  Heteranthera multiflora (Griseb.) Horn Native HEMU5

  bouquet mudplantain · Pontederiaceae 3 counties
• 
  Heteranthera reniformis Ruiz & Pav. Native HERE

  kidneyleaf mudplantain · Pontederiaceae 16 counties
• 
  Heterotheca subaxillaris (Lam.) Britton & Rusby Native HESU3

  camphorweed · Asteraceae 3 counties
• 
  Heuchera americana L. Native HEAM6

  American alumroot · Saxifragaceae 46 counties
• 
  Heuchera americana L. var. americana Native HEAMA2

  American alumroot · Saxifragaceae 46 counties
• 
  Heuchera pubescens Pursh Native HEPU7

  downy alumroot · Saxifragaceae 24 counties
• 
  Heuchera sanguinea Engelm. Native HESA3

  coralbells · Saxifragaceae 1 county
• 
  Heuchera sanguinea Engelm. var. sanguinea Native HESAS

  coralbells · Saxifragaceae 1 county
• 
  Hibiscus laevis All. Native HILA2

  halberdleaf rosemallow · Malvaceae 6 counties
• 
  Hibiscus moscheutos L. Native HIMO

  crimsoneyed rosemallow · Malvaceae 12 counties
• ⚘
  Hieracium greenii Porter & Britton Native HIGR5

  Maryland hawkweed · Asteraceae 4 counties
• 
  Hieracium gronovii L. Native HIGR3

  queendevil · Asteraceae 23 counties
• ⚘
  Hieracium kalmii L. Native HIKA2

  Kalm's hawkweed · Asteraceae 15 counties
• 
  Hieracium paniculatum L. Native HIPA2

  Allegheny hawkweed · Asteraceae 64 counties
• 
  Hieracium scabrum Michx. Native HISC

  rough hawkweed · Asteraceae 65 counties
• 
  Hieracium scabrum Michx. var. scabrum Native HISCS

  rough hawkweed · Asteraceae 65 counties
• 
  Hieracium venosum L. Native HIVE

  rattlesnakeweed · Asteraceae 60 counties
• 
  Hierochloe hirta (Schrank) Borbás Native HIHI

  northern sweetgrass · Poaceae 4 counties
• 
  Hierochloe hirta (Schrank) Borbás ssp. arctica (J. Presl) G. Weim. Native HIHIA

  northern sweetgrass · Poaceae 4 counties