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 3,851–3,900 of 3,901.

• 
  Vitis cinerea (Engelm.) Engelm. ex Millard Native VICI2

  graybark grape · Vitaceae 5 counties
• 
  Vitis cinerea (Engelm.) Engelm. ex Millard var. baileyana (Munson) Comeaux Native VICIB

  graybark grape · Vitaceae 5 counties
• 
  Vitis labrusca L. Native VILA8

  fox grape · Vitaceae 51 counties
• 
  Vitis riparia Michx. Native VIRI

  riverbank grape · Vitaceae 45 counties
• 
  Vitis rupestris Scheele Native VIRU2

  sand grape · Vitaceae 2 counties
• 
  Vitis vinifera L. Introduced VIVI5

  wine grape · Vitaceae 5 counties
• 
  Vitis vulpina L. Native VIVU

  frost grape · Vitaceae 42 counties
• ⚘
  Vitis ×novae-angliae Fernald (pro sp.) [labrusca × riparia] Native VINO2

  pilgrim grape · Vitaceae 4 counties
• 
  Vittaria appalachiana Farrar & Mickel Native VIAP2

  Appalachian shoestring fern · Vittariaceae 18 counties
• 
  Vulpia ciliata Dumort. Introduced VUCI

  fringed fescue · Poaceae 1 county
• 
  Vulpia myuros (L.) C.C. Gmel. Introduced VUMY

  Poaceae 5 counties
• 
  Vulpia octoflora (Walter) Rydb. Native VUOC

  sixweeks fescue · Poaceae 28 counties
• 
  Vulpia octoflora (Walter) Rydb. var. glauca (Nutt.) Fernald Native VUOCG

  sixweeks fescue · Poaceae 28 counties
• 
  Waldsteinia fragarioides (Michx.) Tratt. Native WAFR

  Appalachian barren strawberry · Rosaceae 57 counties
• 
  Waldsteinia fragarioides (Michx.) Tratt. ssp. fragarioides Native WAFRF

  Appalachian barren strawberry · Rosaceae 1 county
• 
  Weigela florida (Bunge) A. DC. Introduced WEFL2

  oldfashioned weigela · Caprifoliaceae 1 county
• 
  Wisteria floribunda (Willd.) DC. Introduced WIFL

  Japanese wisteria · Fabaceae 5 counties
• 
  Wisteria frutescens (L.) Poir. Native WIFR

  American wisteria · Fabaceae 7 counties
• 
  Wisteria sinensis (Sims) DC. Introduced WISI

  Chinese wisteria · Fabaceae 8 counties
• 
  Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi Native WOBO

  northern watermeal · Lemnaceae 5 counties
• 
  Wolffia brasiliensis Weddell Native WOBR

  Brazilian watermeal · Lemnaceae 13 counties
• 
  Wolffia columbiana Karst. Native WOCO

  Columbian watermeal · Lemnaceae 24 counties
• 
  Wolffiella gladiata (Hegelm.) Hegelm. Native WOGL2

  Florida mudmidget · Lemnaceae 2 counties
• 
  Woodsia ilvensis (L.) R. Br. Native WOIL

  rusty woodsia · Dryopteridaceae 28 counties
• 
  Woodsia obtusa (Spreng.) Torr. Native WOOB2

  bluntlobe cliff fern · Dryopteridaceae 54 counties
• 
  Woodsia obtusa (Spreng.) Torr. ssp. obtusa Native WOOBO

  bluntlobe cliff fern · Dryopteridaceae 53 counties
• 
  Woodwardia areolata (L.) T. Moore Native WOAR

  netted chainfern · Blechnaceae 15 counties
• 
  Woodwardia virginica (L.) Sm. Native WOVI

  Virginia chainfern · Blechnaceae 24 counties
• 
  Xanthium spinosum L. Introduced XASP2

  spiny cocklebur · Asteraceae 3 counties
• 
  Xanthium strumarium L. Native XAST

  rough cocklebur · Asteraceae 55 counties
• 
  Xanthium strumarium L. var. canadense (Mill.) Torr. & A. Gray Native XASTC

  Canada cocklebur · Asteraceae 45 counties
• 
  Xanthium strumarium L. var. glabratum (DC.) Cronquist Native XASTG

  rough cocklebur · Asteraceae 43 counties
• 
  Xanthorhiza simplicissima Marshall Native XASI

  yellowroot · Ranunculaceae 1 county
• 
  Xyris caroliniana Walter Native XYCA

  Carolina yelloweyed grass · Xyridaceae 1 county
• 
  Xyris difformis Chapm. Native XYDI

  bog yelloweyed grass · Xyridaceae 14 counties
• 
  Xyris difformis Chapm. var. difformis Native XYDID

  bog yelloweyed grass · Xyridaceae 13 counties
• 
  Xyris montana Ries Native XYMO

  northern yelloweyed grass · Xyridaceae 6 counties
• 
  Xyris torta Sm. Native XYTO

  slender yelloweyed grass · Xyridaceae 11 counties
• 
  Yucca filamentosa L. Native YUFI

  Adam's needle · Agavaceae 12 counties
• 
  Zannichellia palustris L. Native ZAPA

  horned pondweed · Zannichelliaceae 15 counties
• 
  Zanthoxylum americanum Mill. Native ZAAM

  common pricklyash · Rutaceae 25 counties
• 
  Zea mays L. Introduced ZEMA

  corn · Poaceae 24 counties
• 
  Zea mays L. ssp. mays Introduced ZEMAM2

  corn · Poaceae 23 counties
• 
  Zinnia violacea Cav. Introduced ZIVI2

  elegant zinnia · Asteraceae 6 counties
• 
  Zizania aquatica L. Native ZIAQ

  annual wildrice · Poaceae 8 counties
• 
  Zizania aquatica L. var. aquatica Native ZIAQA2

  annual wildrice · Poaceae 8 counties
• 
  Zizania palustris L. Native ZIPA3

  northern wildrice · Poaceae 1 county
• 
  Zizania palustris L. var. palustris Native ZIPAP

  northern wildrice · Poaceae 1 county
• 
  Zizia aptera (A. Gray) Fernald Native ZIAP

  meadow zizia · Apiaceae 43 counties
• 
  Zizia aurea (L.) W.D.J. Koch Native ZIAU

  golden zizia · Apiaceae 57 counties