Prince William County

Showing 551–600 of 1,225.

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  Huperzia appalachiana Beitel & Mickel Native HUAP

  Appalachian clubmoss · Lycopodiaceae
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  Huperzia lucidula (Michx.) Trevis. Native HULU2

  shining clubmoss · Lycopodiaceae
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  Hybanthus concolor (T.F. Forst.) Spreng. Native HYCO6

  eastern greenviolet · Violaceae
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  Hydrangea arborescens L. Native HYAR

  wild hydrangea · Hydrangeaceae
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  Hydrocotyle americana L. Native HYAM

  American marshpennywort · Apiaceae
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  Hydrocotyle ranunculoides L. f. Native HYRA

  floating marshpennywort · Apiaceae
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  Hydrophyllum virginianum L. Native HYVI

  eastern waterleaf · Hydrophyllaceae
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  Hylotelephium telephioides (Michx.) H. Ohba Native HYTE9

  Allegheny stonecrop · Crassulaceae
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  Hypericum gentianoides (L.) Britton, Sterns & Poggenb. Native HYGE

  orangegrass · Clusiaceae
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  Hypericum hypericoides (L.) Crantz Native HYHY

  St. Andrew's cross · Clusiaceae
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  Hypericum mutilum L. Native HYMU

  dwarf St. Johnswort · Clusiaceae
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  Hypericum perforatum L. Introduced HYPE

  common St. Johnswort · Clusiaceae
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  Hypericum prolificum L. Native HYPR

  shrubby St. Johnswort · Clusiaceae
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  Hypericum punctatum Lam. Native HYPU

  spotted St. Johnswort · Clusiaceae
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  Hypoxis hirsuta (L.) Coville Native HYHI2

  common goldstar · Liliaceae
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  Ilex opaca Aiton Native ILOP

  American holly · Aquifoliaceae
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  Ilex opaca Aiton var. opaca Native ILOPO

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

  common winterberry · Aquifoliaceae
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  Impatiens capensis Meerb. Native IMCA

  jewelweed · Balsaminaceae
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  Ipomoea coccinea L. Introduced IPCO3

  redstar · Convolvulaceae
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  Ipomoea hederacea Jacq. Introduced IPHE

  ivyleaf morning-glory · Convolvulaceae
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  Ipomoea lacunosa L. Native IPLA

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

  man of the earth · Convolvulaceae
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  Ipomoea purpurea (L.) Roth Introduced IPPU2

  tall morning-glory · Convolvulaceae
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  Iris cristata Aiton Native IRCR

  dwarf crested iris · Iridaceae
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  Iris pseudacorus L. Introduced IRPS

  paleyellow iris · Iridaceae
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  Iris virginica L. Native IRVI

  Virginia iris · Iridaceae
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  Iris virginica L. var. virginica Native IRVIV

  Virginia iris · Iridaceae
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  Isatis tinctoria L. Introduced ISTI

  Dyer's woad · Brassicaceae
• ⚘
  Isoetes ×carltaylorii Musselman [acadiensis × engelmannii] Native ISCA8

  Taylor's quillwort · Isoetaceae
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  Isotria medeoloides (Pursh) Raf. Native ISME2

  small whorled pogonia · Orchidaceae
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  Isotria verticillata Raf. Native ISVE

  large whorled pogonia · Orchidaceae
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  Itea virginica L. Native ITVI

  Virginia sweetspire · Grossulariaceae
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  Juglans nigra L. Native JUNI

  black walnut · Juglandaceae
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  Juncus acuminatus Michx. Native JUAC

  tapertip rush · Juncaceae
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  Juncus bufonius L. Native JUBU

  toad rush · Juncaceae
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  Juncus bufonius L. var. bufonius Native JUBUB

  toad rush · Juncaceae
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  Juncus dichotomus Elliott Native JUDI

  forked rush · Juncaceae
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  Juncus effusus L. Native JUEF

  common rush · Juncaceae
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  Juncus marginatus Rostk. Native JUMA4

  grassleaf rush · Juncaceae
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  Juncus scirpoides Lam. Native JUSC

  needlepod rush · Juncaceae
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  Juncus secundus P. Beauv. ex Poir. Native JUSE

  lopsided rush · Juncaceae
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  Juncus subcaudatus (Engelm.) Coville & S.F. Blake Native JUSU

  woodland rush · Juncaceae
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  Juncus subcaudatus (Engelm.) Coville & S.F. Blake var. subcaudatus Native JUSUS2

  woodland rush · Juncaceae
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  Juncus tenuis Willd. Native JUTE

  poverty rush · Juncaceae
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  Juniperus virginiana L. Native JUVI

  eastern redcedar · Cupressaceae
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  Juniperus virginiana L. var. virginiana Native JUVIV

  eastern redcedar · Cupressaceae
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  Justicia americana (L.) Vahl Native JUAM

  American water-willow · Acanthaceae
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  Kalmia latifolia L. Native KALA

  mountain laurel · Ericaceae
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  Kickxia elatine (L.) Dumort. Introduced KIEL

  sharpleaf cancerwort · Scrophulariaceae