Willacy County

Showing 451–500 of 546.

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  Schoenoplectiella erecta (Poir.) Lye ssp. raynalii (Schuyler) Beentje Native SCERR2

  sharpscale bulrush · Cyperaceae
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  Schoenoplectiella saximontana (Fernald) Lye Native SCSA11

  Rocky Mountain bulrush · Cyperaceae
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  Schoenoplectus pungens (Vahl) Palla Native SCPU10

  common threesquare · Cyperaceae
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  Sclerocarpus uniserialis (Benth.) Hemsl. Native SCUN2

  Mexican bonebract · Asteraceae
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  Sclerocarpus uniserialis (Benth.) Hemsl. var. austrotexanus B.L. Turner Native SCUNA

  Mexican bonebract · Asteraceae
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  Scutellaria drummondii Benth. Native SCDR2

  Drummond's skullcap · Lamiaceae
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  Scutellaria drummondii Benth. var. runyonii B.L. Turner Native SCDRR

  Drummond's skullcap · Lamiaceae
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  Scutellaria muriculata Epling Native SCMU2

  Rio Grande skullcap · Lamiaceae
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  Senecio ampullaceus Hook. Native SEAM2

  Texas ragwort · Asteraceae
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  Sesbania drummondii (Rydb.) Cory Native SEDR

  poisonbean · Fabaceae
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  Sesuvium portulacastrum (L.) L. Native SEPO2

  shoreline seapurslane · Aizoaceae
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  Sesuvium portulacastrum (L.) L. var. portulacastrum Native SEPOP

  shoreline seapurslane · Aizoaceae
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  Sesuvium verrucosum Raf. Native SEVE2

  verrucose seapurslane · Aizoaceae
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  Setaria macrostachya Kunth Native SEMA5

  large-spike bristlegrass · Poaceae
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  Setaria parviflora (Poir.) Kerguélen Native SEPA10

  marsh bristlegrass · Poaceae
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  Setaria reverchonii (Vasey) Pilg. Native SERE3

  Reverchon's bristlegrass · Poaceae
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  Setaria texana W.H.P. Emery Native SETE6

  Texas bristlegrass · Poaceae
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  Sibara viereckii (O.E. Schultz) Rollins Native SIVI5

  Viereck's winged rockcress · Brassicaceae
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  Sida ciliaris L. Native SICI

  bracted fanpetals · Malvaceae
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  Sida cordifolia L. Native SICO

  ‘ilima · Malvaceae
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  Sida lindheimeri Engelm. & A. Gray Native SILI

  showy fanpetals · Malvaceae
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  Sida rhombifolia L. Native SIRH

  Cuban jute · Malvaceae
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  Sida spinosa L. Native SISP

  prickly fanpetals · Malvaceae
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  Sidastrum paniculatum (L.) Fryxell Native SIPA5

  panicled sandmallow · Malvaceae
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  Silene antirrhina L. Native SIAN2

  sleepy silene · Caryophyllaceae
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  Simsia calva (Engelm. & A. Gray) A. Gray Native SICA7

  awnless bushsunflower · Asteraceae
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  Sisyrinchium biforme E.P. Bicknell Native SIBI

  wiry blue-eyed grass · Iridaceae
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  Sisyrinchium langloisii Greene Native SILA5

  roadside blue-eyed grass · Iridaceae
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  Solanum elaeagnifolium Cav. Native SOEL

  silverleaf nightshade · Solanaceae
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  Solanum ptycanthum Dunal Native SOPT7

  West Indian nightshade · Solanaceae
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  Solanum triquetrum Cav. Native SOTR2

  Texas nightshade · Solanaceae
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  Sorghum halepense (L.) Pers. Introduced SOHA

  Johnsongrass · Poaceae
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  Spartina alterniflora Loisel. Native SPAL

  smooth cordgrass · Poaceae
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  Spartina spartinae (Trin.) Merr. ex Hitchc. Native SPSP

  gulf cordgrass · Poaceae
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  Sphaeralcea pedatifida (A. Gray) A. Gray Native SPPE2

  palmleaf globemallow · Malvaceae
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  Sporobolus airoides (Torr.) Torr. Native SPAI

  alkali sacaton · Poaceae
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  Sporobolus cryptandrus (Torr.) A. Gray Native SPCR

  sand dropseed · Poaceae
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  Sporobolus purpurascens (Sw.) Ham. Native SPPU3

  purple dropseed · Poaceae
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  Sporobolus pyramidatus (Lam.) Hitchc. Native SPPY2

  Madagascar dropseed · Poaceae
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  Sporobolus tharpii Hitchc. Native SPTH

  Tharp's dropseed · Poaceae
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  Sporobolus virginicus (L.) Kunth Native SPVI3

  seashore dropseed · Poaceae
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  Sporobolus wrightii Munro ex Scribn. Native SPWR2

  big sacaton · Poaceae
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  Stachys drummondii Benth. Native STDR

  Drummond's hedgenettle · Lamiaceae
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  Steinchisma hians (Elliott) Nash Native STHI3

  gaping grass · Poaceae
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  Stenandrium dulce (Cav.) Nees Native STDU2

  sweet shaggytuft · Acanthaceae
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  Stenandrium dulce (Cav.) Nees var. dulce Native STDUD

  sweet shaggytuft · Acanthaceae
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  Stillingia sylvatica L. Native STSY

  queen's-delight · Euphorbiaceae
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  Stillingia sylvatica L. ssp. sylvatica Native STSYS2

  queen's-delight · Euphorbiaceae
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  Stylosanthes viscosa (L.) Sw. Native STVI5

  poorman's friend · Fabaceae
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  Suaeda calceoliformis (Hook.) Moq. Native SUCA2

  Pursh seepweed · Chenopodiaceae