Cat Greenbrier
Smilax glauca
Found in dry forests and woodlands; moist forests; forests and woodlands; floodplain and bottomland forests; hardwood and oak flatwoods; pine flatwoods; prairies and grasslands; roadsides, fields and disturbed ground. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you
Native to Virginia. How scores work Is it native here?
Profile 100%
- Height
- About 1 foot
- Light
- Dappled sunlight, Full sun, Partial shade
- Soil moisture
- Somewhat dry to moist
At a glance
- Life cycle
- Woody perennial
- Leaves
- Deciduous or semi-evergreen
- Bloom
- April and June
- Fruiting season
- Spring to fall
Not yet recorded · Spread
Recorded in 96 Virginia counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Forests and open woodlands on dry ridges and slopes, often oak or pine.
Forest or woodland where the source does not say how moist or dry.
Floodplain and bottomland forests
Forests on low ground beside rivers and streams that flood from time to time.
Flat, poorly drained uplands and terraces with oaks, sweetgum and sometimes loblolly pine, wet in winter and dry in summer, but neither a floodplain nor a swamp.
Roadsides, fields and disturbed ground
Ground opened by people: roadsides, old fields, pastures, fencerows and lots.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 119 animals.
- Blue-headed VireoVireo solitarius
- Blue-winged WarblerVermivora pinus
- Brown-headed CowbirdMolothrus ater
- Chimney SwiftChaetura pelagica
- Common YellowthroatGeothlypis trichas
- Field SparrowSpizella pusilla
- Golden-winged WarblerVermivora chrysoptera
- Great EgretArdea alba
- Indigo BuntingPasserina cyanea
- Loggerhead ShrikeLanius ludovicianus
- Northern Rough-winged SwallowStelgidopteryx serripennis
- Northern Saw-whet OwlAegolius acadicus
- Red CrossbillLoxia curvirostra
- Red-breasted NuthatchSitta canadensis
- Red-cockaded WoodpeckerPicoides borealis
- Rose-breasted GrosbeakPheucticus ludovicianus
- Rusty BlackbirdEuphagus carolinus
- Song SparrowMelospiza melodia
- Tree SwallowTachycineta bicolor
- VeeryCatharus fuscescens
- White IbisEudocimus albus
- White-breasted NuthatchSitta carolinensis
- Yellow-crowned Night-heronNyctanassa violacea
Who uses this plant?
22CaterpillarsGenus host records with ranges including VA
Genus host records with ranges including VA · Smilax
- Acrolepiopsis incertellaCarrionflower Moth
- Amphipyra pyramidoidesMiranda Underwing, Copper Underwing, Copper Amphipyra
- Callopistria floridensisFlorida Fern Caterpillar
- Choristoneura parallelaParallel-Banded Leafroller, Spotted Fireworm Moth
- Cymatophora approximariaLarge Scalloped-Wing, Giant Grey
- Ephestiodes infimellaReddish Ephestiodes
- Eutrapela clematariaCurved-Tooth Geometer, Purplish Brown Looper
- Feniseca tarquiniusHarvester
- Lithophane viridipallensPale Green Pinion
- Norape cretataWhite Flannel Moth
Show all 22
- Oiketicus abbotiiAbbot's Bagworm Moth
- Orthosia rubescensRuby Quaker
- Papaipema unimodaMeadow Rue Borer, Chain Fern Border Moth
- Phosphila miselioidesSpotted Phosphila
- Phosphila turbulentaTurbulent Phosphila
- Phyprosopus callitrichoidesCurved-Line Owlet
- Proleucoptera smilaciellaGreenbrier Leafminer
- Pseudogalleria inimicellaInimical Borer
- Pseudothyris sepulchralisMournful Thyris
- Thyridopteryx ephemeraeformisEvergreen Bagworm Moth
- Trichoplusia niNi Moth, Cabbage Looper Moth
- Acrolepiopsis heppneri
10BeesSoutheastern regional records
Southeastern regional records · Smilax
Individual names are not available yet.
Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
11BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Smilax
- Bonasa umbellusRuffed Grouse
- Cardinalis cardinalisNorthern Cardinal
- Catharus fuscescensVeery
- Catharus guttatusHermit Thrush
- Catharus minimus/bicknelliGray-cheeked/Bicknell's Thrush
- Catharus ustulatusSwainson's Thrush
- Meleagris gallopavoWild Turkey
- Pinicola enucleatorPine Grosbeak
- Sialia sialisEastern Bluebird
- Turdus migratoriusAmerican Robin
Show all 11
- Vireo solitariusBlue-headed Vireo
Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Plant details
- Family
- Smilacaceae
- Hardiness
- Zones 4b–10b
- Soil pH
- Acidic to alkaline
- Flower color
- Yellow or green
- Growth rate
- Rapid
- Growth habit
- Forms thickets
- Foliage color
- Gray-green
- Fruit begins
- Spring
- Fruit ends
- Fall
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “Late April to early June” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Yellow or green” · NC Extension Plant Toolbox (ranked first; USDA PLANTS differs)
- Foliage color · “Gray-green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “Spring” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit ends · “Fall” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth habit · “Forms thickets” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Rapid” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Hardiness · “Zones 4b–10b” · NC Extension Plant Toolbox
- Height · “About 1 foot” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Leaves · “Deciduous or semi-evergreen” · NC Extension Plant Toolbox
- Life cycle · “Woody perennial” · NC Extension Plant Toolbox
- Light · “Dappled sunlight (shade through upper canopy all day); Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox
- Soil · “Moist; Occasionally dry” · NC Extension Plant Toolbox
- Soil pH · “Acidic to alkaline” · NC Extension Plant Toolbox
Also known as
Cat Sawbrier
Conservation status
| Virginia rank | S5 |
|---|---|
| Global rank | G5 |
| VA status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Growing cautions
- Suckers and forms colonies. USDA PLANTS lists its growth form as thicket forming. USDA PLANTS
For planning only; these do not change the score or Fit.
Sources
- Digital Atlas of the Virginia Flora
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Northern Tier edition
- NatureServe Explorer
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications