| Animals -
Invertebrates |
| Alasmidonta marginata (elktoe) | - | INV | G4 | S3 |
| Callophrys irus
hadros (Frosted Elfin) | - | INV | G3T2T3 | S1 |
| Cicindela macra (sandy stream tiger beetle) | - | INV | G5 | S2S3 |
| Cordulegaster talaria (Ouachita spiketail) | - | INV | G1G2 | S1 |
| Cyprogenia aberti (western fanshell) | - | INV | G2G3Q | S2 |
| Fallicambarus harpi (Ouachita burrowing crayfish) | - | INV | G2 | S2 |
| Gomphus ozarkensis (Ozark clubtail) | - | INV | G4 | S1 |
| Hesperia meskei (Meske's Skipper) | - | INV | G3G4 | S1S2 |
| Lampsilis powellii (Arkansas fatmucket) | LT | SE | G2 | S2 |
| Lampsilis satura (sandbank pocketbook) | - | INV | G2 | S2 |
| Lampsilis siliquoidea (fatmucket) | - | INV | G5 | S3 |
| Lasmigona costata (flutedshell) | - | INV | G5 | S3 |
| Ligidium elrodii (an isopod) | - | INV | G4G5 | S2 |
| Ligumia recta (black sandshell) | - | INV | G4G5 | S2 |
| Lucanus elaphus (giant stag beetle) | - | INV | G3G5 | S2 |
| Ophiogomphus westfalli (Westfall's snaketail) | - | INV | G3 | S1S2 |
| Orconectes menae (Mena crayfish) | - | INV | G3 | S3 |
| Pentacora ouachita (Ouachita shore bug) | - | INV | GNR | S1 |
| Pleurobema rubrum (pyramid pigtoe) | - | INV | G2G3 | S2 |
| Problema byssus (Byssus Skipper) | - | INV | G3G4 | S1 |
| Procambarus parasimulans (Bismark burrowing crayfish) | - | INV | G4 | S3 |
| Procambarus tenuis (Ouachita Mountain crayfish) | - | INV | G3 | S2 |
| Pseudactium magazinensis (Ouachita pseudactium) | - | INV | GNR | S1 |
| Ptychobranchus
occidentalis (Ouachita kidneyshell) | - | INV | G3G4 | S3 |
| Quadrula cylindrica
cylindrica (rabbitsfoot) | LT | SE | G3G4T3 | S2 |
| Quadrula metanevra (monkeyface) | - | INV | G4 | S3S4 |
| Speyeria diana (Diana Fritillary) | - | INV | G3G4 | S2S3 |
| Stenotrema unciferum (Ouachita slitmouth) | - | INV | G2 | SNR |
| Toxolasma lividum (purple lilliput) | - | INV | G3Q | S2 |
| Uniomerus tetralasmus (pondhorn) | - | INV | G5 | S2 |
| Villosa arkansasensis (Ouachita creekshell) | - | INV | G2 | S2 |
| Villosa iris (rainbow) | - | INV | G5Q | S2S3 |
| Villosa lienosa (little spectaclecase) | - | INV | G5 | S3 |
| Animals
- Vertebrates |
| Ambystoma annulatum (ringed salamander) | - | INV | G4 | S3 |
| Crotalus atrox (western diamond-backed rattlesnake) | - | INV | G5 | S2 |
| Etheostoma pallididorsum (paleback darter) | - | INV | G2 | S2 |
| Hemidactylium scutatum (four-toed salamander) | - | INV | G5 | S3 |
| Lythrurus snelsoni (Ouachita shiner) | - | INV | G3G4 | SNR |
| Myotis austroriparius (southeastern myotis) | - | INV | G3G4 | S3 |
| Nocomis asper (redspot chub) | - | INV | G4 | S2? |
| Notropis perpallidus (peppered shiner) | - | INV | G3 | S2 |
| Noturus lachneri (Ouachita madtom) | - | INV | G2 | S2 |
| Noturus taylori (Caddo madtom) | - | INV | G1 | S1? |
| Pantherophis emoryi (Great Plains ratsnake) | - | INV | G5 | S3 |
| Percina sp. nov. (Ouachita darter) | - | INV | G2? | SNR |
| Percina uranidea (stargazing darter) | - | INV | G3 | S3 |
| Plethodon angusticlavius (Ozark zigzag salamander) | - | INV | G4 | S3 |
| Plethodon caddoensis (Caddo Mountain salamander) | - | INV | G2 | S2 |
| Plethodon fourchensis (Fourche Mountain salamander) | - | INV | G2Q | S2 |
| Plethodon serratus (southern red-backed salamander) | - | INV | G5 | S3 |
| Plants
- Vascular |
| Acer saccharum
var. leucoderme (chalk maple) | - | INV | G5T5 | S2S3 |
| Amorpha ouachitensis (Ouachita indigo-bush) | - | INV | G3Q | S3 |
| Amsonia hubrichtii (Ouachita bluestar) | - | INV | G3 | S3 |
| Asplenium pinnatifidum (lobed spleenwort) | - | INV | G4 | S3 |
| Asplenium x gravesii (Graves' spleenwort) | - | INV | GNA | S1 |
| Cardamine angustata (slender toothwort) | - | INV | G5 | S2 |
| Carex bromoides
ssp. bromoides (brome sedge) | - | INV | G5T5 | S2 |
| Carex emoryi (Emory's sedge) | - | INV | G5 | S1 |
| Carex laevivaginata (smooth-sheath sedge) | - | INV | G5 | S2 |
| Carex latebracteata (Waterfall's sedge) | - | ST | G3 | S3 |
| Carex leptalea (bristly-stalk sedge) | - | INV | G5 | S2S3 |
| Carex pensylvanica (Pennsylvania sedge) | - | INV | G5 | S3 |
| Carex prasina (drooping sedge) | - | INV | G4 | SH |
| Carex stricta (tussock sedge) | - | INV | G5 | S3 |
| Carex timida (timid sedge) | - | INV | G2G4 | S2S3 |
| Cirsium muticum (swamp thistle) | - | ST | G5 | S1 |
| Cypripedium kentuckiense (Kentucky lady's-slipper) | - | INV | G3 | S3 |
| Delphinium newtonianum (Moore's delphinium) | - | INV | G3 | S3 |
| Dennstaedtia punctilobula (hay-scented fern) | - | INV | G5 | S2 |
| Didiplis diandra (water-purslane) | - | INV | G5 | S1S3 |
| Diphasiastrum digitatum (southern running-pine) | - | INV | G5 | S1S2 |
| Draba aprica (open-ground whitlow-grass) | - | ST | G3 | S2 |
| Dryopteris celsa (log fern) | - | INV | G4 | S2 |
| Dryopteris x australis (Dixie wood fern) | - | INV | GNA | S1 |
| Dulichium arundinaceum
var. arundinaceum (three-way sedge) | - | INV | G5TNR | S2S3 |
| Eleocharis wolfii (Wolf's spike-rush) | - | INV | G3G4 | S3 |
| Elymus churchii (Church's wild rye) | - | INV | G2G3 | S2? |
| Eriocaulon koernickianum (small-head pipewort) | - | SE | G2 | S2 |
| Euphorbia longicruris (wedge-leaf spurge) | - | INV | G4G5 | S1 |
| Euphorbia sp. nov.
(Ouachita spurge) | - | INV | GNR | S3 |
| Festuca versuta (Texas fescue) | - | INV | G3 | S1 |
| Galium arkansanum
var. pubiflorum (hairy-flower Arkansas bedstraw) | - | INV | G5TNR | S2 |
| Gaylussacia baccata (black huckleberry) | - | INV | G5 | S3 |
| Gratiola brevifolia (sticky hedge-hyssop) | - | INV | G4 | S3 |
| Helianthus occidentalis
ssp. plantagineus (plantain-leaf sunflower) | - | INV | G5T2T3 | S1 |
| Heuchera villosa
var. arkansana (Arkansas alumroot) | - | INV | G5T3Q | S3 |
| Houstonia ouachitana (Ouachita bluet) | - | INV | G3 | S3 |
| Hydrophyllum brownei (Browne's waterleaf) | - | INV | G2 | S2 |
| Ilex longipes (Georgia holly) | - | INV | G5 | S3 |
| Iris verna var.
smalliana (dwarf iris) | - | INV | G5T4T5 | S2 |
| Liatris compacta (Ouachita blazing-star) | - | INV | G3 | S3 |
| Luzula acuminata
var. carolinae (Carolina wood-rush) | - | INV | G5T4T5 | S2 |
| Marshallia caespitosa
var. caespitosa (Barbara's-buttons) | - | INV | G4T4 | S2 |
| Osmorhiza claytonii (hairy sweet-cicely) | - | INV | G5 | S1S3 |
| Paronychia virginica (yellow nailwort) | - | INV | G4 | S2 |
| Platanthera flava (rein orchid) | - | ST | G4? | S2S3 |
| Polymnia cossatotensis (Cossatot leafcup) | - | INV | G1 | S1 |
| Ptilimnium nodosum (harperella) | LE | INV | G2 | S2 |
| Quercus acerifolia (maple-leaf oak) | - | ST | G1 | S1 |
| Sanicula smallii (Small's black-snakeroot) | - | INV | G5 | S3 |
| Selaginella arenicola
ssp. riddellii (Riddell's spike-moss) | - | INV | G4T4 | S3 |
| Sium suave (water-parsnip) | - | INV | G5 | S1S3 |
| Solidago ouachitensis (Ouachita goldenrod) | - | INV | G3 | S3 |
| Stachys iltisii (Ouachita
hedge-nettle) | - | INV | GNR | S3 |
| Stenanthium gramineum (featherbells) | - | INV | G4G5 | S3 |
| Streptanthus maculatus
ssp. obtusifolius (Arkansas twistflower) | - | INV | G3T3 | S3 |
| Tradescantia longipes (dwarf spiderwort) | - | INV | G4 | S2 |
| Trichomanes petersii (dwarf bristle fern) | - | ST | G4G5 | S2 |
| Trillium ozarkanum (Ozark trillium) | - | INV | G3 | S3 |
| Uvularia perfoliata (perfoliate bellwort) | - | INV | G5 | S3 |
| Valerianella nuttallii (Nuttall's cornsalad) | - | INV | G2? | S2 |
| Valerianella palmeri (Palmer's cornsalad) | - | INV | G3 | S3 |
| Veratrum woodii (Wood's false hellebore) | - | INV | G5 | S3 |
| Vernonia lettermannii (Letterman's ironweed) | - | INV | G3 | S3 |
| Vitis rupestris
(sand grape) | - | INV | G3 | S3 |
| Special
Elements - Natural Communities |
| Ouachita Mountain Forested Seep | - | INV | GNR | SNR |
| Ozark-Ouachita
Shortleaf Pine-Oak Forest | - | INV | GNR | SNR |
| Upland Headwater
Stream-Ouachita Mountains | - | INV | GNR | SNR |
| Upland Stream-Ouachita
Mountains | - | INV | GNR | SNR |
| Special Elements
- Other |
| Colonial nesting site, water birds | - | INV | GNR | SNR |
| Geological feature | - | INV | GNR | SNR |
