Post Oak Savannah

The Post Oak Savannah lies just to the west of the Pineywoods and mixes considerably with the Blackland Prairies area in the south. This area includes the entire Claypan land resource area of Texas, which is part of the Southern Coastal Plains. The Post Oak Savannah, a gently rolling, moderately dissected wooded plain, is the home biota of Texas A&M University. Upland soils are gray, slightly acid sandy loams, commonly shallow over gray, mottled or red, firm clayey subsoils. They are generally droughty and have claypans at varying depths, restricting moisture percolation. The bottomland soils are reddish brown to dark gray, slightly acid to calcareous, loamy to clayey alluvial.


Thumb Species Characteristics

Abronia fragrans
Fragrant verbena, Sand verbena, Snowball, Snowball sand verbena, Sweet sand-verbena

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Acer negundo
Box elder, Box elder maple, Ash-leaved maple, Ashleaf maple, Red River maple, Fresno de guajuco

Duration: Perennial
Habit: Tree
Light: Sun
Water: Moist

Acer rubrum var. drummondii
Drummond's maple, Drummond red maple, Swamp maple

Duration: Perennial
Habit: Tree
Light: Part-shade
Water: Wet, Moist

Achillea millefolium
Common yarrow, Western yarrow, Yarrow, Milfoil

Duration: Perennial
Habit: Herb
Light: Sun, Part-shade
Water: Dry

Aesculus glabra var. arguta
Ohio buckeye, White buckeye, Texas buckeye

Duration: Perennial
Habit: Tree
Light: Part-shade
Water: Wet, Moist

Aesculus pavia var. flavescens
Texas yellow buckeye, Yellow woolly buckeye, Pale buckeye, Plateau yellow buckeye

Duration: Perennial
Habit: Shrub, Tree
Light: Part-shade
Water: Moist

Aesculus pavia var. pavia
Scarlet buckeye, Red buckeye, Southern buckeye, Firecracker plant

Duration: Perennial
Habit: Shrub, Tree
Light: Part-shade
Water: Moist, Dry

Allium canadense var. canadense
Canada onion, Meadow garlic, Wild onion

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Allium canadense var. mobilense
Meadow garlic, Wild onion

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Allium coryi
Yellow-flowered onion, Yellowflower onion

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Allium drummondii
Drummond's onion, Wild Garlic, Drummond wild onion

Duration: Perennial
Habit: Herb
Light: Sun
Water: Dry

Alophia drummondii
Propeller flower, Purple pleat-leaf, Pinewoods lily, Prairie iris, Pleatleaf iris

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Aloysia gratissima
Whitebrush, Bee-brush, White-brush, Common bee-brush, Beebrush, Privet lippia

Duration: Perennial
Habit: Shrub
Light: Sun, Part-shade
Water: Moist

Amorpha fruticosa
Indigo bush, False indigo bush, False indigo, Desert false indigo

Duration: Perennial
Habit: Shrub
Light: Sun, Part-shade
Water: Moist

Ampelopsis cordata
Heartleaf peppervine, Heart-leaf ampelopsis

Duration: Perennial
Habit: Vine
Light: Part-shade
Water: Dry

Amsonia illustris
Ozark bluestar, Showy blue-star, Missouri blue star, Swamp bluestar

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Moist

Andropogon gerardii
Big bluestem, Tall bluestem, Turkeyfoot

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun, Part-shade
Water: Moist

Andropogon glomeratus
Bushy bluestem, Brushy bluestem

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun
Water: Wet, Moist

Andropogon ternarius
Splitbeard bluestem

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun, Part-shade
Water: Dry

Andropogon virginicus
Broomsedge, Broomsedge bluestem, Yellowsedge bluestem, Whiskey grass, Popotillo pajon

Duration: Perennial
Habit: Grass/Grass-like
Light: Part-shade
Water: Moist

Aphanostephus skirrhobasis
Lazy daisy, Arkansas lazy daisy, Arkansas doze-daisy

Duration: Annual
Habit: Herb
Light: Sun
Water: Dry

Aristolochia serpentaria
Virginia snakeroot, Virginia dutchmanspipe

Duration: Perennial
Habit: Herb
Light: Shade
Water: Dry

Aristolochia tomentosa
Woolly Dutchman's pipe, Common Dutchman's pipe

Duration: Perennial
Habit: Vine
Light: Part-shade
Water: Moist

Asimina triloba
Pawpaw, Common pawpaw, Custard apple, Indian banana, Wild banana

Duration: Perennial
Habit: Tree
Light: Sun, Shade, Part-shade
Water: Moist

Asplenium platyneuron
Ebony spleenwort

Duration: Perennial
Habit: Fern
Light: Shade, Part-shade
Water: Moist

Astragalus crassicarpus
Groundplum milkvetch, Ground plum

Duration: Perennial
Habit: Herb
Light: Sun, Shade, Part-shade
Water: Moist, Dry

Athyrium filix-femina ssp. asplenioides
Southern lady fern

Duration: Perennial
Habit: Fern
Light: Part-shade
Water: Wet, Moist

Baccharis halimifolia
Groundseltree, Sea-myrtle, Consumptionweed, Eastern baccharis, Groundsel, Groundsel bush, Salt marsh-elder, Salt bush, Florida groundsel bush

Duration: Perennial
Habit: Shrub
Light: Part-shade
Water: Wet

Baccharis neglecta
False Willow, Jara dulce, Poverty Weed, Roosevelt Weed

Duration: Perennial
Habit: Shrub
Light: Part-shade
Water: Dry

Bothriochloa saccharoides
Silver bluestem, Longspike silver bluestem

Duration: Perennial
Habit: Grass/Grass-like
Light: Part-shade
Water: Dry

Bouteloua curtipendula
Sideoats grama, Banderilla, Banderita, Navajita

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun, Part-shade
Water: Moist, Dry

Bouteloua dactyloides
Buffalograss, Buffalo grass

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun
Water: Dry

Bouteloua hirsuta
Hairy grama

Duration: Perennial
Habit: Grass/Grass-like
Light: Part-shade
Water: Dry

Bouteloua rigidiseta
Texas grama

Duration: Perennial
Habit: Grass/Grass-like
Light: Sun
Water: Dry

Callirhoe involucrata
Winecup, Purple poppy mallow

Duration: Perennial
Habit: Herb
Light: Sun, Part-shade
Water: Moist, Dry

Calylophus berlandieri ssp. pinifolius
Berlandier's sundrops, Square-bud primrose, Sundrops, Square-bud day-primrose

Duration: Perennial
Habit: Shrub
Light: Part-shade
Water: Dry

Calylophus hartwegii
Hartweg's sundrops, Western Primrose

Duration: Perennial
Habit: Herb
Light: Part-shade
Water: Dry

Camassia scilloides
Atlantic camas, Wild hyacinth

Duration: Perennial
Habit: Herb
Light: Shade, Part-shade
Water: Dry

Campsis radicans
Trumpet creeper, Trumpet vine, Common trumpet creeper, Cow vine, Foxglove vine, Hellvine, Devil's shoestring

Duration: Perennial
Habit: Vine
Light: Sun
Water: Moist, Dry

Carya illinoinensis
Pecan

Duration: Perennial
Habit: Tree
Light: Sun
Water: Moist

Carya texana
Black hickory, Buckley hickory, Pignut hickory

Duration: Perennial
Habit: Tree
Light: Part-shade
Water: Dry

Castilleja indivisa
Texas Indian Paintbrush, Entireleaf Indian Paintbrush, Texas Paintbrush, Indian Paintbrush, Scarlet Paintbrush

Duration: Annual
Habit: Herb
Light: Sun
Water: Dry

Ceanothus americanus
New Jersey tea, Redroot

Duration: Perennial
Habit: Shrub
Light: Shade, Part-shade
Water: Moist, Dry

Celtis laevigata
Sugar hackberry, Texas sugarberry, Sugarberry, Southern hackberry, Lowland hackberry, Hackberry, Palo blanco

Duration: Perennial
Habit: Tree
Light: Part-shade
Water: Dry

Centaurea americana
American basket-flower, American star-thistle, Basket-Flower, Star thistle, Shaving brush

Duration: Annual
Habit: Herb
Light: Part-shade
Water: Dry

Cephalanthus occidentalis
Common buttonbush, Buttonbush, Button willow

Duration: Perennial
Habit: Shrub
Light: Shade, Part-shade
Water: Wet, Moist

Cercis canadensis var. canadensis
Eastern redbud

Duration: Perennial
Habit: Tree
Light: Part-shade
Water: Dry

Cercis canadensis var. texensis
Texas redbud

Duration: Perennial
Habit: Tree
Light: Sun, Part-shade
Water: Dry

Chamaecrista fasciculata
Partridge pea, Sleepingplant, Sensitive plant

Duration: Annual
Habit: Herb
Light: Sun, Part-shade
Water: Moist, Dry

Chloris cucullata
Hooded windmill grass, Hooded windmillgrass

Duration: Perennial
Habit: Grass/Grass-like
Light: Part-shade
Water: Moist

Chloris virgata
Feather fingergrass, Showy chloris

Duration: Annual
Habit: Grass/Grass-like
Light: Part-shade
Water: Dry

Cirsium texanum
Texas thistle

Duration: Biennial
Habit: Herb
Light: Sun
Water: Dry

Clematis crispa
Swamp Leatherflower, Curly Clematis, Blue-jasmine, Curlflower, Curly Virgin's Bower, Marsh Clematis

Duration: Perennial
Habit: Vine
Light: Sun, Part-shade
Water: Wet, Moist

Clematis drummondii
Old man's beard, Drummond's clematis, Texas virgin's bower, Goat's beard

Duration: Perennial
Habit: Vine
Light: Sun, Part-shade
Water: Moist, Dry

Clematis pitcheri
Purple Leatherflower, Purple Clematis, Leatherflower, Bluebill, Bellflower Clematis, Pitcher's Clematis

Duration: Perennial
Habit: Vine
Light: Sun, Part-shade
Water: Moist

Cocculus carolinus
Carolina snailseed, Carolina coralbead, Carolina moonseed, Red berried moonseed, Carolina red berried moonseed

Duration: Perennial
Habit: Vine
Light: Part-shade
Water: Moist

Cooperia drummondii
Evening rain lily, Evening star rain lily

Duration: Perennial
Habit: Herb
Light: Sun, Part-shade
Water: Moist, Dry

Cooperia pedunculata
Hill Country rain lily, Prairie lily, Rain lily, Flor de mayo

Duration: Perennial
Habit: He