The habitat was characterized by Bermudagrass, buffelgrass (Cenchrus ciliaris), Guineagrass (Panicum maximum), Johnson grass (Sorghum halepense), southwestern bristlegrass (Setaria scheelei), dock (Rumex chrysocarpus) and cattail (Typha domingensis).
Black willow displaced barnyardgrass along the riverbank, and plains bristlegrass, buffelgrass, Guineagrass and blue panicum became established in open areas.
Seedeaters at Site 2 were observed feeding on southwestern bristlegrass, barnyardgrass and Louisiana cupgrass.
Native perennial grasses recorded included (in order of decreasing abundance): Aristida purpurpea (purple threeawn); Leptochloa panacea (mucronate sprangletop); Muhlenbergia porteri (bush muhly); Bouteloua rothrockii (Rothrock's grama); Dasyochloa pulchella (low woolygrass); Heteropogon contortus (tanglehead); Pleuraphis rigida (big galleta); Aristida ternipes (spidergrass); Bothriochloa barbinodis (cane bluestem); Bouteloua repens (slender grama); Setaria vulpiseta (plains bristlegrass
); and Tridens muticus (slim tridens).
(*#) Setaria faberi Herrm.; Nodding or Giant Foxtail-Grass, Japanese Bristlegrass
; Roadside fields, especially near dump; Infrequent, but locally common; C = 0; BSUH 17473.
Warm-season perennials such as tanglehead (Heteropogon contortus), plains bristlegrass
(Setaria machrostachya) and multiflowered false rhodesgrass (Chloris pluriflora) dominated the Sandy Loam and Shallow Sandy Loam range sites of south Texas under pre-European settlement conditions (Stevens & Arriaga 1985).
We purchased seeds of three species of native grasses (switchgrass Panicum virgatum,plains bristlegrass Setaria leucopila, and Texas millet Urochloa texana) from local suppliers; none was from named cultivars.
RESULTS AND DISCUSSION--Northern bobwhites consumed considerably more (Tukey's test, P [less than or equal to] 0.05) mass of seeds of switchgrass and fewer seeds of plains bristlegrass compared to seeds of guineagrass and Texas millet during the single and multiple-offering experiments (Fig.
Texas bristlegrass (Setaria texana) had a positive relationship with P.
Texas bristlegrass (Setaria texana) was more abundant (P = 0.0009) inside the dripline of P.
Certain perennial graminoids were primarily in grasslands (Bouteloua rigidiseta, Bothriochloa ischaemum, bermuda grass Cynodon dactylon, Hilaria belangeri, and panic grass Panicum hallii), whereas others (Cyperus, Virginia wildrye Elymus virginicus), and southwestern bristlegrass
Setaria scheelei) were restricted largely to juniper or live oak habitats.
Subordinate streamside vegetation is comprised of seepwillow baccharis (Baccharis salicifolia), which is dominant, deergrass (Muhlenbergia rigens), cattail (Typha latifolia), annual spikesedge (Eleocharis caribaea), Grisebach bristlegrass
(Setaria grisebachii), plains bristlegrass
(Setaria leucopila), barnyard grass (Echinochloa crusgalli), knotgrass (Paspalum distichum) and water bentgrass (Agrostis semiverticillata).
Dominant grass species were buffalograss (Buchloe dactyloides), Texas wintergrass (Stipa leucotricha), meadow dropseed (Sporobolus asper), little bluestem (Schizachyrium scoparium), plain bristlegrass
(Setaria leucopila), pink tridens (Tridens congestus), and longtom (Paspalum lividum).
Major subdominants include silver bluestem (Bothriochloa saccharoides), big bluestem (Andropogon gerardii), plains bristlegrass (Setaria leucopila), sideoats grama (Bouteloua curtipendula), Texas wintergrass (Stipa leucotricha), buffalograss (Buchloe dactyloides), hairy grama (Bouteloua hirsuta), knotroot bristlegrass (Setaria geniculata), indiangrass (Sorhastrum nutans), eastern gamagrass (Tripsacum dactyloides), and big sandbur (Cenchrus myosuroides).
The transition to the marsh communities is marked by an increase in bushy bluestem (Andropogon glomeratus) and knotroot bristlegrass.