Page 28 - Interp Book

Species # of plots Percent
Lespedeza cuneata 125 3.4%
Gutierrezia sarothrae 121 3.3%
Artemisia ludoviciana 109 2.9%
Sporobolus cryptandrus 105 2.8%
Bouteloua gracilis 104 2.8%
Ampelopsis cordata 96 2.6%
Bothriochloa ischaemum 94 2.5%
Danthonia spicata 90 2.4%
Andropogon gerardii 90 2.4%
Campsis radicans 85 2.3%
Tridens flavus 83 2.2%
Hordeum pusillum 81 2.2%
Lonicera japonica 79 2.1%
Helenium amarum 76 2.0%
Ambrosia trifida 63 1.7%
Lolium perenne 62 1.7%
Croton monanthogynus 57 1.5%
Setaria parviflora 56 1.5%
Ambrosia artemisiifolia 55 1.5%
Unknown 54 1.5%
Solidago ulmifolia 53 1.4%
Xanthium strumarium 50 1.3%

Bermudagrass (Cynodon dactylon) was the most commonly encountered species,
occurring in 859 plots, or 148 more (17.2% more) than the next most common species,
saw greenbriar (Smilax bona-nox). Other common species in the herbaceous layer
included field brome (Bromus arvensis), Canada wildrye (Elymus canadensis), western
ragweed (Ambrosia psilostachya), and cheatgrass (Bromus tectorum). Three of the six
most commonly encountered herbaceous species were non-native. The most
commonly encountered trees were post oak (Quercus stellata), blackjack oak (Quercus
marilandica), pecan (Carya illinoinensis), and sugar hackberry (Celtis laevigata). Post
oak was 38.7% more common than the next most common species. The most common
species recorded in the shrub layer was winged elm (Ulmus alata), followed by eastern
redcedar (Juniperus virginiana), soapweed yucca (Yucca glauca), and coralberry
(Symphoricarpos orbiculatus). Species that were common in both the tree and shrub
layers included sugar hackberry, blackjack oak, post oak, and eastern redcedar.

A total of 165 vegetation types were mapped for Oklahoma (Appendix 2). Of these, 87,
or 52.7% of the total, made up less than 10,000 hectares each, and 30 less than 1,000
hectares each. Row crops, Crosstimbers: Pasture/Prairie, and Central Mixedgrass:

20