Seed Plants, Ferns, Fern Allies of the Austin Region 21 



SALICALES 



SALICACEAE Willow Family 



Populus deltoides Marsh. (P. monilifera Ait.) Cottonwood. 

 River flood plain. 

 Central North America from Canada to Texas and New Mexico. 



Salix nigra Marsh. Black Willow. 

 Along the river banks. 



FAGALES 



FAGACEAE Beech Family 



Quercus breviloba Sargent. Shin Oak. White Oak. 



Rocky banks along streams. 



Forming thickets ("shinneries") in the Edwards Plateau region. 

 Can be recognized by the bark which peels off in thin sheets. 



Confined chiefly to middle and southern Texas. 



Quercus fusiformis Small. Mountain Live Oak. 



Dry hillsides of the Edwards Plateau. An evergreen shrub or small 

 tree, with very smooth, slender branches. 



Central Texas, probably derived from Q. virginiana. 



Quercus macrocarpa Michx. Bur Oak. 



Walnut Creek. The acorns are very large and the cups are fringed. 

 Eastern North America. 



Quercus marilandica Muench. Black Jack. 



Gravelly uplands. Abundant on the terrace gravels with Q. Minor. 



Southern and eastern to the central states. More abundant in the 

 South. Characteristic of sandy and gravelly soils in Texas with 

 Q. minor. Leaves angular deep green and glossy. Bark blackish. 



Quercus minor Sarg. (Q. stellata Wang.) Post Oak. 



Gravelly uplands. Abundant on the terrace gravels with Q. mari- 

 landica. 



Southern and eastern central states, more abundant in the South. 

 This tree occurs in Texas with Q. marilandica in the "post oak" 

 forests in the sandy and gravelly soils of the eastern part of the 

 state west of the pine area. 



Quercus schneckii Britton. (Q. texana Sarg., not Buckl.) Red Oak. 



Ravines and hillsides. Chiefly in the Edwards Plateau. Leaves 

 glossy, deeply lobed and with sharp pointed teeth. 



Southeastern states. 



