Seed Plants, Ferns, Fern Allies of the Austin Region 15 



CYPERACEAE, Sedge Family 



Carex amphibola Steud. 



Hillsides and ravines of the Edwards Plateau. 

 Eastern and central states. 



Carex cherokeensis Schwein. 



Moist ground along stream. Bee Creek. 

 Southern states. 



Carex triangularis Boeckl. 



Low ground, Shoal Creek Valley, etc. 

 Southern central states. 



Cyperus ferax Vahl. 



Wet soil. Barton Springs. 



Warm and tropical regions of America. 



Cyperus filictdmis Vahl. 

 Dry woods. 

 Central and southern states and northern Mexico. 



Cyperus rotundas L. Nut-grass. 



Abundant in lawns and roadsides in Austin. A serious pest. 

 Southern states and tropical America. 



Dichromena colorata Hitchcock. Whitetop. 

 Not abundant here. 

 Coastal plain states from New Jersey to Texas. 



Dichromena nivea Boeckl. Whitetop. A smaller species than the 

 preceding. 



Abundant along the borders of streams and in swampy ground 

 along railroad tracks. Barton Creek. 



Southern states and the tropics. 



Fuirena simplex Vahl. Western Umbrella-grass. 

 Wet soil. Barton Springs, Shoal Creek, etc. 

 Nebraska, Texas, and Mexico. 



Scirpus vatidus Vahl. Bullrush. 

 Swamps. Not common here. 

 Widely distributed throughout North America. 



