Seed Plants, Ferns, Fern Allies of the Austin Region 47 



CALLITRICHACEAE Water Starwort Family 



Callitriche heteraphylla Pursh. Water Starwort. 



Pools in small streams. A slender plant with small opposite 

 leaves and stems partly or entirely submerged. 



Widespread in eastern and central North America. 



SAPINDALES 

 SPONDIACEAE (ANACARDIACEAE) Sumac Family 



Rhus radicans L. Poison Ivy. 



Abundant in moist ravines. Shoal Creek. 



A very poisonous vine, climbing by roots, and with 3-foliate leaves. 



Widespread in eastern and central North America. 



Rhus Toxicodendron L. Poison Oak. 



Poisonous. Very similar to the preceding but an upright shrub, 

 not climbing. 



Southeastern states. 



Schmaltzia lanceolata Small. (Rhus copallina var. lanceolata A. 

 Gray.) Sumac. 

 Abundant on the dry hillsides of the Edwards Plateau. 

 A tall shrub pinnately compound leaves. 

 Texas. 



Schmaltzia trilobata Small. (Rhus canadensis var. trilobata Gray.) 

 Skunk Bush. Ill-scented Sumac. 



Abundant in ravines and on hillsides. Easily recognized by its 

 three leaflets and its disagreeable odor. 



Central and western states. 



Schmaltzia virens Small. (Rhus virens Lindh.) Evergreen Sumac. 



An evergreen shrub with pinnately compound leaves. Abundant 

 on the dry hillsides of the Edwards Plateau. 



Texas, New Mexico, and Northern Mexico. 



AQUIFOLIACEAE Holly Family 



Ilex decidua Watt. Deciduous Holly. Possum Haw. Bear-berry. 

 Very common in ravines and well known by its abundant scarlet 

 berries. A shrub or small tree. 



Ilex vomitoria Ait. Yaupon. 



A beautiful evergreen shrub with scarlet berries common in the 

 moist ravines of the Edwards Plateau. 



Southeastern states. 



