22 University of Texas Bulletin 



Quercus virginiana Mill. Live Oak. 



Abundant in low ground and hillsides. Our common evergreen oak. 

 Characteristic of the coastal regions from Virginia to Mexico. 



URTICALES 



URTICACEAE Nettle Family 



Boehmeria cylindrica Willd. False Nettle. 



Moist ravines. Nettle-like, but without stinging hairs. 

 Eastern and central North America. 



Parietaria obtusa Rydb. Pellitory. 



Very abundant in moist soil on shaded banks and hillsides. Leaves 

 ovate or ovate-oblong with relatively long petioles. Involucral bracts 

 oblong obtuse. Sepals ovate, usually acute at the apex. 



West-central states. 



Parietaria pennsylvanica Muhl. Pellitory. 



Shaded ground. Leaves usually lanceolate, with shorter petioles 

 than the preceding. Involucral bracts linear. Sepals oblong or 

 lanceolate, acute. 



Urtica chamaedryoides Pursh. Nettle. 



Abundant in moist ravines and thickets. Well known for its sting- 

 ing hairs. 



Southeastern United States. 



ARTOCARPACEAE (MORACEAE) Mulberry Family 



Broussonetia papyrifera Vent. White Mulberry. Paper Mulberry. 



Low ground. A common shade tree in Austin. Like a mulberry, 

 but with thick, velvety leaves. 



Introduced from Asia. Eastern and southern states. 



Morus microphylla Buckl. Small-leaved Mulberry. Mexican Mul- 

 berry. 



Ravines of the Edwards Plateau. A shrub or small tree. Leaf 

 blades 3 to 5 cm. long. Fruit 1 to 1.5 cm. long. 



Western Texas to Arizona and northern Mexico. 



Morus rubra L. Red Mulberry. 



In moist ravines of the Edwards Plateau. Leaf blades 6 to 20 cm. 

 long. Fruit 3 or more cm. long. 



Eastern United States. 



