Seed Plants, Ferns, Fern Allies of the Austin Region 49 



Colubrina texensis A. Gray. 



A common shrub of the dry hillsides and hilltops of the Edwards 

 Plateau, growing often in dense thickets. 



Texas and northern Mexico. 



Condalia obovata Hook. 



One of the most abundant shrubs of the dry hillsides of the Ed- 

 wards Plateau. Thorny and often nearly leafless in the dry season. 



Central Texas to northern Mexico. 



Rhamnus caroliniana Walt. Buckthorn. Indian Cherry. ■ 



Common in the ravines of the Edwards Plateau. A shrub or small 



tree with firm glossy leaves and black berries. 

 Southeastern states. 



Ziziphus obtusifolia A. Gray. (Condalia obtusi folia.) Loti-bush. 

 Te'as Buckthorn. 

 On bluffs and rocky hillsides. A thorny shrub somewhat similar 

 to Condalia. 



Ziziphus vulgaris Lam. Jujube. 



Roadsides in Austin. Probably planted or escaped from cultiva- 

 tion. 



Naturalized in the Gulf states, from Europe and Asia. 



VITACEAE Grape Family 



Ampelopsis arborea Rusby. Pepper-vine. 



Moist ground in valleys. Shoal Creek. A climbing vine. 

 Southeastern states, West Indies, Mexico. 



Cissus incisa Desmoul. 



A climbing vine with crisp, succulent, 3-foli£ f e leaves, and black 

 berries. The foliage when crushed has a very disagreeable odor. 



Southern states. 



Parthenocissus quinqiiefolia Planch. \Ampelopsif Michx.) Virginia 

 Creeper. Woodbine. Five-leaved Ivy. 



A climbing vine often mistaken for poison ivy, but easily distin- 

 guished from it by its five leaflets, and its tendrils clinging by disks. 



Widespread in the eastern United States and Canada. 



Vitis candicans Engelm. Mustang Grape. 



Ravines. The leaves are white-woolly beneath. The grapes ripen 

 in July and are used by many people for jelly. 



Texas. 



