92 PHYSICAL GEOGRAPHY. 



7. Hop Tree (Ptelea trifoliata^ Only found a few specimens 

 in Dakota and Dixon Counties, and on the Niobrara. 



8. Smooth Sumach (Rhus glabra?) Common in Nebraska. 



9. Dwarf Sumach (/?. copallina?) Only met with at long in- 

 tervals in the eastern counties. 



10. Fragrant Sumach (R. aromatica^] Have found this only on 

 the Niobrara. 



11. Alder-leaved Buckthorn (Rhamnus alnifolius^] Have only 

 met it at long intervals in northeastern Nebraska. 



12. New Jersey Tea (Ceanothus Americanus.) Common. 



13. Dwarf Redroot (C. ovalis.) Widely dispersed as the fore- 

 going, but not so abundant. 



14. Climbing, Bitter Sweet (Cetastrus scandens?) Common in 

 woodlands. Have seen it as far west as 101 meridian. 



15. Spindle Tree (Euonymus atropurpureusl) Only occasionally 

 found on the borders of timber belts. 



16. Strawberry Bush (E. Americanus.) Rarer than the preced- 

 ing, but found at long intervals over the greater part of eastern 

 Nebraska. 



17. Var. obovatus of the preceding, I found only in Dakota 

 County. 



18. American Bladder Nut (Staphylea trifolia.} Common along 

 the Missouri bluffs, on the Nemaha. Occasionally on the Blues and 

 on the Niobrara. 



19. False Indigo (Amorpho fruttcosa.) Common along all our 

 principal water courses. 



20. Yellow or Red Plum ( Prunus Americana?) Found in the 

 thickets in and bordering timber belts, in canyons, draws and narrow 

 valleys in almost every county in the State. In many places very 

 abundant. 



21. Chickasaw Plums (P? chicasa.} Same distribution as the 

 preceding. 



22. Dwarf Cherry Sand Hill Cherry (P. Pumilla.) Found 

 most abundantly in central and western Nebraska, on sand hills and 

 on sandy land. 



23. Choke Cherry (P. Vtrgimana.} Found all along the Mis- 

 souri, on the Niobrara, Platte, Nemaha, and in places on the Re- 

 publican. Sometimes becomes a small tree. 



24. Nine Bark (Spircea apulifolta.} This shrub grows from four 

 to six feet high. On the Niobrara, and rarely in eastern Nebraska. 



