58 



PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



The raeasurements given under the head of the species enumerated 

 in the following list include all the reliable ones which 1 have made up 

 to date, or which I have been able to get upon unimpeachable authority, 

 and, it should be understood, cancel all measurements or estimates pre- 

 viously published by me ivhen in excess of those here given. They include 

 no estimates of height, but only actual tape-line measurements of pros- 

 trate trees or else very careful measurements of isolated standing trees 

 with a thoroughly-tested " dendrometer," although the specimens meas- 

 ured by the latter method are very few indeed. 



The following species, usually classed as shrubs, are not included, 

 though some of them may occasionally reach 30 feet in height, l^o 

 measurements, however, have been taken of any of them : 



1. Xanthoxylum americanum. Prickly Ash. 



2. Ptelea trifoliata. Hop Tree ; Wafer Ash. 



3. Euonymus atroimrpureus. Burning Bush ; Waahoo. 



4. Hydrangea arhorescens. Wild Hydrangea. 



5. Hamamelis virginica. Witch Hazel. 



6. Ilex decidua. Deciduous Holly. 



7. Forestiera acuminata. Forestieria. 



8. Lindera benzoin. Spice Bush. 



9. Alnus serrulata. Smooth Alder. 



10. Aralia sjnnosa. Hercules' Club ; " Devil's walking-stick." 

 On the other hand, a small number which are not usually classed as 

 trees are so considered here, having been found to attain, occasionally, 

 at least, a height of 30 feet or more. They are the following : 



Maximum height as measured. 



Uex verticillata 



Rhus glabra 



Rhus copallina 



Amorpha fiuticosa. 



28 feet, hut taller ones seen. 

 30 feet. 

 33* feet. 

 35'feet. 



Smithsonian Institution, Juhj 20, 1881. 



CATALOGUE. 



1. (1.) * Magnolia acuminata. Cucumber Tree. 



I have never seen a tree of this species growing in any part of the 

 district under consideration. I have heard, however, that a few grow 

 on Sugar Creek, in the southern part of Wabash County, but have been 

 unable to verify the rumor. It grows quite abundantly in the extreme 

 southern portion of Illinois (Johnson and Union Counties), where the 



*Tbemiiuber in parentliesis prefixed to the name of a species corresponds in each 

 case -with that given in Professor Sargent's Catalogue of the Forest Trees of North 

 America, published by the Census Bureau (Washington, 1881). When no second num- 

 ber is given, the si)ecies is one not included in the catalogue in question. 



