ARBORICULTURE 



A MONTHLY MAGAZINE. 



oxj^/ 'JVM' 



Published in the Interest of the 

 International Society of Arboriculture. 



Subscription, $1.00 per annum. 



John P. Brown, Editor, Conner.sville, Indiana 



Volume II. 



Indianapolis, October, 1903. 



Number 9. 



Topics in Railway Officials Number 



CATALPA BLOSSOMS, .--... 



RAILWAY CROSS TIBS, -..-.- 



NEW EVIDENCES OF THE DURABILITY OF CA TALPA, 

 PRAIRIE KANSAS TO BECOME A FOREST CENTER. 

 THE PENNSYLVANIA RAILWAY'S EXPERIMENT 

 PROGRESS A T THE WORLD'S FAIR GROUNDS, 

 BOOK REVIEWS -_•_._._ 



PAGE 



375 

 377 

 380 

 383 

 386 

 388 

 391 



Catalpa Blossoms How to Distinguish Catalpa Speciosa. 



For our frontispiece this month we are 

 permitted to present a colored plate of the 

 flowers of catalpa speciosa, and for com- 

 parison one flower, No. IV, is the Japanese 

 variety, kempferii, which has become so 

 common in the United States. Another 

 single flower, No. II, is bignonoides, while 

 No. Ill is a hybrid. The great extent to 

 which the inferior varieties and hybrids 

 have been grown and distributed through- 

 out the world by careless nurserymen and 

 ignorant seed collectors, make it imperative 

 that seedsmen, nurserymen and dealers, as 

 well as farmers, should familiarize them- 

 selves with the methods of detecting worth- 

 less seeds and trees. 



Through the kindness of Miss Henrietta 

 Wilson, of the Art School, Cincinnati, 



Ohio, we were able to have made a water 

 color drawing from the natural flowers, 

 while Messrs. Williamson, Haffner & Co., 

 Denver, Colorado, made the plates for its 

 reproduction. 



Kempferii, it will be observed, has a 

 very distinct color by which it is easily 

 distinguished, although this shading is lost 

 in the hybrids. 



There is no forest tree which hybridizes 

 more readily, by insects which carry pollen 

 from flower to flower, than does the catalpa. 

 There are innumerable mixtures among 

 seedlings, where several varieties are 

 growing near together, some of which 

 closely resemble speciosa, while others 

 differ very materially. 



The flowers of hybrids also show the 

 characteristics of both parents, some being 



