collection made serves to emphasize how great a gap is yet to 

 be filled in our knowledge of the Costa Rican flora ; and I ven- 

 ture to hope that it may be possible to continue the work of 

 exploration in this extremely diversified region. A carefully 



in Costa Rica. 



Finally, I wish to express my thanks to Mr. John M. Keith 

 and to Don Jose C. Zeledon, of San Jose, for the numerous 

 courtesies extended during my visit. At the suggestion of the 

 former, Mr. R. E. Brounger, General Manager of the Northern 

 Railway, kindly provided me free transportation over that line, 

 which was of very great convenience. To Mr. Zeledon I am 

 indebted for very many kindnesses and helpful suggestions. 

 Professor P. Biolley generously donated obout 75 duplicate 

 ferns, 8 living orchids from the Pacific slope, and several fungi, 

 for which I extended thanks on behalf of the Garden. I wish to 

 acknowledge also the cordial invitation of Mr. R. J. Schweppe, 

 the resident manager of the United Fruit Company, upon his 

 return from the United States, to spend some time in the vicinity 

 of Santa Clara, a famous botanical locality — an invitation amended 

 by my friend Mr. Victor M. Cutter, Superintendent of the Zent 

 District of the same company, to include a visit to the region 

 about Zent. It is a source of regret to me that lack of time 

 prevented an acceptance of either hospitality so generously 

 offered ; May 28, in fact, came only too quickly. On that day 

 I sailed from Port Limon on the Sarnia, reaching New York 

 June 6. Besides herbarium material, aggregating about 800 

 numbers, I brought four boxes of living plants, making a total 

 of 180 numbers secured for cultivation in the conservatories. 

 William R. Maxon. 



Dr. N. L. Britton, Director-in-Chief. 



Dear Sir : Having been granted a leave of absence durii 

 tenure of the Bruce Fellowship in the Johns Hopkins Univ 



