TABLE OF CONTENTS 
No. 8, October 
Taxonomic characters of the genera Alternaria and Macrosporium 
(with eleven text figures and plates XIX and XX) 
John A. Elliott 439 
Crown-rot of fruit trees: histological studies (with plates XXI- 
XXVII) J. G. Grossenbacher 477 
No. 9, November 
Effect of soil temperature on the growth of bean plants and upon 
their susceptibility to a root parasite Donald Reddick 513 
The development of Cortinarius pholideus (with plates XXVIII 
and XXIX) W. H. Sawyer, Jr. 520 
Leaf-structure as related to environment (with six text figures) 
Herbert C. Hanson 533 
No. 10, December 
The phytogeography of Manoa Valley, Hawaiian Islands (with 
fourteen text figures) Vaughan MacCaughey 561 
Revision of the Hawaiian species of the genus Cyrtandra, section 
Cylindrocalyces Hillebr. (with five text figures) 
Joseph F. Rock 604 
On the distribution of abnormalities in the inflorescence of Spiraea 
Vanhouttei (with four text figures and plates XXX and 
XXXI) J. Arthur Harris 624 
Index to Volume IV 637 
(Dates of publication: No. i, Feb. 3; No. 2, Feb. 17; No. 3, Mar. 
23; No. 4, May 8; No. 5, May 31; No. 6, June 29, No. 7, July 14; 
No. 8, Oct. 2; No. 9, Nov. 24; No. 10, Dec. 12.) 
