CONTENTS. 



Page. 



1. Reports for the Year 1908: — 



a. Report of the Officers of the Board 7 



b. Twentieth Annual Report of the Director 11 



2. Scientific Papers: — 



a. Summer birds of Shaw's Garden. — 



By Otto Widmann ■* 1 



b. Illustrated studies in the genus Opuntia-II.— 



Brj David Griffiths 81 



c. Variation and correlation in the flowers of Lagerstroemia 



indica. — 



By J. Arthur Harris 97 



d. The correlation between length of flowering stalk and num- 



ber of flowers per inflorescence in Nothoscordum and 

 Allium. — 



By J. Arthur Harris 105 



e. Correlation in the inflorescence of Celastrus scandcns. — 



By J. Arthur Harris 116 



/. An analytical key to some of the segregates of Oenothera. — 



By Reginald R. Gates 123 



g. The Missouri saxifrages. — 



By B. F. Bush 138 



3. Library Contributions: — 



a. A list of books and papers published from the Missouri 

 Botanical Garden or by its employees, or based chiefly 

 on work done by aid of the facilities of the Garden, from 

 January, 1904, to December, 1908, inclusive.— 



By Laura Brown 141 



4. Contributors, Volumes 1 1 to 20 151 



5. Indexes, Volumes 11 to 20. — 



By Cora J. Hogan. 



a. General Index 152 



*. Index to Latin names. , 161 



(5) 



