Kelley — 36 — Mycotrophy 



Amaryllidaceae (but no mycorrhizae in Aletris [Takamatsu] ) ; 

 Dioscorea (Asai) ; 4 genera of Iridaceae; Zingiber and Musa of 

 the Scitaminaceae ; Ananas of the Bromelidaceae ; while the Bur- 

 mannias have attracted much interest, the latest record by Ciferri 

 (1946). The orchids would require a separate section to do them 

 justice, for no less than 85 genera are described as mycorrhizal while 

 20 papers on orchid mycorrhizae have appeared in the last decade. 



