
734 THE AMERICAN NATURALIST. 
Jackson’s theory regarding stages in the development of a 
single leaf. The peculiar phyllode form rather discourages the 
idea of formulating any law covering phyllode formation, and 
lends an extremely potent meaning to Reinke’s statement, 
«Der Wechsel von Phyllodien und Fiederblattern ist bei 
dieser Art [probably, as regards phylogeny, in others also] ein 
sehr mannigfaltiger.”’ 
REFERENCES. 
'99. JACKSON, R. T. Localized Stages in the Development of Plants and 
"Animals. Mem. Bost. Soc. Nat. Hist. Vol. v, pt. 
96. REINKE, J. Untersuchungen iiber die Aiaia do der 
"Leguminosen. Pringsheim’s Jahrb. f. wiss. Bot. Bd. xxx. 70 pP- 
