38 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



leaves were sheathing and adherent to a distance of about 5 cm. from 

 the bulb in both the normal and etiolated examples. Normal leaves 

 were about 2 to 2.5 cm. in width are about 20 cm. long, being 

 curved and twisted. Etiolated leaves attained a length about equal to 

 the normal with inrolled margins and with a width of 12 to 15 mm. 

 The curvatures and torsions were much more marked than in the 

 normal, and the positions assumed were indicative of an entire lack 

 of geotropic sensibility. It is to be noted that this plant offers an 

 example of a monocotyledonous leaf which does not exceed any of 

 the dimensions of the normal. A creamy yellow color points to the 

 presence of a large amount of etiolin or carotin. 



Fig. I. Allium Neapolitatium, etiolated, showing positions and forms assumed by 

 leaves. ]A, natural size. 



Sachs^^ records that AllmmCefa developed etiolated leaves longer 

 than the normal and variously divergent. Such leaves were thinner 



128 Sachs. Ueber den Einfluss des Tageslichtes'auf Neubildung und Entfaltung ver- 

 schiedener Pflanzenorgane. Ges. Abhandl. i : 196. 1892. See also Sachs. Hand- 

 buch der phjsiologischen Botanik, p. 38. 1865. 



