MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 1 25 



ture. The cortical cells of the etiolated stems were richly loaded 

 with starch, as well as the guard cells of the stomata. The differ- 

 ence between the sizes of the epidermal cells in the etiolated and 

 normal specimens was not great. 

 The red anthocyan of the normal 

 specimen was lacking from the 

 etiolated specimen. The great air 

 spaces of the cortex are present 

 in both the etiolated and normal. 

 The glandular ducts were also 

 present. The stele remained in 

 an embryonic condition ; the cam- 

 bium ring was apparent, and was 

 fairly complete. A number of 

 elongated cells in the phloem with 

 dense contents and strictly trans- 

 verse walls seemed to be sieve 

 tubes arrested in an early stage of 

 development. A few layers of 

 closely packed parenchyma cells 

 lay closely to the internal surface 

 of the xylem, while the central 

 pith was made up of plates of cells 

 with great air-spaces. 



A comparison of the etiolated 

 stems, with the bulbils reveals the ^ „ t ■ ,■ . . ■ t^ .- , 



fiG. 01. L,ysitttac/na terrestris. Partial 

 fact that the anatomy of the two transverse section of etiolated stem. A, 

 is very closely similar, and both pith and cortex; BB, protoxjlem; CC, 



maybe regarded as stems in a ^ieve-iike ceils ; z?z?, ducts. 



state of arrested, or very incomplete, differentiation of the tissues. ^^^ 



Menispermum Canadense L. 



A number of the underground rhizomes of Menispenmim were 

 placed in the dark chamber in January, 1900. The aerial stems, 

 which are lateral branches from the rhizomes, soon made their appear- 

 ance, and in three months attained a length of 25 to 50 cm., with the 



'^MacDougal, D. T. Vegetative propagation of Lysimachia terrestis. Bull. N. Y. 

 Botanical Garden, 2: No. 6. p. 82. 1901. See also Practical Text-Book of Plant 

 Physiology, pp. 320, 326. 1901. 



