io8 



Fig. 149. Diagram, showing the position of the roots. 



ft 



Orontiiim aqitaticiim 



Fig. 150. A germinating plantlet, showing the primary root and three leaves, 



front view, nat. size. 

 131. Tlie same, a Uttle older, side view, nat. size. 

 152. A young plant with five leaves and four roots developed; the 



cotyledon is still attached. 



Anthiirium Andraeanum, 



■^^g- ^53- 'T^^^ fruit, 3 X ^^^^- size. 



154. The seed, 5 X ^^^- sixe. 



r 



155. The first stage of the germhiation, 5 X ^^t- size. 



15^- A germinating plantlet, showing the cotyledon, the plumule and 



the primary root, 6X ^^^^- size. 

 ^57- -A germinating plantlet, a little older, where the cotyledon is 



enclosed in the seed, and where the first leaf has been developed, 



6 X i^^^- size. 

 158. The first developed leaf, magnified. 



PLATE XIX. 



Anthiu'ium Andraeamim (continued). 



-^^S* ^59- A germinating plantlet, where the secondary leaf is visible, 6 X 



nat. size. 

 160- A young plant, showing the development of the first internode and 



four leaves ; two secondary roots have come out, 3 X ^^t- s^^^- 

 ibi. The same, a little older, showing the second internode. The 



seed is still attached, 3 X '^^t. size. 



162. A young plant, five months older than the one in Fig. 161. The 



seed is still attached, the primary root still persists and several 

 secondary roots have developed from the internodes rpf the 

 stem, 2 X nat. size. 



163. The leaf '*L8" from Fig. 162. 



164. A typical leaf, taken from a full-grown plant, J^ nat. size. 



Aglaonema ptctum. 



L 



Fig. 165, A germmatfng plantlet, showing three scale-like leaves, 2X ^^t- 



size. 



Alisnia Plant ago var. Americana, 



Fig, 166. A germinating plantlet, showing the long, terete cotyledon and 



the primary root, 8 X "^*' size. 

 167, The same, a little older, where the plumule is visible, 8 X ^^*' 



€ 





