ENDOGENOUS OR MONOCOTYLEDONOUS PLANTS. 



481 



ovules. Fruit a berry. Seeds with or without albumen. Ex. 

 Arum, Calla, Symplocarpus (Skunk-Cabbage), Orontium, Acorus 

 (Sweet Flag) : the three latter bear flowers furnished with a peri- 

 anth. All are endowed with an acrid volatile principle, which 

 is merely pungent and aromatic in Sweet Flag (Acorus Calamus). 



1073 1074 1072 



1068 



1067 



900. Ord, TyphaceSB (the Cat-tail Family) consists of two genera ; 

 namely, Typha (the Cat-tail), and Sparganium (Burr-reed), of no 

 important use ; they are somewhat intermediate between Aracese 

 and Cyperacese. 



901. Ord, Lemnaceffi (the Duck-weed Family), consisting chiefly 

 of Lemna (Duckweed, or Water Flax-seed) ; floating plants, with 

 their roots arising from the bottom of a flat frond, and hanging 

 loose in the water ; their flowers produced from the margin of the 

 frond, bursting through a membranous spathe ; the sterile, of one 



FIG. 1067. Youn? leaf, and 1068, spathes and flowers, of Symplocarpus foetida. 1069. A. 

 separate flower. 1070. A sepal and stamen seen from within. 1071. An anther seen from the 

 front. 1072. The spadix or collective head in fruit; a quarter-section removed, showing sec- 

 tions of the immersed seeds. 1073. A seed detached, of the natural size. 1074. Section of the 

 seed, with its large globular embryo and plumule : in this plant there is no albumen. 



41 



