THE STONE WORTS. 



/. Leaf. 



/'. Leaflets. 



/". Sterile leaflets. 



I. a. Apical cell of leaf. 



HI. Manubrium. 



me. Hicropyle. 



7i. Node. 



n.a. Last formed node. 



n.c . Cortical node. 



c. Nucleus. 



n.li. Leaf-bearing node of pro-embryo. 



n. r. Root-boaring node of the same. 



or. Oosphero. 



. Primary root. 



rli. Rootlets (rhizoids). 



K.II. Seginental cell. 



re. Sap vacuole. 



1 to 5. Nodes or their appendages, 1 to 5. 



i. to v. Internodes.'i. to v. 



