PLATE IV. 



O-tl.jCX-tvr.QL continued. 



FIG. 1. PORTION OF LEAF. Showing 



Autheridium, male organ, or globule. 



Carpogonium, female organ, nucule, sporangium, or spore-fruit (Gr. spora, a seed ; cmgeion, a 



vessel). 



FIG. 2. THE ANTHEEIDIUM DISSECTED. Showing 

 a. Shield. 



Manu'brium (L. a handle). 



Capitulum (L. a little head) (blue). 



Secondary capitula (blue). Not named on drawing. 



Filaments. 



I. Portion of filament, with a spermatozoid in each of its cells. 

 c. A liberated spermatozoid, with two long cilia. 

 FIG. 3. THE CAEPOGONIUM OB NUCULE 



Central cell. 



Twisted filaments, quite different from the filaments of the antheridium. 



The one-celled corona in Chara, and the two-celled corona in Nitella. 

 FIG. 4. DEVELOPMENT OF THE CAEPOGONIUM OR SPOEE-FRUIT. Sectional view. 

 FIG. 5 and DIAGRAM I. Showing DEVELOPMENT OF THE SPORE, enclosed in sporocarp 



Proembryo. 



Pseudo-whorl of leaves, with the Chara in its axil. 



CLASSIFICATION OF CHARACE^. 



Kingdom Plantsc. 



Sub-Kingdom Thallophjta (exceptional in having axis and appendages). 



Class Carposporeoe, because it has a spore fruit. 



Group Algos. 



Order Characese. 



Genera Chara and Nitella. 



THE BRACKEN FERN. 



FIG. 1. Showing 



( lludimentary leaf. 



LEAVES -f leaf. 

 I Cut leaf. 



Old leaf. 

 Underground stern or rhizome (Gr. rJu'za, a root ; omos, the same as) with its growing point. 



lioots. 



