PLATE IV. 



- continued. 



Yin. 1. PORTION OF LEAF. Showing 



Antheridium, male organ, or globule. 



Carpogonium, female organ, nucule, sporangium, or spore- fruit (Or. itpora, r\ seed; angeion, a 



vessel). 



FIG. 2. THE ANTHKIUDIUM DISSECTED. Showing 

 a. Shield. 



Manu brium (L. a handle). 



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



Secondary capitula (blue). Not named on drawing. 



Filaments. 



1&amp;gt;. Portion of filament, with a spermatozoid in each of its cells. 

 c. A liberated spermatozoid, with two long cilia. 

 Fio. 3. THE CARPOGONIUM on 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 Nitellu. 

 FIG. 4. DEVELOPMENT OF THE CARPOGONIUM OR SPORE-FRUIT. Sectional view. 

 Fio. 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^L 



Kingdom Plantiu. 



Sab-Kingdom Thallophyta (exceptional in having axis and appendages). 



Class Carposporeoe, because it has a spore fruit. 



Group Algae. 



Order Cliaracea?. 



Genera Chara and Nitella. 



THE BRACKEN FERN. 



FIG. 1. Showing 



( Rudimentary leaf. 



T , ng leaf. 



J_,LA\LS &amp;lt; 



J Cut leaf. 



( Old leaf. 



Underground stem or rhizome (Gr. rliiza, a root; onws, the same as) with its growing point. 

 Hoots. 



