Class. XIX,— MONOECIA, 



Order. I.— MONANDRIA. 



625. ZOSTERA. Z. (Grass-wrack.) 



Calix and corolla none. Anther ovate, sessile. 

 Germ ovate, inserted upon an unilateral spadix. 

 Style bifid. Capsule 1 -seeded. 



Marine plants, with alternate submersed linear leaves. 



Species. 1. Z. marina. Forming with Ruppia vast 

 floating- fields in the bay of Egg-harbour, New Jersey. 

 Indigenous to the whole Atlantic ocean. Three other 

 species are said to exist in the Red sea. 



626. CAULINIA. Willd. FLrviALis. Pcrsoon. 

 Calix and corolla none. Anther sessile. Style 



filiform. Stigma bifid. Capsule 1-seeded. 



Species. 1. C-fragilis. 2. fexilis. f JVlyas, Michaux.) 

 A. small genus of aquatic plants, common also to Europe- 



627. ZANNICHELLIA. L. ^ 

 Masc. Calix and corolla none. Feminine. 



Calix 1 -leaved. Corolla none. Germs and 

 seeds about 4. 



Aquatic: flowers solitary, axillary. 

 Species. 1. Z. palus'vis. Indigenous also to Europe, 

 where tliere exists a second species. 



328. CHARA. L. 



Calix and corolla none. Anther globose, ses- 

 sile. Style none. Stigmas 5. Berry 1 -celled, 

 many-seeded. 



Aquatic: stems mostly leafless, branching, branches 

 vert cillate, numei-oualy articulated, articulations dentate 

 and often l-fljwered. 



