ALGA. FUNGL 21 



Laminaria. (Devil's Aprons.) Fronds attached by a 

 branching bas 



4b. Frond tliin, subsessile, 

 Punctaria. Fruit forming dots on the surface of the frond, 

 lb. Thallus forming a crust or expanded pellicle on the 



substrate. 

 Ralfsia. Od rocks and wood-work. 

 1 c. Thallus tubular, not branching, 



5 a. Thallus densely clothed with hairs, 1 — 12 feet long. 

 Chorda. Thallus with numerous diaphragms. 



5 b. ThaUus destitute of hairs, shorter. 

 Scytosiphon. Thallus constricted at intervals. 



CHARACE^E. The following two genera are our only com- 

 mon ones : — 



Chara. Fruit with a crown formed of a single whorl of five 

 cells. Antheridia below the fruit-bod}'. 



Nitella. Fruit with a crown formed of two whorls, of five 

 cells each. Antheridium terminal upon the single node of the 

 primary leaf-like branch. 



CHLOROSPORE^E. Only marine genera are here given. 

 1 a. Frond m< iith,anaceous,flat or in the form of a tube. 



Ulva. (Sea Lettuce.) Frond simple or branching. 

 1 b. Frond filamentous. Destitute of hyaline hairs. 

 2a. Filaments brandling. 



Cladophora. Branches distinct. 

 Rhizoclonium. Branches small and rootlike. 

 2 b. Filaments not branching. 



Chsetomorpha. Rather coarse alga?, filaments more or less 

 rigid. Often twisted together. 



Ulothrix. Small alga?, filaments soft and flaccid. 



FUNGL Orders: 



1 a. Plant body consisting of mycelium, often more or less 

 modified in certain j>"rts. 



