PLANTS OF RHODE ISLAND. 115 
MICROCOLEUS, Desm. et Thuret. 
1. terrestris, Desm. Common. 
2. anguiformis, Harv. Geneva. 
3. hyalinus, (Kg.) Kirch. Davisville. 
OSCILLARIA, Bosc. 
1, subtilissima, Kg. Common. 
2. detersa, Stiz. Roger Williams Park. 
3. antliaria, Juerg. Common. 
4, leptotrichia, Kg. Providence. 
5. violacea, Wallr. Common. 
6. tenuis, Ag. Providence, Mr. Lathrop. 
7. nigra, Vauch. Common, 
8. princeps, Vauch. Common. 
LEPTOTHRIX, Kg. 
1. tenax, Wolle. Common. 
2. ceespitosa, Kg. Common. 
3. rigidula, Kg. Spectacle Pond. 
4. bullosa, Wolle. Quidnessett. 
5. ochracea, Kg. Very common. 
ASTEHROTHRIX, Kg. 
Creginii, Wolle. (?) Pocasset. 
(This plant accords with Mr. Wolle’s description and figure, but 
had not the least tinge of color.) 
SPIRULINA, Lk. 
Jenneri, Kg. Quidnessett, rare. 
Chroococcacee. 
MERISMOPEDIA, Meyen. 
1. glauca, Naegr. Common; Providence, Mr. Lathrop. 
2. convoluta, Breb. Common. 
CA LOSPHERIUM, Naegr. 
Kuetzingianum, Naegr. Common; Providence, Mr. 
Lathrop. 
CLATHROCYSTIS, Henfr. 
zeruginosa, Henfr. Common, at times abundant. 
GOMPHOSPHARIA, Kg. 
aponina, Kg. Providence, &c. 
APHANOCAPSA, Naegr. 
Grevillei, (Hass.) Rab. Benedict and other ponds. 
