9. 
ll. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
Catalogue of the Flora of Nebraska. 9 
ZYGOPHYTA. 
7. PALMELLACE. 
TETRASPORA Ag. 
10. T, EXPLANATA (Kg.) Kirch. Minden. In material collected by Dr. 
Hapeman (Bessey). 
. SORASTRUM Kg. 
11. S. sPrINULOsuM Kg. Minden. In material collected by Dr. Hape- 
man (Woods). 
HYDRODICTYON Roth. 
12. H. urRicuLatuM Roth. Stagnant water, plentiful. Fremont, 
July 31 (Williams). Lincoln (Bessey). 
PEDIASTRUM Meyen. 
13. P. ANGULOSUM (Ehbrb.) Menegh. (P. biradiatum Meyen). In 
material collected by Dr. Hapeman at Minden. (Woods). 
14. P. pertusum Kg. var. CLATHRATUM A. Br. (P. duplex Meyen). 
Minden. 1n material collected by Dr. Hapeman (Woods). 
8. PITHOPHORACE. 
PITHOPHORA Wittr. 
15. P. arFinis Nordst. In stagnant or slow running water. Green- 
wood, July (Williams). 
9. ULOTHRICHACE., 
STIGEOCLONIUM Kg. 
16. S. FASTIGIATUM Kg. Minden. In material collected by Dr. 
Hapeman (Bessey). 
APHANOCHAETE A. Br. 
17. A. GLoBosa (Nord.) Wolle. form. MINoR Nordst. growing on 
Nitella, in material from Minden collected by Dr. Hapeman,. 
(Woods). 
10. DESMIDIACEZ. 
DESMIDIUM Ag. 
18. D. swartzir Ag. Minden. In material collected by Dr. Hape- 
man (Bessey). 
SPHASROZOSMA Corda. 
19. P. seERRATUM Bailey. Minden. In material collected by Dr. 
Hapeman (Bessey). 
SPIROTZNIA Breb. 
20. S. CONDENSATA Breb. In material from Minden, collected by Dr. 
Hapeman. 
