Webber — Catalogue of the Flora of Nebraska. 9 
ZYGOPHYTA: 
7. PALMELLACE. 
9. TETRASPORA Ag. 
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- STIGEOCLONIUM Kg. 
10. T. EXPLANATA (Kg.) Kirch. Minden. In material collected by Dr. 
Hapeman (Bessey). 
. SORASTRUM Kg. 
11. S. sprNuLosuM Kg. Minden. In material collected by Dr. Hape- 
man (Woods). 
- HYDRODICTYON Roth. 
12, H. urricuLtatuM Roth. Stagnant water, plentiful. Fremont, 
July 31 (Williams). Lincoln (Bessey). 
- PEDIASTRUM Meyen. 
13. P. ANGULOsUM (Ehrb.) 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. In material collected by Dr. Hapeman (Woods). 
8. PITHOPHORACEZ. 
- PITHOPHORA Wittr. 
15. P. arrinis Nordst. In stagnant or slow running sheets Green- 
wood, July sale srcirace 
ULOTHRICHACE. 
16. S. FrastigiatumM Kg. Minden. In material collected by Dr. 
Hapeman (Bessey). 
5, APHANOCH ETE A. Br. 
17. A. GLtosposa (Nord.) Wolle. form. Minor Nordst. growing on 
Nit “ee in material from Minden collected by Dr. ee 
(Woods). 
10. DESMIDIACEZ. 
- DESMIDIUM Ag. 
18. D. swarRTziI te Minden. In material collected by Dr. Hape- 
man (Besse 
- SPHAZROZOSMA Corda. 
19. P. sERRATUM Bailey. Minden. In material collected by Dr. 
Hapeman (Bessey). 
SPIROTANIA Breb. oe ee ie ae 
20. S. CONDENSATA Breb. In material from Minden, collected by Dr. se 
Hapeinan. pi Lae ake oe, ai: 
