93 
Plants of the Detroit River. 
By DovucLass H. CAMPBELL. 
The accompanying list of plants was made during a month's 
visit to Grosse Isle, near the mouth of the Detroit River. in the 
summer of 1885. A large part of the shore of the river on both 
sides, and along the numerous islands is occupied by extensive 
marshes, which afford an extraordinarily rich harvest to the 
botanist. The list here given is, of course, imperfect, but will 
give some idea of the great variety of forms, especially among 
the Alege. 
PROTOPHYTA.—Gleococcus ampla, Kutz.; Chlorococcus gi- 
gas, Grun. (?); Caleospherium Kutzingianum, Neg.; Nephro- 
cyttum Negelit, Rabh.; Raphidium falcatum, Corda; Scenedes- 
mus quadricauda, Breb.; S. acutus, Mey.; Nostoc sphericum, 
Men.; WV. commune, Vauch.; Anabena Thwaitesit, Ralfs; Cylin- 
drospermum macrospermum, Kutz.; Merismopedia glauca, Neg. ; 
M. violacea, Kutz. (?); Oscillaria insignis, Thw.; O. erugines- 
cens, Drum.; O. tenuis, Ag.; Spirulina oscillarioides, Turp.; 
Rivularia echinata, Eng. Bot.; R. dura, Kutz.; R. calcarea, 
Eng. Bot. (?). 
ZYGOPHYTA.— Conferva fontinalis, Berk.; Microspora floccosa, 
Thur. ; Sorastrum spinulosum, Neg.; Cladophora glomerata, L. ; 
C. flavescens, Ag.; Chetophora endiviefolia, Ag.; C. pisiformis, 
Ag.; C. elegans, Ag.; Pediastrum pertusum, Kg.; P. Ehren- 
bergii, A. Br.; P. Boryanum, Turpin; P. constrictum, Hass. Des- 
midium aptogonium, Breb.; D. Baileyit, Ralfs. Docidium Tra- 
becula, Neg.; D. crenulatum, Rab.; Cosmarium cruciatum, 
Breb.; C. protractum, Arch.; C. Botrytis, Menegh.; C. marga- 
ritiferum, Menegh.; C. bioculatum, Breb.; C. dentatum, Wolle; 
C. ornatum, Ralfs, var. protractum, Wolle; C. intermedium, 
Delp.; C. nitidulum, DeNot.; C. Portianum, Arch.; C. Ralfsii, 
Breb.; Staurastrum eustephanum, Ralfs; S. gracile, Ralfs; S. 
punctulatum, Breb.; S. Brebissonti, Arch.; S. arctiscon, Ehrb. ; 
S. polymorphum, Breb.; S. Avicula, Breb.; Euastrum elegans, 
Kg.; £. verrucosum, Ralfs; Xanthidium fasciculatum, Ralfs ; 
X. antilopeum, (Breb.) Kg.; Closterium costatum, Corda; C. 
Venus, Kg.; C. Ehrenbergii, Menegh., var. immane, Wolle; C. 
rostratum, ¥hrb.; C. Leibleinii, Kg.; C. acerosum, Ehrb.; C. 
