1912) Fernald & Wiegand,— Variety of Carex scoparia 115 
*Tetraedron regulare, Kuetzing. 
*Tetraedron enorme, Hansgirg. 
Scenedesmus bijuga, Wittrock. 
*Crucigenia rectangularis, Gay. Rare. 
* Elakatothrix americana, Wille. Scarce. 
*Coelastrum microporum, Naegeli. 
Sorastrum spinulosum, Naegeli. Common. 
Pediastrum boryanum, Meneghini. Common. 
Pediastrum tetras, Ralfs. Scarce. 
*Cylindrocapsa geminella, Wolle. Very common. 
Chaetosphaeridium globosum, Klebahn. On Cladophora fracta. 
*Gloiococcus mucosus, A. Braun. Common. 
*Gloeotaenium loitlesbergerianum, Hansgirg. Both four-celled and 
two-celled forms of this species were present in the collections made 
both on July 21 and July 23. This is the first record for this species 
on the North American Continent, the only record previously pub- 
lished for the Western Hemisphere being from Trinidad. 
*Cladophora fracta, Kuetzing. (Common. 
QuEEN's Untversity, Kingston, Ontario. 
A BLUNT-SPIKED VARIETY OF CAREX SCOPARIA. 
M. L. FERNALD AND K. M. WIEGAND. 
In eastern Newfoundland much of Carex scoparia so strongly re- 
sembles C. tribuloides, var. turbata in its slightly flexuous elongate 
head of subturbinate almost flat-topped spikes that, when the plant 
was first brought to notice during the past summer, by Mr. E. B. 
Bartram who was collecting with us, we were inclined to class it as a 
form of C. tribuloides. But the plant, which afterward proved to be 
generally distributed in eastern Newfoundland has the narrow leaves, 
close sheaths and the straw-colored or brownish somewhat lustrous 
spikes of C. scoparia, and is clearly an extreme of that species. Ex- 
amination of all the material in the Gray Herbarium and the herbarium 
of the New England Botanical Club — about 250 sheets — shows that 
