Coefficient of Conservatism:
Coefficient of Wetness:
Moist to wet forests and thickets, wet open depressions and wet fields and ditches.
In Carex squarrosa, perigynium beaks radiate in all directions, i.e., the lowermost perigynia have beaks that point downward, perigynia in the middle of the spike have beaks that point outward, and perigynia at the apex have their beaks pointing upward. In the very similar Carex typhina, even the lowest perigynium beaks point outward or upwards.
Long known from southestern Michigan (Lenawee, Monroe, Washtenaw, and Wayne Cos.), where collected as early as 1832; occurrences remained few and confined to this area until the 1990's when numerous occurrences began to be located, north to Gratiot and west to Berrien Cos.