Carex spissa was created in 1886.
Coccothrinax spissa was created in 1939.
Ceriporia spissa was created in 1822.
Amanita excelsa var. spissa was created in 2004.
Carex umbrosa was created in 1801.
Carex pansa was created in 1888.
Carex mertensii was created in 1832.
Carex leporinella was created in 1917.
Carex cespitosa was created in 1753.
Carex vesicaria was created in 1753.
Carex multicostata was created in 1917.
Carex haydeniana was created in 1871.
Carex microptera was created in 1909.