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Western Wetland Flora

Field Office Guide to Plant Species

Spiny-spore Quillwort
Isoetes echinospora Durieu

JPG -- Species Photo JPG -- Distribution Map

Family: Quillwort (Isoetaceae)
Spores: May-June
Field Marks: This always submersed quillwort has coarse leaves not more than 3 1/2 inches long.
Habitat: Lakes.
Habit: Submersed perennial plant with a 2-lobed corm.
Stems: Underwater as a 2-lobed corm.
Leaves: Elongated, grass-like, coarse, up to 30 in number, up to 3 1/2 inches long, swollen at the base to contain the sporangia.
Sporangia: Borne within the swollen, paler base of each leaf.
Spores: White or cream-colored with minute spines (when viewed through a microscope).

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Page Last Modified: Saturday, 02-Feb-2013 06:23:34 EST
Menlo Park, CA [caww55]