Isoetes howellii Engelm.
Howell's quillwort
Isoetaceae (Quillwort family)
Introduction to Vascular Plants
Howell's quillwort
Isoetaceae (Quillwort family)
Introduction to Vascular Plants
Introduction
Midget quillwort is found in North America only in Washington State and British Columbia ({ah}//plants.usda.gov/java/profile?symbol=ISMI4USDA 2010{/a}). In British Columbia, it is reported from Castlegar and Salmo, where it was collected by Adolf Ceska. Ceska and Ceska (2001) provide the following information for this species: “Isoetes minima differs from I. howellii by having small, spiny megaspores and by sporangia that completely lack velum. Megaspores of Isoetes howellii have low ridges and its sporangia have partial velum.....Isoetes minima was described from a single collection made by Wilhelm Suksdorf from Spangle near Spokane, WA, and until recently, the only authentic material of this taxon has been the type specimen."
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Species Information
General:
Perennial semiterrestrial or terrestrial plants from a short 2-lobed rootstock.
Leaves:
Deciduous, flaccid, 5-25 cm long, with long transparent lower parts and black-tinged bases.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia