Isoëtes bolanderi
Amer. Naturalist 8: 214. 1874.
Common names: Bolander's quillwort
Synonyms: Isoëtes bolanderi var. parryi EngelmannIsoëtes californica EngelmannIsoëtes pygmaea unknown
Treatment appears in FNA Volume 2.
Revision as of 19:02, 26 July 2019 by FNA>Volume Importer
Plants aquatic, occasionally emergent. Rootstock nearly globose, 2-lobed. Leaves deciduous, bright green, pale-brown toward base, spirally arranged, to 20 cm, pliant, abruptly tapering to fine tip. Velum covering less than 1/2 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 300–500 μm diam., rugulate to tuberculate; girdle obscure. Microspores brown in mass, 20–30 μm, spinulose. 2n = 22.
Habitat: Alpine or subalpine lakes and ponds
Distribution
Alta., B.C., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.
Discussion
Small plants with leaves less than 2.5 cm have been called Isoëtes bolanderi var. pygmaea (Engelmann) Clute.
Isoëtes bolanderi hybridizes with I. echinospora and I. occidentalis.
Selected References
None.
Lower Taxa
None.