Checklist » Cyperaceae » Eleocharis quinqueflora
Last updated 4/7/2009 by David Giblin.
Eleocharis quinqueflora (Hartm.) O. Schwarz[FNA23, HC2]
few-flowered spike-rush

Publication: Mitt. Thüring. Bot. Ges. 1: 89. 1949.

Origin: Native

selected vouchers: WTU

Notes: The name E. quinqueflora does not appear in H&C.

FNA23: "The chromosome numbers for Eleocharis quinqueflora reported for North America (2n = 80) are in doubt because vouchers and other information are lacking. The often-cited n = 10 is probably erroneous. S.-O. Strandhede and R. M. T. Dahlgren (1968) gave 2n = 132 and 134 from Scandinavia. Recognition of infraspecific taxa within E. quinqueflora is premature pending a worldwide revision of subg. Zinserlingia. It has been reported from North Dakota, although I have not seen specimens. About five varieties and subspecies of E. quinqueflora have been described worldwide.

Most specimens from eastern North America and some from the West can be placed in Eleocharis quinqueflora subsp. fernaldii (Svenson) Hultén, which is characterized by its small size (culms to 15 cm × 0.5 mm) and small bulbs. Specimens of E. quinqueflora from 2000–3600 m in California, which are atypical, especially in that the proximal scales of the spikelets do not subtend flowers, may deserve taxonomic recognition. Those plants are also small, with culms only to 15 cm × 0.5 mm; hard caudices are often present at the culm-tuft bases; small, narrowly ovoid bulbs are sometimes present; and perianth bristles are absent or rudimentary. Very few specimens of E. quinqueflora are intermediate with E. suksdorfiana."

References: (none)

Synonyms & Misapplied Names:
Eleocharis fernaldii (Svenson) Á. Löve
Eleocharis pauciflora (Lightf.) Link[HC, JPM]
Eleocharis pauciflora (Lightf.) Link var. fernaldii Svenson
Eleocharis quinqueflora (Hartm.) O. Schwarz ssp. fernaldii (Svenson) Hultén
Scirpus quinqueflorus Hartm.