The World Flora Online

Plants perennial, of marshes, with creeping rhizomes. Stems erect, leafy, unbranched. Leaves alternate, linear, sheathing at base; sheaths open, with a prominent ligule at juncture of sheath and blade; sheath remains often persistent, intravaginal hairs numerous. Racemes terminal, few flowered. Flowers bisexual, 3-merous, bracteate. Pedicels elongating following fertilization. Perianth segments 6, in 2 series, sepaloid, free, persistent; stamens 6, free, with elongated filaments; anthers basifixed, linear, extrorse, opening by longitudinal slits. Pistils 3(-6), distinct to connate at base; stigmas sessile, papillose; ovules 2 or few in each carpel. Fruiting carpels follicular, inflated; follicles 1-4 per aggregate. Seeds 1 or 2(or 3), without endosperm; embryo straight.

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Herbs, perennial, rhizomatous, caulescent; turions absent. Leaves alternate, emergent, sessile; sheath with remains often persisting, auriculate; blade linear, nearly cylindric, with conspicuous round pore adaxially on leaf tip; intravaginal squamules hairs, numerous. Inflorescences terminal, bracteate racemes, not subtended by spathe; pedicels following fertilization elongating, not spiraling. Flowers bisexual; subtending bracts present; perianth present; tepals 6; stamens 6, epitepalous; anthers basifixed, distinct, dehiscing longitudinally, extrorse; pollen globose; pistils 3(--6), distinct to slightly connate at base; ovules basal-marginal, anatropous. Fruits follicles. Seeds 1--2(--3).

Fls in terminal, bracteate racemes, perfect, anemophilous, hypogynous, trimerous; perianth of 2 similar cycles of 3 distinct, yellow-green tep; stamens 6, free and distinct; filaments short; anthers elongate, extrorse; pollen in dyads, inaperturate; carpels 3(–6), slightly connate at base, otherwise distinct, each with an extrorse, sessile stigma; ovules 2 (–several), basal-marginal; fr of recurved-spreading follicles; seed without endosperm; embryo with a single rounded cotyledon; rhizomatous perennial herbs; lvs alternate, cauline and basal, with an open sheath, prominent ligule, and elongate, semiterete blade with an evident pore on the inner side at the tip; stem with numerous long, intravaginal hairs at the nodes. Monotypic.

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SELECTED REFERENCES

Britton, N. L. 1909. Scheuchzeriaceae. In: N. L. Britton et al., eds. 1905+. North American Flora.... 47+ vols. New York. Vol. 17(1), , pp. 41--42. Cody, W. J. 1975. Scheuchzeria palustris L. (Scheuchzeriaceae) in northwestern North America. Canad. Field-Naturalist 89: 69--71. Fernald, M. L. 1923. The American variety of Scheuchzeria palustris. Rhodora 25: 177--179. Thieret, J. W. 1988. The Juncaginaceae in the southeastern United States. J. Arnold Arbor. 69: 1--23.

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