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SCHEUCHZERIACEAE SCHEUCHZERIA FAMILY

C. Barre Hellquist

Perennial herb, rhizomed, aquatic, generally emergent, on floating mats, or terrestrial. Stem: erect, generally simple, slender. Leaf: basal, cauline, alternate, simple; sheath generally open; ligule prominent; blade erect, linear, subcylindric, tip with a large pore. Inflorescence: raceme, terminal, flower bracts leaf-like, pedicels elongating after flower. Flower: bisexual, radial; perianth parts 6, in 2 ± dissimilar whorls, free; stamens 6, in 2 whorls, fused to perianth, anthers opening outward by slits; pistils 3(6), ± united at base or not, free above, ovary superior, chamber 1, ovules 1–3, style stout [0], papillate or plumose. Fruit: follicles.
1 genus, 1 sp.: western and eastern North America, Eurasia. [Nienaber 2000 FNANM 22:41–42] —Scientific Editor: Thomas J. Rosatti.

SCHEUCHZERIA
(J.J. Scheuchzer, Swiss botanist, 1672–1733, and brother, J. Scheuchzer, 1684–1738)
Unabridged etymology: (Johann Jakob Scheuchzer, Swiss botanist, 1672–1733, and his brother, Johannes Scheuchzer, 1684–1738)

S. palustris L. SCHEUCHZERIA
NATIVE
Glabrous. Stem: 1–4 dm, zigzag. Leaf: striate; ligule 2–12 mm; basal 1–2(3) dm; cauline reduced upward, blade 1–3 mm wide. Inflorescence: peduncle in fruit < 2.5 dm; pedicels spreading, 5–25 mm; flowers 3–12. Flower: perianth parts 2–3 mm, 1-veined, green-white. Fruit: generally 1–4, 4–10 mm, dehiscing on curved, adaxial side, beak 0.5–1 mm. Seed: 1–3, 4–5 mm.
2n=22. Floating mats, bogs, lake margins; 1400–2000 m. s High Cascade Range; to Alaska, eastern North America; Eurasia. [Scheuchzeria palustris subsp. americana (Fernald) Hultén] Variation in fruit, stigmas does not support infraspecific taxa. Jul–Aug [Online Interchange] {CNPS list}

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 23 2014
Citation for this treatment: [Author of taxon treatment] 2013. Scheuchzeria, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=43474, accessed on Nov 23 2014

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click for enlargement Scheuchzeria palustris
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2006 Louis-M. Landry

Geographic subdivisions indicated for the distribution of Scheuchzeria palustris Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.