Lysichiton Schott
  • Oesterr. Bot. Wochenbl. 7: 62 (1857) 


Notes: Distribution: Temp. E. Asia, Russian Far East, Alaska to W. U.S.A.

General Description

HABIT : large herb with thick, hypogeal rhizome. LEAVES : numerous. PETIOLE : thick, flattened to deeply sulcate, sheath long. BLADE : becoming large, ovate-elliptic to ovate-oblong; primary lateral veins pinnate, running into inconspicuous marginal vein, higher order venation ± regularly transverse-reticulate between primaries. INFLORESCENCE : solitary, appearing just before or with the leaves in early spring. PEDUNCLE : absent, spadix supported on elongated stipe. SPATHE : marcescent, inserted at the point of attachment of spadix stipe to rhizome, cucullate to boat-shaped, lower part narrowly convolute and clasping spadix stipe, blade expanded, ovate, white or yellow. SPADIX : subcylindric, subacute at apex, stipe extremely elongated. FLOWERS : bisexual, perigoniate; tepals 4, cucullate, imbricate. STAMENS : 4, filaments oblong, flattened, connective slender, thecae ellipsoid, dehiscing by longitudinal slit. POLLEN : monosulcate, ellipsoid, medium-sized (mean 40 µm., range 38-43 µm.), exine reticulate. GYNOECIUM : elongate-ovoid, attenuate apically, ovary immersed in spadix axis, 2-locular or incompletely 2-locular, ovules 1-2 per locule, orthotropous, broad, conoid, funicle very short and thick, placenta axile, thick, style attenuate, longer than tepals, stigma discoid-hemispheric. BERRY : ellipsoid, mostly 2-seeded, green, decaying or stylar portion breaking off with perigone at maturity to expose seeds embedded in spadix axis. SEED : ± ellipsoid, somewhat compressed, testa smooth, embryo large, ellipsoid, endosperm nearly absent, present only as a single cell layer.

Diagnostic Description

Temperate helophytes with thick, hypogeal rhizome; leaf blade entire, ovate to oblong, fine venation reticulate; spathe blade white or yellow; spadix stipe very long, enclosed by lower part of spathe for most of its length down to attachment with rhizome; flowers bisexual, perigoniate, tepals free; ovary 2-locular, ovules 2 per locule, orthotropous, placenta axile.

Habitat

Temperate wetlands; helophytes, in swamps and wet woodlands.

Distribution

Temp. E. Asia, Russian Far East, Alaska to W. U.S.A.

Distribution Map

 
  • Native distribution
  • Introduced distribution
Specimens
Found in
  • Asia-Temperate Eastern Asia Japan
  • Russian Far East Kamchatka
  • Khabarovsk
  • Kuril Is.
  • Primorye
  • Sakhalin
  • Northern America Northwestern U.S.A. Idaho
  • Montana
  • Oregon
  • Washington
  • Southwestern U.S.A. California
  • Subarctic America Alaska
  • Aleutian Is.
  • Western Canada British Columbia
Introduced into
  • Europe Middle Europe Germany
  • Northern Europe Great Britain
  • Ireland
  • Sweden

  Bibliography

  • 1 Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 2 Gardens, K.""Royal Bot World Checklist of Selected Plant Families. (2008).
  • 3 Mayo, S.J., Bogner, J. & Boyce, P.C. The Genera of Araceae. (Royal Botanic Gardens Kew: 1997).

 Information From

CATE Araceae
http://araceae.e-monocot.org
Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 14 Dec 2011 . 17 Dec 2011.
  • A All Rights Reserved
Global Biodiversity Information Facility
http://data.gbif.org
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eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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