Lasimorpha Schott
  • Bonplandia (Hannover) 5: 127 (1857) 


Notes: Distribution: Trop. Africa

General Description

HABIT : robust to gigantic evergreen herbs forming large colonies, rhizome short, thick, hypogeal, vigorously stoloniferous. LEAVES : several. PETIOLE : very long, 4-6 angled, aculeate along angled ridges, weakly geniculate at apex, sheath short. BLADE : deeply sagittate, sometimes weakly hastate, to over 1m long, coriaceous, ± erect; basal ribs well-developed, primary lateral veins pinnate, long arcuate towards apex of each leaf division and running into marginal vein, higher order venation reticulate. INFLORESCENCE : solitary, appearing with leaves. PEDUNCLE : subequal to petiole and similar in appearance. SPATHE : erect, ovate, ± convolute in lower third, gaping at anthesis, striped purple and yellow within, persistent. SPADIX : sessile to stipitate, cylindric, obtuse, shorter than spathe, flowering sequence basipetal. FLOWERS : bisexual, perigoniate; tepals 4(-5), free, fornicate. STAMENS : 4(-5), filaments free or partially to completely connate, anthers partially exserted from tepals at anthesis, connective slender, thecae dehiscing by short apical slit. POLLEN : monosulcate, ellipsoid, small (22 µm.), exine subreticulate, apertural exine psilate. GYNOECIUM : ovoid-ellipsoid to oblong, ovary 1-locular, ovules 4-6(-8), campylotropous, placenta single, ± prominent, parietal and basal, stylar region short, somewhat narrowed, stigma discoid-hemispheric. BERRY : irregularly globose, 1-4-seeded, red. SEED : strongly curved, weakly strophiolate, testa hard, brown, warty to spiny, embryo rather large, curved, endosperm present but only as a few cell layers.

Diagnostic Description

Robust to gigantic helophytes forming large colonies, rhizome short, thick, hypogeal; petiole 4-6-angled; leaf blade deeply sagittate, fine venation reticulate; flowers bisexual, perigoniate; ovules 4-6 (-8). Differs from Cyrtosperma in having long stolons, petiole spines in ridges, stamen filaments free or connate (free in Cyrtosperma ) and tropical West African range.

Habitat

Tropical swamp forest, open wet areas; helophyte along streams, in ditches and ponds, in forest gaps, often very abundant.

Distribution

Trop. Africa.

Distribution Map

 
  • Native distribution
Found in
  • Africa Northeast Tropical Africa Chad
  • South Tropical Africa Angola
  • West Tropical Africa Benin
  • Gambia, The
  • Ghana
  • Guinea
  • Guinea-Bissau
  • Ivory Coast
  • Liberia
  • Nigeria
  • Senegal
  • Sierra Leone
  • Togo
  • West-Central Tropical Africa Cameroon
  • Central African Republic
  • Congo
  • Gabon
  • Gulf of Guinea Is.
  • Zaire

  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
  • B   http://creativecommons.org/licenses/by-nc-sa/3.0/
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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