Arophyton Jum.
  • Ann. Mus. Colon. Marseille, sér. 4, 6(2): 21, 23 (1928) 


Notes: Distribution: Madagascar

General Description

HABIT : seasonally dormant herbs, rhizomatous or tuberous. LEAVES : 1-few. PETIOLE : sheath short. BLADE : cordate, hastate, trifid to trisect or pedatifid, primary lateral veins pinnate, forming submarginal collective vein, secondary laterals sometimes parallel-pinnate, otherwise higher order venation reticulate. INFLORESCENCE : (1-)2-3 in each floral sympodium. PEDUNCLE : subequal or shorter than petiole. SPATHE : not or slightly constricted between tube and blade, tube persistent at maturity or entire spathe marcescent, blade widely spreading, white or cream to greenish within. SPADIX : fertile to apex, or with short appendix, entirely free or female zone partly adnate to spathe, female zone contiguous with male, or separated by synandrodia or a few bisexual flowers. FLOWERS : unisexual, perigone absent. MALE FLOWER : 2-7-androus, stamens connate, synandrium elongate-ellipsoid, often irregularly shaped, shallow, truncate, sometimes with a central slit, common connective broad, thecae marginal, broad-ellipsoid to globular, dehiscing by slit or pore on upper surface. POLLEN : inaperturate, spherical to subspheroidal, medium-sized (mean 32 µm., range 27-36 µm.), exine spinose. FEMALE FLOWER : gynoecium surrounded by cup-like synandrodium, ovary 1-locular, ovule 1, orthotropous, funicle usually short, placenta basal, style short to relatively long and cylindric-conoid, or ± absent, stigma discoid. STERILE FLOWERS : truncate synandrodium with central cavity. BISEXUAL FLOWERS : as for female flowers, but surrounded by synandrium bearing a few scattered thecae. BERRY : ellipsoid to fusiform or clavate, red or green. SEED : ellipsoid to globular, testa thin, smooth, embryo large, globular or ellipsoid, plumule subapical, endosperm absent.

Diagnostic Description

Seasonally dormant geophytes or epiphytes; leaf blade cordate, trifid, trisect or pedatifid, submarginal collective vein present, fine venation transitional between parallel-pinnate and reticulate; spadix sometimes with short sterile terminal appendix; flowers unisexual, perigone absent; synandrium with marginal thecae dehiscing on the upper surface; female flowers surrounded by a cup-like synandrode. Colletogyne differs in the invariably cordate leaf blades, female zone entirely adnate to spathe and synandria composed of a single stamen. Carlephyton differs in the spadix always fertile to the apex, and the thecae either dehiscing on lower surface of synandrium, or with upper part of stamens free.

Habitat

Tropical humid, seasonal forest or deciduous forest on limestone; geophytes or epiphytes, litter-filled crevices and holes.

Distribution

Madagascar.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Africa Western Indian Ocean Madagascar

  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 Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.
  • 3 Gardens, K.""Royal Bot World Checklist of Selected Plant Families. (2008).
  • 4 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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