Colletogyne Buchet
  • Bull. Soc. Bot. France 86: 23 (1939) 


Notes: Distribution: N. Madagascar

General Description

HABIT : seasonally dormant herbs, tuberous. LEAVES : 1 (-2). PETIOLE : sheath short. BLADE : cordate; primary lateral veins pinnate and also arising from petiole insertion, forming submarginal collective vein, 1-2 marginal veins also present, secondary and tertiary laterals mostly parallel-pinnate, higher order venation reticulate. INFLORESCENCE : 1-3 in each floral sympodium, appearing before or with leaves. PEDUNCLE : shorter than petiole. SPATHE : obovate, not constricted, erect, fully expanded at anthesis, closing later and persisting to fruiting stage, red-spotted on greenish background. SPADIX : fertile to apex, female zone adnate to spathe, female and male zones contiguous. FLOWERS : unisexual, perigone absent. MALE FLOWER : 1-androus, filament conoid, variegated, anther apical-oblique, thecae ellipsoid, dehiscing by slit. POLLEN : inaperturate, spherical, medium-sized (mean 39 µm.), exine spinose, obscurely verruculate between spines, spines long, stout. FEMALE FLOWER : gynoecium surrounded by a cup-like, variegated synandrodium, ovary ovoid-ellipsoid, 1-locular, ovule 1, orthotropous, funicle short, placenta basal, style shortly attenuate, stigma discoid-capitate. BERRY : fusiform, stigma remnant persistent, reddish-spotted. SEED : ellipsoid, testa thin, smooth, embryo with lateral plumule, endosperm absent.

Diagnostic Description

Seasonally dormant tuberous geophytes; leaf blade with secondary and tertiary venation parallel-pinnate, finer venation reticulate; spathe expanded, obovate, inner surface covered with reddish spots; spadix with female zone adnate to spathe; flowers unisexual, perigone absent; female flowers surrounded by a variegated synandrode. Differs from Arophyton and Carlephyton in having synandria reduced to one stamen, thecae apical on conical filament, spadix fertile to apex, leaf blade always cordate (leaves various in Arophyton ).

Habitat

Tropical deciduous forest, on limestone; geophytes in holes or crevices with leaf litter.

Distribution

N. Madagascar.

Distribution Map

 
  • Native distribution
Found in
  • Africa Western Indian Ocean Madagascar

Included Species

  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. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. Continental Publishing, 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
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
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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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